Consulta: subjectFacets:"Plant nutrition"
Registros recuperados: 138
Data/hora: 06/06/2024 03:43:42

Eficiencia de las rizobacterias promotoras del crecimiento vegetal (RPCV) en plántulas de caña de azúcar (Saccharum spp.).
Provedor de dados: 32
Autores: Morgado González, Antonio.
Las Rizobacterias Promotoras de Crecimiento Vegetal (RPCV) son una alternativa en la nutrición de plantas cultivadas, ya que estimulan su crecimiento y rendimiento, mejorando la absorción de nutrimentos, el aumento en su movilización, la producción de antibióticos y de reguladores de crecimiento. La caña de azúcar (Saccharum spp.) es un cultivo muy demandante de nutrimentos y de alto rendimiento en México,  el uso de las RPCV es fundamental para mejorar su rentabilidad. En esta investigación, se evaluó la efectividad en producción de índoles totales por el método Salkowski, solubilización de fosfatos con medio Pikovskaya  de 24 cepas bacterianas de siete especies, y su impacto en el desarrollo de vitroplantas de caña de azúcar de la variedad Mex 69-290 al...
Palavras-chave: Nutrición vegetal; Biofertilizantes; Desarrollo; Fosfatos solubles; Fitohormonas; Plant nutrition; Biofertilizers; Plant development; Soluble phosphates; Plant growth regulators; Fisiología Vegetal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2078

Producción de plántulas de pimiento morrón (Capsicum annuum L.) en sustratos derivados de residuos agrícolas.
Provedor de dados: 32
Autores: Pérez López, Hermelindo.
Con el propósito de encontrar alternativas y tratar de reducir el impacto ambiental que ocasiona el uso de la turba y otros materiales convencionales, se evaluaron subproductos orgánicos agroindustriales (bagazo de la caña de azúcar, cachaza y cascarilla de café) en combinación con material inorgánicos (tezontle). El objetivo fue caracterizar las propiedades físicas y químicas de mezclas de sustratos basados  en residuos agrícolas y evaluar su uso en la producción de plántulas de cinco variedades de pimiento morrón. Los sustratos fueron: 1) TZBZ: tezontle + bagazo de la caña; 2) TZCC: tezontle + cascarilla de café; 3) TZCZ: tezontle + cachaza; y  4) TZ: tezontle; formuladas en una proporción 40/60 (v/v). Como variable de respuesta se contabilizó porcentaje...
Palavras-chave: Sustrato lignocelulósicos; Cachaza; Bagazo; Cascarilla de café; Germinación; Nutrición vegetal; Lignocelulosic substrates; Cachasse; Bagasse; Caffee husk; Solanaceae; Germination; Plant nutrition; Fisiología Vegetal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/2177

Respuestas agronómicas y fisiológicas de pepino a diferentes concentraciones de cloruro de sodio
Provedor de dados: 32
Autores: García Morales, Soledad.
La salinidad del suelo es una de las principales limitantes en la producción de  alimentos debido a que afecta negativamente muchos aspectos del metabolismo y  rendimiento de las plantas cultivadas. La respuesta de las plantas a la salinidad  consiste en numerosos procesos que funcionan coordinadamente para aliviar tanto el  estrés osmótico como la toxicidad y el desbalance nutrimental.   La presente investigación fue conducida bajo condiciones de invernadero durante el  período Otoño del 2006 en el Colegio de Postgraduados, Campus Montecillo. Se  evaluó el efecto de cinco concentraciones de cloruro de sodio (0, 47, 97, 150 y 205  mM de NaCl) suministradas en la solución nutritiva Steiner al 100 % empleada para  el riego, para analizar sus efectos en...
Tipo: Tesis
Palavras-chave: Salinidad; Crecimiento; Rendimiento; Calidad de frutos; Fisiología de plantas; Nutrición de plantas; Maestría; Edafología; Salinity; Growth; Yield; Fruit quality; Plant physiology; Plant nutrition.
Ano: 2007
URL: http://hdl.handle.net/10521/1315

Desarrollo y verificación de concentraciones críticas y normas DRIS para brinzales y latizales de Pinus patula Schl. et Cham.
Provedor de dados: 32
Autores: Sánchez Parada, Agustina.
El diagnóstico nutrimental es una herramienta fundamental para el uso eficiente de fertilizantes. Ayuda a incrementar la productividad y a disminuir la contaminación de suelos y agua por exceso de fertilización. Se desarrollaron y verificaron concentraciones críticas y normas DRIS para árboles de P. patula Schl. et Cham. de aproximadamente 10 años de edad. Se generó una base de datos de 50 árboles de P. patula distribuidos en estados del centro de México. Las concentraciones críticas y normas DRIS se generaron a partir de los árboles de mayor incremento en diámetro. La verificación se realizó en dos plantaciones: (a) una plantación de 17 años de edad en Veracruz, la cual consistió en un experimento factorial 3×3×2 con 10 repeticiones por tratamiento, y (b)...
Palavras-chave: Nutrición vegetal; Fertilización química; Diagnóstico nutrimental; Plantación forestal; Plant nutrition; Chemical fertilization; Nutrient diagnosis; Forest plantation; Forestal; Maestría.
Ano: 2013
URL: http://hdl.handle.net/10521/1877

CHEMICAL PROPERTIES OF SOIL FERTIRRIGATED WITH DAIRY AND SLAUGHTERHOUSE WASTEWATER
Provedor de dados: 70
Autores: Oliveira,Jacineumo F. De; Rodrigues,Fernando N.; Fia,Ronaldo; Vilela,Hévelyn S.; Landim,Daniela V.
ABSTRACT The aim of this study was to evaluate the soil chemical properties submitted to fertigation with slaughterhouse (SW) and dairies (DW) wastewater. The experiment was conducted in the Environmental Engineering Center and Sanitary of UFLA/MG in PVC columns filled with Dark Red Latosol (Oxisol) and randomly distributed. The treatments applied with nitrogen based load (300 kg ha years-1 of N) consisted of four doses of SW and DW (100, 200, 300 and 400% of the recommendation) and AQT0 control at random. The soil was collected at a depth of 0.30 m and, subsequently, characterized in terms of physical, chemical and physicochemical. The application of treatment of the largest irrigation of DW provided, after 120 days of monitoring, N concentration of 1.85...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil quality; Fertigation; Plant nutrition; Agroindustrial wastewater.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000601244

SEASONAL VARIATION IN LEAF LITTER NUTRIENT CONCENTRATIONS OF VALDIVIAN RAINFOREST TREES
Provedor de dados: 73
Autores: Lusk,Christopher H.; Matus,Francisco; Moreno-Chacón,María; Saldaña,Alfredo; Jiménez-Castillo,Mylthon.
Resorption of nutrients from senescing tissues is an important aspect of the nutrient economy of perennial plants, and a major influence on ecosystem nutrient dynamics. Attempts to interpret the adaptive significance of variation in nutrient resorption efficiency have met with little success, leading some scientists to emphasize the need for more work on the biochemical and physiological basis of resorption. One hypothesis suggests than variation in resorption is controlled by sink-source effects within the plant. According to this hypothesis, we might expect resorption to be positively correlated with plant growth rates. This could be expected not only for comparisons among species or populations, but also when comparing conspecific individuals growing at...
Tipo: Journal article
Palavras-chave: Nitrogen; Nutrient cycling; Phosphorus; Plant nutrition; Resorption.
Ano: 2003
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000100006

Growth, yield, nutrient accumulation and export and thermal sum of Italian zucchini
Provedor de dados: 75
Autores: Purquerio,Luis Felipe V; Mattar,Gabriel S; Duart,Adriana M; Moraes,Carolina C de; Araújo,Humberto S; Santos,Fabrício Franco dos.
ABSTRACT Studies on plant nutrition are essential for a correct fertilizer management, improving yield and quality of the product, and it also may contribute for an updating recommendation. The aim of this study was to evaluate growth, nutrient accumulation and export, thermal sum and yield of zucchini cultivar Corona F1. The experiment was carried out from August 8 to October 25, 2013, in Santo Antônio de Posse, São Paulo State. At the end of the research, 84 days after transplanting (DAT), we observed 95 cm average height with 36 leaves and 45.8 t ha-1 maximum yield. The nutrient accumulation, in g plant-1, was: N (14.2) &gt; K (9.3) &gt; Ca (8.0) &gt; Mg (2.5) &gt; S (1.2) &gt; P (0.9) and in mg plant-1, Mn (49.3) &gt; Fe (34.9) &gt; Zn (19.6) &gt; B...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucurbita pepo; Growth; Plant nutrition; Horticulture; Sustainability.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000200221

Potassium chloride fertilization of potatoes: nutrient uptake rate and tuber yield of cultivars Ágata and Atlantic
Provedor de dados: 75
Autores: Luz,José Magno Q; Oliveira,Roberta C; Lana,Regina Maria Q; Silva,João Ricardo R; Rebouças,Tiyoko Nair H.
ABSTRACT Potassium (K) is the nutrient taken up in the greatest quantity by the potato plant. Obtaining information about the relationship between tuber yield and K application rate allows improvements in fertilizer use efficiency. We aimed to evaluate the variation in potassium fertilizer doses in uptake rate of other nutrients and in potato tuber yield. The experiments were carried out in Unaí-MG testing cultivars Ágata and Atlantic and in Mucugê-BA evaluating cultivar Ágata. The experimental design used was randomized blocks. We studied the rates of 0; 70; 110; 220, and 450 kg ha-1 K2O. The increase in K rate reduced the levels of S, Ca, Mg and B in Atlantic-Unaí, Ca, Mg, Zn and B in Ágata-Unaí and S, Fe and B in Ágata-Mucugê. The cultivar Atlantic-Unaí...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum tuberosum; Mineral fertilization; Plant nutrition.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362020000400400

Increasing doses of potassium increases yield and quality of muskmelon fruits under greenhouse
Provedor de dados: 75
Autores: Preciado-Rangel,Pablo; Salas-Pérez,Lilia; Gallegos-Robles,Miguel Á; Ruiz-Espinoza,Francisco H; Ayala-Garay,Alma V; Fortis-Hernández,Manuel; Murillo-Amador,Bernardo.
ABSTRACT Potassium (K) influences the variables that determine quality of fruit and the concentration of phytonutrients to human health and therefore consumer preferences. The objective of this study was to evaluate the effect of different concentrations of K in the nutrient solution (5, 7, 9 and 11 mM of K) on yield and quality of Cantaloupe fruits under greenhouse conditions. The experiment was conducted in pots using a completely randomized design with 15 replications. Analysis of variance, correlation, regression and multiple comparisons among means (Tukey p&lt;0.05) were performed. Results showed higher values of yield, average fruit weight, equatorial diameter, pulp thickness, fruit firmness, soluble solids content, phenolic content and antioxidant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis melo; Plant nutrition; Nutraceutical quality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000200184

Diagnosis and recommendation integrated system (DRIS) of tomato in greenhouse
Provedor de dados: 75
Autores: Scucuglia,Cesar L; Creste,José E.
Plant nutrition is one of the most important factors for successful cultivation of tomatoes, especially in the greenhouse, and Diagnosis and Recommendation Integrated System (DRIS) is an alternative for fertilizer recommendation. This study aimed to establish DRIS norms for tomato plants growing in greenhouse located at Norte Pioneiro do Paraná region (Paraná State, Brazil). Chemical analysis of nutrients on leaves (N, P, K, Ca, Mg, S, B, Cu, Fe, Mn and Zn) of hybrid tomatoes (Colibri, Pizzadoro, Debora Max and Granadero), and respective yields of 61 growing areas in greenhouses (24.4 ha) were used. Samples were collected during April to December 2010, in five cities. Five levels of tomato yield (6, 7, 8, 9, and 10 kg plant-1) were used for establishing a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Foliar diagnosis; Nutritional balance; Plant nutrition; Nutrient.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362014000200200

Broccoli production depending on the seed production system and organic and mineral fertilizer
Provedor de dados: 75
Autores: Lopes,José Carlos; Mauri,Janaína; Ferreira,Adésio; Alexandre,Rodrigo S; Freitas,Allan R de.
The experiment was conducted in a greenhouse at the Universidade Federal do Espirito Santo, in Alegre, Espirito Santo state, Brazil, to evaluate the broccoli production depending on the seed production system and organic and mineral fertilization. Seeds of the broccoli cultivar Ramoso Piracicaba were originated from lots of seed obtained in an organic and conventional production system. The experimental design was of randomized blocks, with four replications in a factorial arrangement combination of the lots, 2x5 (organic and mineral fertilized seeds) and substrates [S1 (soil + sand + manure), S2 (soil + sand + manure + NPK), S3 (soil + sand + manure + Fertium® 10 g L-1), S4 (soil + sand + manure + Fertium® 30 g L-1) and S5 (soil + sand + manure + Fertium®...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brassica oleracea var. italica; Emergence; Productivity; Plant nutrition; Substrate.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000100024

Doses of organic compost on yield and accumulation of macronutrients on endive
Provedor de dados: 75
Autores: Lanna,Natália BL; Silva,Priscilla Nátaly L; Colombari,Lidiane F; Freitas-Nakada,Pâmela G; Cardoso,Antonio Ismael Inácio.
ABSTRACT The authors evaluated the effects of doses of organic compost on the production and accumulation of macronutrients in endive plants in two areas with different fertility levels. The experiments were carried out at Fazenda Experimental São Manuel, located in the municipality of São Manuel, São Paulo State, Brazil. The study was carried out in a completely randomized design with seven treatments, six doses of organic compost (0, 35, 70, 105, 140 and 175 t/ha) and one additional treatment with inorganic fertilizer (N-P-K 4-14-8) and four replicates. In both areas, when the dose of organic compost was increased, the authors noticed a linear increase in fresh matter weight, number of leaves and plant height. In high-fertility area, compared to control...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cichorium endivia; Soil fertility; Plant nutrition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000400621

Yield and shelf life of chrysanthemum in response to the silicon application
Provedor de dados: 75
Autores: Carvalho-Zanão,Maristela P; Zanão Júnior,Luiz Antônio; Barbosa,José G; Grossi,José Antônio S; Ávila,Vinícius T de.
The potted chrysanthemum is one of the main flowers produced in protected cultivation. Silicon has promoted improvements both in quantitative and qualitative aspects when supplied to some ornamental species produced in these conditions. We evaluated the response of chrysanthemum cultivars grown in pots to the application of silicon. The experiment was conducted in a greenhouse of the Universidade Federal de Viçosa, Minas Gerais state, Brazil. Treatments were arranged in a 3x2 factorial scheme (three cultivars of chrysanthemum: Coral Charm, White Reagan and Indianapolis and two doses of silicon: 0 and 800 mg kg-1) with six replications, in an entirely randomized design. We evaluated the diameter of the flower buds and stems; length of the flower stems;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dendranthema grandiflora; Plant nutrition; Metasilicate.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000300008

Recomendacoes tecnicas para a cultura da soja na Regiao Central do Brasil.
Provedor de dados: 14
Autores: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR).
Solos e nutricao vegetal; Conservacao do solo; Correcao de solo e manutencao de fertilidade; Calagem; Qualidade do calcario e condicoes de uso; Correcao da acidez subsupercial; Adubacao em solos do Cerrado; Adubacao fosfatada; Adubacao potassica; Adubacao com micronutrientes; Adubacao foliar com macro e micronutrientes; Inoculacao; Plantas daninhas; Tecnologia de sementes; Estabelecimento de campo de semente; Colheita; Avaliacao; Manejo de pragas; Praticas culturais; Manejo do solo; Rotacao de culturas; Epoca de semeadura; Genetica e melhoramento; Fitopatologia.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Recomendacao tecnica; Adubacao fosfatada; Adubacao potassica; Planta daninha; Manejo de praga; Fitopatologia; Brasil; Soybean; Fertilizer; Seed; Inoculation; Weed; Genetic; Phytopathology; Pests management; Technical directions.; Adubação Foliar; Inoculação; Glycine Max; Genética; Melhoramento; Nutrição Vegetal; Pesquisa; Pratica Cultural; Semente; Soja; Solo.; Brazil; Crop management; Breeding; Plant nutrition; Soil.
Ano: 1991
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/447041

Avaliação agrotécnica dos seringais Marathon, São Francisco e Santana, situados no município de São Francisco do Pará: relatório técnico.
Provedor de dados: 14
Autores: PINHEIRO, E.; SILVA, H. M. e; VIEGAS, I. de J. M.; VALENTE, M. A.
bitstream/item/190735/1/FL-01567.pdf
Tipo: Outras publicações técnicas (INFOTECA-E)
Palavras-chave: Caracteristica agronomica; Sao Francisco do Pará; Pará; Brasil; Agronomic characters; Production data; Fisiologia Vegetal; Hevea Brasiliensis; Nutrição Vegetal; Produção; Seringueira; Solo; Amazonia; Plant nutrition; Plant physiology; Plant protection.
Ano: 1997
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375569

Adubação com micronutrientes no cerrado.
Provedor de dados: 14
Autores: RESENDE, A. V. de.
ABSTRACT: Micronutrients availability is na important constraint for crops in the Cerrado region, and its correction is always needed to obtaining economic yields. Old and new nutritional problems came with the agriculture expansion in Cerrado. Although being crucial for increasing the crop production, research efforts in this topic are far from being sufficient. A comprehensive review of the available knowledge on micronutrients management under Cerrado conditions is presented in this work.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Nutrient deficiences.; Adubação; Cerrado; Deficiência Nutricional; Fertilidade do Solo; Nutrição Vegetal; Solo.; Fertilizer application; Plant nutrition; Soil; Soil fertility.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/568036

Determinação do estado nutricional da pimenta-do-reino em Baião, PA através do sistema integrado de diagnose e recomendação (DRIS).
Provedor de dados: 14
Autores: OLIVEIRA, R. F. de; CRUZ, E. de S.; COSTA, A. N. da.
bitstream/item/32827/1/CPATU-BP208.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pimenta-do-reino; Baiao; Pará; Brasil.; Macroelemento; Microelemento; Nutrição Vegetal; Piper Nigrum.; Amazonia; Plant nutrition; Trace elements.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376608

Digestão de tecido vegetal em forno de micro-ondas via sistema aberto.
Provedor de dados: 14
Autores: OBARA, C. E.; MORENO, M.; OLIVEIRA, F. A.; OLIVEIRA JÚNIOR, A.; CASTRO, C.
bitstream/item/72356/1/ID-29940.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Concentração de nutrientes em amostras de tecido vegetal; Tecido vegetal; Adubação; Nutrição vegetal; Nutriente; Plant nutrition.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/574698

Aspectos nutricionais em pinhão-manso.
Provedor de dados: 14
Autores: KURIHARA, C. H.; LIMA FILHO, O. F. de; SILVA, C. J. da; KIKUTI, H.; BINOTTI, F. F. da S.
bitstream/item/203024/1/Livro-Pinhao-p.-204-227.pdf
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Pinhão manso; Matéria Seca; Nutrição Vegetal; Jatrofa; Dry matter content; Nutrition; Plant nutrition; Biodiesel.
Ano: 2019
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1113201

Normas DRIS multivariadas para avaliação do estado nutricional de Pimenta-Longa.
Provedor de dados: 14
Autores: WADT, P. G. S.; SILVA, L. M. da; CATANI, V.
O gênero Piper contém mais de mil espécies que se distribuem no sub-bosque e na vegetação secundária de ?orestas tropicais, principalmente na Ásia e América Tropical (WADT et al., 2004). Na Amazônia Sul-Ocidental o gênero Piper também é abundante, destacando-se entre as espécies conhecidas a pimenta-longa (P. hispidinervum), cujo principal produto comercial é o safrol. Sua produtividade depende da produção de biomassa, do teor de óleo essencial na biomassa e do teor de safrol no óleo essencial. Em condições naturais, a variabilidade do teor de safrol no óleo essencial é baixa, com coe? ciente de variação de 2,58% (MIRANDA, 2001). No outro extremo, a produção de biomassa tem variado sob diferentes condições experimentais de 799 kg ha-1 (SILVA et al., 2001)...
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Normas DRIS; Leaf analysis; Análisis foliar; Sistema integrado de formulación evaluación y monitoreo.; Análisis estadístico; Estatus nutricional; Fertilidad del suelo; Nutrición de las plantas; Nutrição vegetal; Pimenta longa; Piper hispidinervum; Estado nutricional; Análise foliar; Adubação; Fertilidade do solo; Análise estatística; Método estatístico; Plant nutrition; Nutritional status; Soil fertility; Statistical analysis; Diagnosis and Recommendation Integrated System.
Ano: 2012
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1004590

Metodologia de aplicação de microrganismos solubilizadores de fósforo em sementes visando melhor aproveitamento deste nutriente pelas plantas.
Provedor de dados: 14
Autores: OLIVEIRA, C. A. de; MARRIEL, I. E.; GOMES, E. A.; MATTOS, B. B.; SANTOS, F. C. dos; OLIVEIRA, M. C.; ALVES, V. M. C.
Uma das alternativas promissoras para a agricultura consiste na utilização de rochas naturais, que possuem baixas taxas de solubilização, mas que em associação com microrganismos do solo, denominados solubilizadores de fósforo (MSP), são capazes de suprir, mesmo que parcialmente, a demanda de fósforo (P) pelas plantas. Dentre os estudos de MSP em plantas, poucos se referem a métodos eficientes de aplicação em sementes ou estudos de veiculação/formulação para inoculantes. Neste sentido, o objetivo deste trabalho foi testar a metodologia mais adequada para a aplicação de bactérias solubilizadoras de P com base na avaliação do crescimento e nutrição de plantas de milheto. O delineamento experimental utilizado foi inteiramente casualizado, com quatro...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Soil microbiology; Millet.; Microbiologia do solo; Fósforo; Nutrição vegetal; Milheto; Soil biology; Plant nutrition; Phosphorus.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/975937

Aplicação de fertilizantes via fertirrigação.
Provedor de dados: 14
Autores: SILVA, D. J.
Fertirrigação e nutrição de plantas; Solubilidade dos fertilizantes; Compatibilidade dos fertilizantes; Efeito do fertilizantes no pH da solução e no pH do solo; Salinidade e potencial salino dos fertilizantes; Algumas características do fertilizantes.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Aplicação; Nutrição de planta; Tolerância; Resistance.; Irrigação; Fertilizante; Fertirrigação; Salinidade.; Fertigation; Fertilizer application; Irrigation; Plant nutrition; Salinity.
Ano: 2000
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/134003

Magnesium: management for the nutritional balance of soybean.
Provedor de dados: 14
Autores: CASTRO, C. de; OLIVEIRA JUNIOR, A. de; OLIVEIRA, F. A. de; FIRMANO, R. F.; ZANCANARO, L.; KLEPKER, D.; FOLONI, J. S. S.; BRIGHENTI, A. M.; BENITES, V. de M.
bitstream/item/223953/1/DOCUMENTO-438-online-1.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Soja; Magnésio; Eficiência Nutricional; Fertilidade do Solo; Soybeans; Plant nutrition; Soil fertility.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1132311

Faixas de suficiência para interpretação dos teores de nutrientes foliares em pimenta-longa (Piper hispidinervum) - primeira aproximação.
Provedor de dados: 14
Autores: WADT, P. G. S.; SILVA, L. M. da; CATANI, V.; FELISBERTO, F. A. V.
Neste trabalho são apresentadas indicações para a amostragem foliar e primeira aproximação para critérios de interpretação dos teores dos nutrientes em folhas de plantas de pimenta-longa.
Tipo: Circular Técnica (INFOTECA-E)
Palavras-chave: Leaf analysis; Análisis foliar; Faixa de suficiência; Primeira aproximação; Estatus nutricional; Nutrición de las plantas.; Piper hispidinervum.; Nutrição vegetal; Estado nutricional; Análise foliar; Pimenta longa; Piper longum.; Nutritional status; Plant nutrition.
Ano: 2012
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1039333

Determinação do fósforo remanescente para a avaliação da disponibilidade de fósforo em solos do Estado do Acre.
Provedor de dados: 14
Autores: WADT, P. G. S.; SILVA, L. M. da.
Dentre os 17 elementos essenciais à nutrição das plantas, o nitrogênio (N), fósforo (P) e potássio (K) são requeridos em maiores quantidades nas adubações. Em países de regiões tropicais, como o Brasil, o P é geralmente recomendado em maiores proporções nas adubações, devido aos processos de fixação desse elemento que ocorrem nos solos nessas regiões. A disponibilidade de fósforo às plantas tem sido avaliada por vários extratores químicos que quantificam o P em solução e uma fração variável do P-lábil do solo. Entretanto, a disponibilidade de P do solo é dependente do FCP, o qual apresenta estreita correlação com o P remanescente (quantidade do fósforo adicionado que fica na solução de equilíbrio após determinado tempo de contato com o solo, P-rem),...
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Interacciones suelo-plantas; Nutrientes del suelo.; Nutrición de las plantas; Fixação de fósforo; Química do solo; Adubação; Relação Solo-Planta; Nutrição vegetal; Fósforo.; Phosphorus; Plant nutrition; Soil-plant interactions.; Soil nutrients.
Ano: 2011
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/916454

Solos para todos: perguntas e respostas.
Provedor de dados: 14
Autores: BATISTA, M. de A.; PAIVA, D. W. de; MARCOLINO, A.
Estudo do solo; Fertilidade do solo e nutrição de plantas; Compostagem; Análises de solo e água.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Solo; Fertilidade do Solo; Nutrição Vegetal; Compostagem; Análise do Solo; Água; Soil fertility; Plant nutrition; Composting; Soil analysis; Water analysis.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1094046

Rochas moídas como fontes de potássio para o milho em solo de cerrado.
Provedor de dados: 14
Autores: RESENDE, A. V. de; MACHADO, C. T. T.; MARTINS, E. de S.; NASCIMENTO, M. T. do; SENA, M. C. de; SILVA, L. de C. R.; LINHARES, N. W.
RESUMO: Três rochas foram avaliadas quanto à capacidade de fornecer potássio para o crescimento inicial do milho, num Latossolo Vermelho-Amarelo argiloso, em condições de casa de vegetação. As rochas biotita xisto, brecha alcalina e ultramáfica alcalina foram moídas (&lt; 0,3 mm) e comparadas à fonte cloreto de potássio, nas doses de 50, 100 e 150 mg kg-1 de K. Uma testemunha sem K e a aplicação isolada das rochas constituíram tratamentos adicionais. Os resultados indicam que há pronta liberação de parte do potássio das rochas, suficiente para atender a demanda das plantas de milho. O extrator Mehlich 1 mostra boa eficiência na predição da disponibilidade de potássio no solo, após a aplicação das rochas. A ultramáfica se destaca por apresentar maior...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Fertilizante alternativo; Rock; Alternative fertilizer.; Adubação; Condicionador do Solo; Milho; Nutrição Vegetal; Potássio; Rocha; Solo; Zea Mays.; Fertilizer application; Potassium; Plant nutrition; Soil; Soil conditioners.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567446

Diagnóstico nutricional de uma lavoura de soja com base em dados georreferenciados.
Provedor de dados: 14
Autores: KRAHL, L. L.; RESENDE, A. V.; SHIRATSUCHI, L. S.; DOWICH, I.
bitstream/CPAC-2009/26889/1/p2005_65.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Georreferenciamento; Geoprocessing.; Glycine Max; Nutrição Vegetal; Soja.; Plant nutrition; Soybeans.
Ano: 2006
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/569496

Utilização do sistema integrado de diagnose e recomendação (DRIS) na determinação do estado nutricional da pimenta-do-reino em Paragominas, PA.
Provedor de dados: 14
Autores: OLIVEIRA, R. F. de; CRUZ, E. de S.; COSTA, A. N. da.
bitstream/item/48883/1/Boletim-Pesquisa-191-CPATU.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pimenta-do-reino; Paragominas; Pará; Brasil.; Adubação; Nutrição Vegetal; Produtividade.; Piper Nigrum; Amazonia; Fertilizer application; Plant nutrition; Yields.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376589

Interação de micorriza vesicular-arbuscular com leguminosas em solos ácidos.
Provedor de dados: 14
Autores: LOCATELLI, M.; SMYTH, T. J.; VIEIRA, A. H.
Este trabalho apresenta uma abordagem para MVA e acidez do solo; Simbiose MVA ? Rhizobium-leguminosa; Dependência de MVA e Micorrizas e pesquisa na região amazônica.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Crescimento da planta.; Leguminosa; Simbiose; Raiz; Fungo; Micorriza Vesicular Arbuscular; Nutrição Vegetal; Acidez do Solo.; Plant nutrition; Plant growth; Symbiosis; Vesicular arbuscular mycorrhizae.; Legumes; Soil pH.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/703811

Nutrição e adubação da seringueira no Acre.
Provedor de dados: 14
Autores: FERREIRA, R. R. M.; PEREIRA, J. B. M.
Este capítulo aborda a adubação da seringueira que, quando bem conduzida possibilita ganhos significativos de produtividade na maioria das plantas cultivadas. É um fator de produção que pode ser manejado com baixo custo de investimento, porém, precisa ser conduzida tecnicamente para evitar uso desnecessário de determinados nutrientes que podem, em certos casos, até reduzir a produtividade.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Rubber tree; Árbol de goma; Nutrición de las plantas; Fertilizantes; Seringueira; Hevea Brasiliensis; Nutrição Vegetal; Adubação; Performance; Plant nutrition; Fertilizers.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1133423

Diagnose foliar e recomendação de adubação para lavouras comerciais.
Provedor de dados: 14
Autores: WADT, P. G. S.
A pesquisa agropecuária brasileira tem proporcionado, nos últimos 20 anos, importantes avanços no desenvolvimento de técnicas de avaliação do estado nutricional das plantas para o manejo dos sistemas de adubação. Essas técnicas possibilitam uma nova abordagem para o desenvolvimento de sistemas de recomendação de adubação de nutrientes destinados às culturas agrícolas, nos quais o monitoramento nutricional passa a ser um fator decisivo, substituindo a necessidade de condução de ensaios de calibração de adubação por longos períodos e em diferentes locais. Este trabalho apresenta o referencial teórico e prático relacionado ao método do potencial de resposta à adubação, o qual permite utilizar a interpretação do estado nutricional das lavouras na recomendação...
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Lavoura comercial; Leaf analysis; Análisis foliar; Normas DRIS; Rendimiento de los cultivos; Sistema integrado de formulación evaluación y monitoreo.; Análisis estadístico; Explotación de venta directa; Fertilidad del suelo; Fertilizantes; Nutrición de las plantas; Nutrição vegetal; Lavoura; Estado nutricional; Análise foliar; Adubação; Fertilidade do solo; Rendimento; Análise estatística; Método estatístico; Plant nutrition; Commercial farms; Crop yield; Fertilizers; Soil fertility; Statistical analysis; Diagnosis and Recommendation Integrated System.
Ano: 2012
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/993571

Efeito da adubação NPK na nutrição e produtividade de pimenta-do-reino, no município de Tomé-Açu, PA.
Provedor de dados: 14
Autores: OLIVEIRA, R. F. de; CRUZ, E. de S.
bitstream/item/42027/1/BolPesquisa32.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Pimenta-do-reino; Ramae arraia; Tome-Acu; Pará; Brasil.; Adubação; Nutrição Vegetal; Npk; Produtividade.; Piper Nigrum; Amazonia; Fertilizer application; Plant nutrition; Yields.
Ano: 2001
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/382712

Guia prático para aplicação do método da diagnose da composição nutricional (CND): exemplo de uso na cultura da cana-de-açúcar.
Provedor de dados: 14
Autores: TRASPADINI, E. I. F.; PRADO, R. M.; VAZ, G. J.; SILVA, F. C. da; MANCINI, A. L.; SILVA, G. P. da; SANTOS, E. H. dos; WADT, P. G. S.
Interpretação do estado nutricional. O cálculo do método CND. Média geométrica. Relação multivariada. Norma CND. Índice CND. Potencial de Resposta da planta a Adubação (PRA). Guia para cálculo e interpretação do estado nutricional da planta. Organização dos dados. Média da produtividade e classe produtiva. Cálculo do componente R. Média geométrica. Relação multivariada dos nutrientes. Relação multivariada dos nutrientes. Norma CND. Interpretação do Estado Nutricional. Exemplo de Interpretação do Estado Nutricional.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Nutrição Vegetal; Cana de Açúcar; Disease diagnosis; Plant nutrition; Sugarcane.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1103108

Exigências nutricionais e adubação do milho safrinha.
Provedor de dados: 14
Autores: COELHO, A. M.
bitstream/item/94712/1/Exigencias-nutricionais.pdf
Tipo: Artigo de divulgação na mídia (INFOTECA-E)
Palavras-chave: Zea mays; Nutriente; Nutrição vegetal; Nutrients; Plant nutrition; Fertilizer application.
Ano: 2013
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/974963

Estado nutricional dos solos e cafeeiros da região das Matas de Minas.
Provedor de dados: 14
Autores: FERREIRA, W. P. M.; PEDROSA, A. W.; RIBEIRO, M. de F.; PICOLI, E. A. de T.; MAY, A.; DONZELES, S. M. L.
Principal produto do agronegócio do estado Minas Gerais, o café é cultivado em diferentes sistemas de produção. Em razão das diferentes tecnologias adotadas pelos cafeicultores, informações provenientes de pesquisas tornam-se fundamentais para dar suporte à obtenção de produção economicamente viável e sustentável. Assim, este documento fruto de ampla pesquisa, oferece ao produtor informações corretas sobre a realidade e a importância do estado nutricional dos solos e dos cafeeiros cultivados na região das Matas de Minas, que é a segunda maior produtora de café no Estado.
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Manejo do Solo; Fertilidade do Solo; Nutrição; Sistema de Produção; Café; Análise Foliar; Soil management; Soil fertility; Plant nutrition; Coffea.
Ano: 2021
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1136620

Amostragem para análise foliar de videira.
Provedor de dados: 14
Autores: SILVA, D. J.; FARIA, C. M. B. de.
A análise foliar, utilizada em complemento à análise de solo, constituí-se um um importante instrumento de controle da nutrição mineral das plantas. Apresentamos critérios para a amostragem do tecido vegetal.
Tipo: Folhetos
Palavras-chave: Videira; Nutrição mineral; Uva; Análise Foliar; Nutrição Vegetal; Grapes; Plant nutrition.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/154374

Cátions trocáveis e controle da acidez em latossolo argiloso sob sistemas de manejo e de produção de algodão, milho e soja.
Provedor de dados: 14
Autores: FERREIRA, A. C. de B.; BORIN, A. L. D. C.; LAMAS, F. M.; FERREIRA, G. B.; RESENDE, A. V. de.
O Cerrado brasileiro, em geral, são naturalmente ácidos e intemperizados, apresentando níveis tóxicos de alumínio (Al3+), baixos níveis de saturação por bases trocáveis, baixa capacidade de troca de cátions (CTC) e reduzidos teores de matéria orgânica, além de reduzida disponibilidade de nutrientes, com exceção de ferro e manganês (Lopes; Guilherme, 2016). Não obstante essas características, são solos profundos, com condições favoráveis à mecanização e respondem às correções químicas, viabilizando a produção agrícola rentável. A região do Cerrado contribui em grande proporção para a produção nacional de soja, de milho e de quase todo algodão (98%) produzido no País (Conab, 2021). Mas, para que isso acontecesse, os solos precisaram ser corrigidos...
Tipo: Folhetos
Palavras-chave: Algodão; Milho; Soja; Cerrado; Nutrição Vegetal; Acidez do Solo; Produção Agrícola; Fibra; Manejo do Solo; Latossolo; Cotton; Soybean products; Corn meal; Vegetable products; Plant nutrition; Fiber quality; Acid soils; Soil management.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1146572

Organic fertilizer and humic substance effects on lettuce characteristics and nutrition.
Provedor de dados: 14
Autores: MARCHI, E. C. S.; MARCHI, G.; SILVA, C. A.
bitstream/item/78291/1/p2009-087.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Adubação orgânica; Adubação mineral; Organic fertilizer.; Alface; Calagem; Condicionador do Solo; Nutrição Vegetal.; Lettuce; Liming; Mineral fertilizers; Plant nutrition; Soil conditioners.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/898304

Doses de N, P e K na nutrição e no crescimento de mudas de dendezeiro.
Provedor de dados: 14
Autores: BOTELHO, S. M.; VIEGAS, I. de J. M.; SHU, E. Y.
bitstream/item/32788/1/CPATU-BP193.pdf
Tipo: Séries anteriores (INFOTECA-E)
Palavras-chave: Adubacao NPK; Tailandia; Pará; Brasil; Oil palms; Growth.; Dendê; Crescimento; Elaeis Guineensis; Muda; Nutrição Vegetal.; Amazonia; Fertilizer application; Plant nutrition; Seedlings.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376630

Magnésio: manejo para o equilíbrio nutricional da soja.
Provedor de dados: 14
Autores: CASTRO, C. de; OLIVEIRA JUNIOR, A. de; OLIVEIRA, F. A. de; FIRMANO, R. F.; ZANCANARO, L.; KLEPKER, D.; FOLONI, J. S. S.; BRIGHENTI, A. M.; BENITES, V. de M.
bitstream/item/224430/1/DOCUMENTO-430-online.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Soja; Magnésio; Eficiência Nutricional; Soybeans; Plant nutrition.
Ano: 2020
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1125328

Nutrição e adubação.
Provedor de dados: 14
Autores: SILVA, D. J.; QUAGGIO, J. A.; PINTO, P. A. da C.; PINTO, A. C. de Q.; MAGALHÃES, A. F. de J.
Trata sobre a nutrição e adubação da mangueira: nutrientes essenciais e sintomas de deficiência; remoção de nutrientes; avaliação do estado nutricional; análise de solo; análise de folhas; calagem e adubação; interação entre nutrição mineral e qualidade dos frutos.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Nutrição de planta; Fertilizer applications; Adubação; Manga; Mangoes; Plant nutrition.
Ano: 2002
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/137726

Effects of cover crops species on Passiflora edulis nutrition.
Provedor de dados: 14
Autores: ANDRADE, L. R. M. de; CARVALHO, A. M. de; MENDES, I. de C.; VIVALDI, L.; KARIA, C. T.; JUNQUEIRA, N. T. V.
bitstream/CPAC-2009/24338/1/p2002_48.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cover plants.; Enzima; Maracujá; Nutrição Vegetal; Planta de Cobertura; Produtividade; Solo.; Crop yield; Enzymes; Plant nutrition; Soil.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567640

Nutrição e adubação: conceitos e aplicações na formação de mudas de pimenta longa.
Provedor de dados: 14
Autores: BRASIL, E. C.; VIEGAS, I. de J. M.; SILVA, E. S. A.; GATO, R. F.
bitstream/item/61763/1/Oriental-Doc13.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Formação de muda; Piper hispidinervium; Pará; Brasil; Mineral nutrients.; Adubação; Nutrição Vegetal; Pimenta Longa.; Nutriente Mineral; Amazonia; Fertilizer application; Plant nutrition; Seedlings.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/377441

Parametros cineticos de absorcao de fosforo e caracteristicas morfologicas do sistema radicular de variedades de milho.
Provedor de dados: 14
Autores: MACHADO, C. T. de T.; FURLANI, A. M. C.
bitstream/CPAC-2009/24168/1/p2002_55.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Maize.; Fósforo; Fisiologia Vegetal; Morfologia Vegetal; Milho; Nutrição Vegetal; Variedade; Zea Mays.; Plant nutrition; Plant physiology; Phosphorus; Plant anatomy; Varieties.
Ano: 2004
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/567477

Diagnóstico da citricultura na microrregião do Guamá, PA.
Provedor de dados: 14
Autores: VELOSO, C. A. C.; BRASIL, E. C.; MENDES, F. A. T.; SILVA, A. de B.; TRINDADE, D. R.
bitstream/item/61865/1/Oriental-Doc24.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Microrregião do Guamá; Pará; Brasil; Cultural methods.; Adubação; Citricultura; Fertilidade do Solo; Fruta Cítrica; Nutrição Vegetal; Sistema de Produção.; Amazonia; Fertilizer application; Citrus fruits; Plant nutrition; Soil fertility.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/375391

Acúmulo de nutrientes em cana-de-açúcar cultivada em diferentes locais do Cerrado (2009).
Provedor de dados: 14
Autores: MULLER, J. A.; CARGNIN, A.; REIN, T. A.; MELLO, F. D. A.; FOGAÇA, C. M.; PIERDONÁ, R.
bitstream/item/78059/1/p2009-002.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cana-de-açúcar; Saccharum officianrum; Savanna.; Cerrado; Npk.; Plant nutrition; Sugarcane.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/747776

Nutrição mineral.
Provedor de dados: 14
Autores: SILVA, D. J.
Introdução; Aspectos gerais da nutrição: nitrogênio, fósforo, potássio, cálcio, magnésio, enxofre, boro, cobre, ferro, manganês, zinco, molibdênio, cloro; Avaliação do estado nutricional; Amostragem e análise de solo; Amostragem e análise de planta; Calagem; Adubação: adubação de plantio, adubação de crescimento; adubação de produção; Irrigação e fertirrigação.
Tipo: Capítulo em livro técnico (INFOTECA-E)
Palavras-chave: Videira; Nutrição mineral; Adubação de plantio; Uva; Solo; Nutrição; Calagem; Adubação; Irrigação; Fertirrigação; Grapes; Plant nutrition; Irrigation; Fertigation; Nitrogen.
Ano: 2017
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1082017

Manual de coleta de amostras de folhas de pimenta-do-reino para diagnose nutricional.
Provedor de dados: 14
Autores: OLIVEIRA, R. F. de; CRUZ, E. de S.
bitstream/item/61767/1/Oriental-Doc19.pdf
Tipo: Documentos (INFOTECA-E)
Palavras-chave: Pimenta-do-reino; Piper nigrun; Pará; Brasil; Plant soil relations.; Análise Foliar; Nutrição Vegetal; Relação Solo-Planta.; Amazonia; Leaves; Plant nutrition; Tissue analysis.
Ano: 1999
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/376566

Avaliação do protocolo do LQAS da Embrapa Cerrados para análise da disponibilidade de metais em solos ultramáficos, determinados pelo método DTPA (2009).
Provedor de dados: 14
Autores: BONFIM, L. dos S.; MUNIZ, D. H. de F.; ANDRADE, L. R. M. de; AQUINO, F. de G.
bitstream/item/78068/1/p2009-010.pdf
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Química dos solos; Metais; Micronutrients; Assessment laboratory protocol.; Laboratório.; Plant nutrition; Soil; Soil chemistry.
Ano: 2009
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/736943

Nutrition phosphoree chez Chondrus crispus (Rhodophycees)
Provedor de dados: 5
Autores: Chopin, T; Floc'H, J; Bodeau, B; Penot, M.
Phosphorated nutrition of the red alga Chondrus crispus Stackh. is studied is two morphologically very dissimilar forms of the thallus. Phosphorus measurements, which were monthly carried out at different parts of the alga, showed first that the distribution of this element is not homogeneous along the thallus, and second that seasonal variations occur. It is suggested that the classical polymorphism of the species can be taken into account as concerns its physiology. Besides, from absorption and exsorption experiments which were performed with super(32)P as a tracer, it is shown that the high concentration factor of phosphorus in the alga as compared to the environmental seawater (up to 17.9 x 10 super(4)) can be explained as an effect of metabolic process.
Tipo: Text
Palavras-chave: Chondrus crispus; Algae; Distribution; Metabolism; Seasonal variations; Food absorption; Phosphorus; Plant nutrition.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1175.pdf

MECHANISMS AND PRACTICAL CONSIDERATIONS INVOLVED IN PLANT GROWTH PROMOTION BY RHIZOBACTERIA
Provedor de dados: 126
Autores: Martínez-Viveros,O; Jorquera,M.A; Crowley,D.E; Gajardo,G; Mora,M.L.
Rhizobacteria are capable of stimulating plant growth through a variety of mechanisms that include improvement of plant nutrition, production and regulation of phytohormones, and suppression of disease causing organisms. While considerable research has demonstrated their potential utility, the successful application of plant growth promoting rhizobacteria (PGPR) in the field has been limited by a lack of knowledge of ecological factors that determine their survival and activity in the plant rhizosphere. To be effective, PGPR must maintain a critical population density of active cells. Inoculation with PGPR strains can temporarily enhance the population size, but inoculants often have poor survival and compete with indigenous bacteria for available growth...
Tipo: Journal article
Palavras-chave: Agricultural inoculant; Phytohormone; Phytopathogen biocontrol; Plant nutrition; Rhizosphere.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000100006

Variation of SPAD Chlorophyll Meter Readings (SCMR) in the mini-core germplasm collection of chickpea
Provedor de dados: 30
Autores: Kashiwagi, J.
Palavras-chave: Chlorophylls; Chickpeas; Genotypes; Transpiration (animals); Germplasm; Germplasm collections; Harvest index; Leaf area; Drought resistance; Plant nutrition.
Ano: 2006
URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3183

Qualidade de mudas de moringa sob diferentes níveis de nutrientes aplicados via fertirrigação
Provedor de dados: 190
Autores: Pereira, Kleane Targino Oliveira; Oliveira, Francisco de Assis de; Cavalcante, Antonio Lucieudo Gonçalves; Dantas, Renata de Paiva; Oliveira, Mychelle Karla Teixeira de; Costa, Jessilanne Plínia Barbosa de Medeiros.
O objetivo do presente trabalho foi avaliar a qualidade de mudas de moringa em função da posição das sementes no fruto e da concentração de nutrientes na solução de fertirrigação. Realizou-se um experimento seguindo o delineamento inteiramente casualizado, com os tratamentos arranjados em esquema fatorial 3 x 4, sendo três posições de sementes no fruto (basal, mediana e apical) e quatro doses de nutrientes (0, 50, 100 e 150% da dose padrão), com quatro repetições. Foram avaliados os seguintes parâmetros: altura (ALT), diâmetro do coleto (DC), número de folhas, matéria seca da parte aérea (MSPA), matéria seca do sistema radicular (MSSR) e matéria seca total, relação ALT/DC, MSPA/MSSR e índice de qualidade de Dickson. Os dados foram submetidos à análise de...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Engenharia Florestal  Produção de mudas Moringa oleifera; Nutrição vegetal; Silvicultura Moringa oleifera; Plant nutrition; Silviculture.
Ano: 2016
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1038

Residual effects of superficial liming on tropical soil under no-tillage system
Provedor de dados: 86
Autores: Costa,Claudio Hideo Martins da; Crusciol,Carlos Alexandre Costa; Ferrari Neto,Jayme; Castro,Gustavo Spadotti Amaral.
Abstract The objective of this work was to evaluate the long-term effects of the surface application of lime on soil fertility and on the mineral nutrition and grain yield of soybean, and of black oat and sorghum in crop succession. The experiment was carried out on a clayey Oxisol, in a randomized complete block design, with four replicates. Treatments consisted of lime the rates of 0, 1,000, 2,000, and 4,000 kg ha-1, applied in October 2002 and November 2004. Soil samples were collected at five soil layers, down to 0.60-m depth. Surface liming was effective in reducing soil acidity and increasing Ca2+ and Mg2+ contents in the subsurface. Moreover, it increased available phosphorus contents and soil organic matter in the long term (48 to 60 months after...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop rotation; Long-term experiment; Plant nutrition; Soil fertility; Subsurface soil acidity; Yield components.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016000901633

DRIS norms for 'Valencia' sweet orange on three rootstocks
Provedor de dados: 86
Autores: Mourão Filho,Francisco de Assis Alves; Azevedo,João Carlos.
Diagnosis and Recommendation Integrated System (DRIS) applies nutrient ratios instead of the isolated concentration values of each nutrient in interpretation of tissue analysis. The objectives of this research were to establish adequate DRIS norms for 'Valencia' sweet orange irrigated commercial groves budded on three rootstocks and correlate indexes of nutrition balance with yield. Experiments were conducted in São Paulo State, Brazil. Rootstocks Rangpur lime, Caipira sweet orange, and Poncirus trifoliata, with more than six years old and yield above 40 ton ha-1 were utilized. Data referred to yield, tree spacing, rootstock and foliar concentrations of N, P, K, Ca, Mg, S, Fe, Mn, Cu, Zn, and B in non fruiting terminals for each grove were processed for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus; Foliar diagnosis; Nutrient balance; Plant nutrition.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000100012

Nitrogen efficiency indexes for evaluating nitrogen uptake and use in ornamental bromeliad’s root system and tank
Provedor de dados: 86
Autores: Silva,Karina Gonçalves da; Ferreira,Mauricio Lamano; Silva,Emerson Alves da; Kanashiro,Shoey; Camargo,Plínio Barbosa de; Tavares,Armando Reis.
Abstract: The objective of this work was to evaluate if nitrogen use efficiency (NUE) indexes can elucidate functional differences in nutrient uptake between the root system and tank of epiphytic bromeliads. The bromeliads Guzmania lingulata and Vriesea 'Harmony' received fertilizers in their tanks or through their roots using modified Hoagland &amp; Arnon solution, with 0.00, 2.62, or 5.34 mmol L-1 nitrogen, as urea. After 90 days, nitrogen contents in leaves and plant biomass were evaluated, and NUE indexes were calculated. Guzmania lingulata and V. 'Harmony' fertilized in their tanks with 5.34 mmol L-1 had the highest averages of nitrogen uptake efficiency and recovery efficiency; those fertilized with 2.62 mmol L-1 through their roots showed the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Guzmania lingulata; Vriesea; Bromeliaceae; Nutritional efficiency index; Plant nutrition; Root functionality.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000600703

Corn agronomic traits and recovery of nitrogen from fertilizer during crop season and off-season
Provedor de dados: 86
Autores: Fuentes,Luis Felipe Garcia; Souza,Luiz Carlos Ferreira de; Serra,Ademar Pereira; Rech,Jerusa; Vitorino,Antonio Carlos Tadeu.
Abstract: The objective of this work was to evaluate corn agronomic traits in a cultivation subjected to different N rates, during the fall-winter (off-season) and spring-summer crop seasons, and N recovery from fertilizer. The experiment was set up in a randomized complete block design with four replicates, in a 5x2 factorial arrangement, with the following treatments: five N topdressing rates - 0, 30, 60, 90, and 120 kg ha-1 -, using urea as source; and two crop seasons, fall-winter and spring-summer. The following variables were determined: plant height, height of the first ear insertion, number of grains per ear, diameter and length of ear, 1,000-grain weight, N concentration in the leaves and grains, grain-protein concentration, grain yield, N...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; N-fertilizer management; Plant nutrition; Soil fertility; Soil-N supply.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018001001158

Potato crop growth as affected by nitrogen and plant density
Provedor de dados: 86
Autores: OLIVEIRA,CARLOS ALBERTO DA SILVA.
Growth and development variables and dry matter characteristics were studied for cultivar Snowden of potato (Solanum tuberosum L.) to evaluate nitrogen and plant density influence. Disregarding ending of season plant stress, the average number of actives haulms per plant was five and it was not affected by plant spacing. However, seasonal and final number of active haulms per plant were increased at 200 kg/ha of nitrogen. Maximum stem elongation was reached quickly with double density and had the tendency to keep constant at the highest and lowest nitrogen levels after 70 days after planting. Specific stem mass defined as mass per unit stem length was established as an indirect measure of stem thickness and load capacity. Specific leaf mass position in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Snowden cultivar; Plant nutrition; Canopy; Leaf area; Tubers; Stems; Dry matter; Plant population.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000500011

Potassium supply to cotton roots as affected by potassium fertilization and liming
Provedor de dados: 86
Autores: Rosolem,Ciro Antonio; Silva,Rosemeire Helena da; Esteves,José Antonio de Fátima.
Cotton (Gossypium hirsutum) is known to have a high requirement for K and to be very sensitive to low soil pH. Most of K reaches plant roots by diffusion in the soil. As K interacts with Ca and Mg, liming can interfere in K movement in the soil, affecting eventually the plant nutrition. The objective of this work was to study the effect of dolomitic lime and 0, 15, 30, 45 and 60 g kg-1 of K on the supply of K to cotton roots. Cotton plants were grown up to 40 days in 5 L pots containing a Dark Red Latosol (Typic Haplusthox) with 68% and 16% of sand and clay, respectively. There was an increase in dry matter yields and in K accumulation due to K fertilization. Root interception of soil K was also increased by K application, but was not affected by lime....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gossypium hirsutum; Mass; Diffusion; Liming materials; Roots; Growth; Plant nutrition.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2003000500012

A Meta-Analysis of the Impact of Foliar Feeding of Micronutrients on Productivity and Revenue Generation of Forage Crops
Provedor de dados: 87
Autores: IQBAL,M.A.; ABDUL,H.; MUZAMMIL,H.S.; IMTIAZ,H.; TANVEER,A.; SAIRA,I.; ANSER,A.
ABSTRACT: Food security assurance to meet the demands of increased population growth requires a proportional increase in milk and meat production which, in turn, depends on animal nutrition. Assessing foliar application of micronutrients for production of substantive quantities of good quality forage must be a goal of modern, profit-oriented, sustainable agriculture and plants with better competitive ability as compared to weeds. This meta-analysis made a quantitative and qualitative analysis of the impact of foliar feeding of micronutrients (iron, zinc, copper, sulfur and boron) on forage crops under varying pedo-climatic conditions. Weighted and unweighted meta-analyses were performed on 139 studies to evaluate 19 independent variables (9 qualitative, 5...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Economic returns; Plant nutrition; Sprays; Weighted meta-analysis; Zinc.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100245

NUTRIENT RECOMMENDATION MODEL FOR CARROT CROP – FERTICALC CARROT
Provedor de dados: 90
Autores: Dezordi,Luciel Rauni; Aquino,Leonardo Angelo de; Novais,Roberto Ferreira; Aquino,Priscila Maria de; Santos,Luiz Paulo Dornelas dos.
ABSTRACT The literature on fertilization for carrot growing usually recommends nutrient application rates for yield expectations lower than the yields currently obtained. Moreover, the recommendation only considers the results of soil chemical analysis and does not include effects such as crop residues or variations in yield levels. The aim of this study was to propose a fertilizer recommendation system for carrot cultivation (FERTICALC Carrot) which includes consideration of the nutrient supply by crop residues, variation in intended yield, soil chemical properties, and the growing season (winter or summer). To obtain the data necessary for modeling nutritional requirements, 210 carrot production stands were sampled in the region of Alto Paranaíba, State...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutrient balance; Daucus carota L.; Plant nutrition.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601714

Efficiency of nitrogen fertilizer applied at corn sowing in contrasting growing seasons in Paraguay
Provedor de dados: 90
Autores: Amado,Telmo Jorge Carneiro; Hahn Villalba,Enrique Oswin; Bortolotto,Rafael Pivotto; Santi,Antônio Luis; Benítez León,Enrique Asterio; Menefee,Dorothy; Kunz,Junior.
In order to select soil management practices that increase the nitrogen-use efficiency (NUE) in agro-ecosystems, the different indices of agronomic fertilizer efficiency must be evaluated under varied weather conditions. This study assessed the NUE indices in no-till corn in southern Paraguay. Nitrogen fertilizer rates from 0 to 180 kg ha-1 were applied in a single application at corn sowing and the crop response investigated in two growing seasons (2010 and 2011). The experimental design was a randomized block with three replications. Based on the data of grain yield, dry matter, and N uptake, the following fertilizer indices were assessed: agronomic N-use efficiency (ANE), apparent N recovery efficiency (NRE), N physiological efficiency (NPE), partial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Plant nutrition; No-tillage; Soil fertility.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000600020

Assessing the Content of Micronutrients in Soils and Sugarcane in Different Pedogeological Contexts of Northeastern Brazil
Provedor de dados: 90
Autores: Silva,Rita de Cássia Ferreira da; Silva,Fernando Bruno Vieira da; Biondi,Caroline Miranda; Nascimento,Clístenes Williams Araújo do; Oliveira,Emídio Cantídio Almeida de.
ABSTRACT Micronutrient research for sugarcane in northeastern Brazil is scarce and most works on this issue date back to the 70’s and 80’s. The objectives of this study were to assess the available and reserve pools of Fe, Mn, Cu, and Zn in soils cultivated with sugarcane under three geological contexts in northeastern Brazil as well as to diagnose the micronutrient nutritional status of sugarcane grown on these areas in order to identify pedogeological conditions in which micronutrient deficiencies are likely. Results showed that the soils cultivated with sugarcane in the states of Paraíba and Pernambuco posed available and reserve contents of micronutrients related to the parent materials and soil textural classes. The reserve contents of Fe, Mn, Zn, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil fertility; Trace elements; Plant nutrition; Critical levels.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100522

Cover Crops and Nitrogen Fertilization Effects on Nitrogen Soil Fractions under Corn Cultivation in a No-Tillage System
Provedor de dados: 90
Autores: Veras,Márcia de Sousa; Ramos,Maria Lucrécia Gerosa; Oliveira,Daiana Nara Santos; Figueiredo,Cícero Célio de; Carvalho,Arminda Moreira de; Pulrolnik,Karina; Souza,Kleberson Worslley de.
ABSTRACT The use of cover crops has recently increased and represents an essential practice for the sustainability of no-tillage systems in the Cerrado region. However, there is little information on the effects of nitrogen fertilization and cover crop use on nitrogen soil fractions. This study assessed changes in the N forms in soil cropped to cover crops prior to corn growing. The experiment consisted of a randomized complete block design arranged in split-plots with three replications. Cover crops were tested in the plots, and the N topdressing fertilization was assessed in the subplots. The following cover species were planted in succession to corn for eight years: Urochloa ruziziensis, Canavalia brasiliensis M. ex Benth, Cajanus cajan (L.) Millsp, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Soil management; Plant nutrition; Fertilization and nutrition of annual crops.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100508

Crop Yield Responses to Sulfur Fertilization in Brazilian No-Till Soils: a Systematic Review
Provedor de dados: 90
Autores: Pias,Osmar Henrique de Castro; Tiecher,Tales; Cherubin,Maurício Roberto; Mazurana,Michael; Bayer,Cimélio.
ABSTRACT Sulfur (S) fertilization recommendations for grain crops in Brazil were formerly established from studies on crops with a low yield potential grown on soils under conventional tillage (CT). However, the subsequent adoption of no-tillage (NT) altered S dynamics in the soil, making it necessary to carefully evaluate the applicability of these S fertilizer recommendations. In addition, the emergence of modern high-yield-potential genotypes, the successive application of concentrated low-sulfur fertilizers, and reduction in S atmospheric deposition have raised the likelihood of positive responses of crops to S fertilization. Available literature reports contrasting crop responses to S fertilization in Brazilian soils, ranging from substantial gains to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sulfur fertilizer rate; Available SO42--S content; Climate zone; Plant nutrition; Sustainable fertilizer management.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100506

Brachiaria sp yield and nutrient contents after nitrogen and sulphur fertilization
Provedor de dados: 90
Autores: Heinrichs,Reges; Grano,Fernanda Grecco; Bueno,Leda Gobbo de Freitas; Soares Filho,Cecílio Viega; Fagundes,Jailson Lara; Rebonatti,Melina Daniel; Oliveira,Katia de.
Among the production factors, adequate fertilization is an important tool to raise the productivity of pastoral systems and consequently increase the share of Brazil in the supply chain of primary agricultural products at the global level. The objective of this study was to evaluate the interaction of nitrogen and sulfur fertilization in BRACHIARIA DECUMBENS: Stapf. The experiment in pots with Dystrophic Oxisol was evaluated in a completely randomized design with four replications in a 5 x 3 factorial arrangement, involving five N doses (0, 100, 200, 400, and 800 mg dm-3) in the form of ammonium nitrate and three S doses (0, 20 and 80 mg dm-3) in the form of calcium sulfate, with a total of 15 treatments. In the treatments with low S dose, calcium was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertilization; Brachiaria decumbens; Plant nutrition; Forage plants.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400017

Effects of nickel and nitrogen soil fertilization on lettuce growth and urease activity
Provedor de dados: 90
Autores: Oliveira,Thomas Carlos; Fontes,Renildes Lúcio Ferreira; Rezende,Sebastião Tavares de; Víctor Hugo,Alvarez V.
Nickel is a micronutrient involved in nitrogen metabolism and a constituent of the urease molecule. Plant growth and urease activity were evaluated in lettuce (Lactuca sativa L.) grown in soil-filled pots in a 2 x 8 factorial design with two nitrogen (N) sources and eight Ni rates, with five replications. Nitrogen was applied at 200 mg dm-3 (half the dose incorporated into the soil at seedling transplanting and half top-dressed later) using the sources NH4NO3 (AN) and CO(NH2)2 (Ur). The Ni treatments (0, 2, 4, 8, 12, 16, 24 and 32 mg dm-3) were applied as NiCl2. The shoot dry-matter yield, leaf urease activity, Ni levels in the lettuce leaves and Ni levels extracted from soil with Mehlich-3 (M-3) and DTPA were determined. In the plants supplied with AN,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ammonium nitrate; Urea; Plant nutrition; Lactuca sativa L.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000300016

The Use of DRIS for Nutritional Diagnosis in Oil Palm in the State of Pará
Provedor de dados: 90
Autores: Matos,Gilson Sergio Bastos de; Fernandes,Antonio Rodrigues; Wadt,Paulo Guilherme Salvador; Pina,Antônio José de Abreu; Franzini,Vinícius Ide; Ramos,Helen Monique Nascimento.
ABSTRACT The oil palm crop has expanded significantly in the state of Pará, which has not been followed in a proportional manner by studies aiming at increasing yield through plant nutrition. The objective of this study was to evaluate general and specific norms of the Diagnosis and Recommendation Integrated System (DRIS) for genetic materials of oil palm (African and interspecific hybrid) at two ages (young and adult plants) and evaluate possible deficiencies in fertilization and soil correction practices. The DRIS norms were composed of means, standard deviations, and coefficients of variation of bivariate, specific, and general relationships among nutrients of 144 leaf samples. The DRIS norms specific for genetic material did not differ from the general...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Elaeis guineensis Jacq.; E. oleifera × E. guineensis; Eastern Amazonia; Plant nutrition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100510

Growth and Nutrition of Eucalypt Rooted Cuttings Promoted by Ectomycorrhizal Fungi in Commercial Nurseries
Provedor de dados: 90
Autores: Gandini,Andrezza Mara Martins; Grazziotti,Paulo Henrique; Rossi,Márcio José; Grazziotti,Danielle Cristina Fonseca Santos; Gandini,Elizzandra Marta Martins; Silva,Enilson de Barros; Ragonezi,Carla.
ABSTRACT Ectomycorrhizal fungi (EMF) may improve the adaptation of eucalypts saplings to field conditions and allow more efficient fertilizer use. The effectiveness of EMF inoculum application in promoting fungal colonization, plant growth, nutrient uptake, and the quality of rooted cuttings was evaluated forEucalyptus urophylla under commercial nursery conditions. For inoculated treatments, fertilization of the sapling substrate was reduced by 50 %. The experiment was carried out in a completely randomized design in a 4 × 4 factorial arrangement, wherein the factors were inoculum application rates of 0 (control), 5, 10, and 15 gel beads of calcium alginate containing the vegetative mycelium of Amanita muscaria, Elaphomyces antracinus, Pisolithus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Symbiosis; Plant nutrition; Cuttings production; Phosphorus; Nitrogen; Potassium.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000601554

Soil-applied silicon decreases severity of wheat spot blotch on silicon-deficient soils
Provedor de dados: 90
Autores: Zanão Júnior,Luiz Antônio; Fontes,Renildes Lúcio Ferreira; Coelho,Paulo Henrique Moreira; Korndörfer,Gaspar Henrique; Zambolim,Laércio.
Spot bloth caused by Bipolaris sorokiniana is an important wheat desease mainly in hot and humid regions. The aim of this study was to evaluate the response of wheat to different sources and modes of Si application, as related to the severity of wheat spot blotch and plant growth, in two Si-deficient Latosols (Oxisols). An greenhouse experiment was arranged in a 2 x 5 factorial completely randomized design, with eight replications. The treatments consisted of two soils (Yellow Latosol and Red Latosol) and five Si supply modes (no Si application; Si applied as calcium silicate and monosilicic acid to the soil; and Si applied as potassium silicate or monosilicic acid to wheat leaves). No significant differences were observed between the two soils. When Si...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum L; Bipolaris sorokiniana (Sacc. in Sorok.); Plant nutrition; Si.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000200013

Diagnosis and recommendation integrated system (DRIS) of soybean seed oil content
Provedor de dados: 90
Autores: Castamann,Alfredo; Escosteguy,Pedro Alexandre Varella; Berres,Diego; Zanella,Silas.
The Diagnosis and Recommendation Integrated System (DRIS) can improve interpretations of leaf analysis to determine the nutrient status. Diagnoses by this method require DRIS norms, which are however not known for oil content of soybean seeds. The aims of this study were to establish and test the DRIS method for oil content of soybean seed (maturity group II cultivars). Soybean leaves (207 samples) in the full flowering stage were analyzed for macro and micro-nutrients, and the DRIS was applied to assess the relationship between nutrient ratios and the seed oil content. Samples from experimental and farm field sites of the southernmost Brazilian state Rio Grande do Sul (28° - 29° southern latitude; 52° -53° western longitude) were assessed in two growing...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nutritional diagnosis; Plant nutrition; Nutritional balance; Glycine max (L.) Merrill.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000600016

Relationships between soil class and nutritional status of coffee plantations
Provedor de dados: 90
Autores: Wadt,Paulo Guilherme Salvador.
Farm planning requires an assessment of the soil class. Research suggest that the Diagnosis and Recommendation Integrated System (DRIS) has the capacity to evaluate the nutritional status of coffee plantations, regardless of environmental conditions. Additionally, the use of DRIS could reduce the costs for farm planning. This study evaluated the relationship between the soil class and nutritional status of coffee plants (Coffea canephora Pierre) using the Critical Level (CL) and DRIS methods, based on two multivariate statistical methods (discriminant and multidimensional scaling analyses). During three consecutive years, yield and foliar concentration of nutrients (N, P, K, Ca, Mg, S, B, Zn, Mn, Fe and Cu) were obtained from coffee plantations cultivated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: DRIS; Critical level; Plant nutrition; Nutritional diagnosis; Soil classification; Oxisol; Coffea canephora.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832005000200008

Ajmalicine Bioproduction in Catharanthus Roseus (L) G. Don Inoculated with Arbuscular Mycorrhiza and Fertilized with Nitrogen
Provedor de dados: 90
Autores: Monnerat,Cecília Silva; Freitas,Marta Simone Mendonça; Vieira,Ivo José Curcino; Martins,Marco Antônio; Carvalho,Almy Junior Cordeiro de; Santos,Paulo Cesar dos; Lima,Thaísa Capato.
ABSTRACT Catharanthus roseus (L) G. Don (Madagascar periwinkle) belongs to the Apocynaceace family and is widely spread throughout tropical and subtropical regions of the world. The plant produces several important alkaloids, such as ajmalicine and serpentine, which are used in the treatment of circulatory diseases. The potential of inoculation with arbuscular mycorrhizal fungi (AMF) and nitrogen fertilization to enhance the production of alkaloids was investigated in periwinkle. A greenhouse experiment was carried out to evaluate the effects of arbuscular mycorrhizal fungi and N fertilizer dosages on plant growth, production of ajmalicine, and nutrient content in roots. The concentration of ajmalicine was determined by reverse-phase high-performance...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Periwinkle; Apocynaceae; Alkaloids; Plant nutrition.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100416

Doses and forms of Azospirillum brasilense inoculation on maize crop
Provedor de dados: 91
Autores: Santini,José M. K.; Buzetti,Salatiér; Teixeira Filho,Marcelo C. M.; Galindo,Fernando S.; Coaguila,Daniel N.; Boleta,Eduardo H. M.
ABSTRACT In search of a more sustainable agriculture, the use of beneficial microorganisms has been highlighted, because they are low-cost and can reduce the use of fertilizers and increase grain yield. The present study aimed to evaluate the efficiency of A. brasilense inoculation and the best form and dose of inoculation in maize, measuring the impact on some physical characteristics and on its nutrition. The experiment was conducted in a greenhouse, in Ilha Solteira, SP, Brazil, in a completely randomized design, with four replicates and eight treatments: 1) control; 2) Seed 1x; 3) Seed 2x; 4) Soil 1x; 5) Soil 2x; 6) Leaf 1x; 7) Leaf 2x; 8) Seed 1x + Leaf 1x, respectively representing in each treatment the site and dose of application (1x, dose...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diazotrophic bacteria; Plant growth promoters; Plant nutrition; Zea mays L.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000600373

Arugula production as a function of irrigation depths and potassium fertilization
Provedor de dados: 91
Autores: Freitas,Elis M. de; Giovanelli,Luan B.; Delazari,Fábio T.; Santos,Márcio L. dos; Pereira,Silvio B.; Silva,Derly J. H. da.
ABSTRACT Arugula is a vegetable that has gained more highlight in the consumption, being rich in potassium, sulfur, iron, omega-3 and vitamins A and C. Availability of water and nutrients are limiting factors for production of this crop. In this context, the objective of this study was to evaluate the production of arugula subjected to different irrigation depths and potassium fertilization. The experiment was conduct between August and September 2015. The experimental design was completely randomized in split-plot scheme. Irrigation depths L1, L2, L3 and L4 (25, 50, 75 and 100% of crop evapotranspiration, respectively) represented the plots and potassium doses K1 and K2 (200 and 400 kg ha-1, respectively) represented the subplots. Although the highest...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Eruca sativa L.; Drip tape; Plant nutrition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000300197

Agronomic performance of Italian zucchini as a function of phosphate fertilization
Provedor de dados: 91
Autores: Souza,Francisco I. de; Grangeiro,Leilson C.; Souza,Valdívia de F. L. de; Gonçalvez,Francisco das C.; Oliveira,Fábio H. T. de; Jesus,Priscila M. M. de.
ABSTRACT The objective of this research was to evaluate the agronomic performance of Italian zucchini as a function of phosphate fertilization. The experiments were carried at the Rafael Fernandes Experimental Farm, Federal Rural University of the Semi-Arid Region, Mossoró, RN, Brazil, from August to November 2015 and from July to September 2016. The experimental design was randomized blocks in 2 x 5 factorial scheme, with four replicates. The treatments consisted of the combination of two cultivars (Caserta and Alícia) and five doses of phosphorus (0, 40, 78, 120 and 150 kg ha-1 of P2O5). Phosphorus doses associated with the maximum marketable yields estimated were smaller for Alícia than for Caserta in the period from August to November 2015. In the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucurbita pepo L.; Plant nutrition; Yield.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000300206

Maize productivity in succession to cover crops, nitrogen fertilization and inoculation with Azospirillum brasilense
Provedor de dados: 91
Autores: Santos Júnior,Antônio C. dos; Carvalho,Marco A. C. de; Yamashita,Oscar M.; Tavanti,Tauan R.; Tavanti,Renan F. R.
ABSTRACT The use of microorganisms in agriculture such as Azospirillum brasilense and the cultivation of cover crops in the off season, together with nitrogen fertilization, may be interesting alternatives to increase crop yield. The objective of this study was to evaluate the growth, production and nitrogen concentration of maize grown in succession to cover crops and their interactions with A. brasilense inoculation and topdressing mineral N fertilization. The experiment was conducted on Oxisol, in randomized block design in split-split-plot scheme with four repetitions. The plots consisted of four cover crops: jackbean (Canavalia ensiformis), dwarf pigeon pea (Cajanus cajan), crotalaria (Crotalaria spectabilis) and spontaneous vegetation. In the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays L.; Diazotrophic bacteria; Plant nutrition.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001200966

Soil salinity and yield of mango fertigated with potassium sources
Provedor de dados: 91
Autores: Carneiro,Marcio A.; Lima,Augusto M. N.; Cavalcante,Ítalo H. L.; Cunha,Jailson C.; Rodrigues,Marcos S.; Lessa,Thiago B. da S.
ABSTRACT Irrigated fruit crops have an important role in the economic and social aspects in the region of the Sub-middle São Francisco River Valley. Thus, the aim of this study was to evaluate soil salinity and the productive aspects of the mango crop, cv. Tommy Atkins, fertigated with doses of potassium chloride (KCl) and potassium sulfate (K2SO4) during two crop cycles (from January to March 2014 and from January to March 2015). The experiment was carried out in a strip-split-plot design and five potassium doses (50, 75, 100, 125 and 150% of the recommended dose) as plots and two potassium sources (KCl and K2SO4) as subplots, with four replicates. Soil electrical conductivity (EC), exchangeable sodium (Na+) and potassium (K+) contents and pH were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Electrical conductivity; Plant nutrition; Mangifera indica L.; Semi-arid region.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000500310

Agronomic yield and quality of industrial tomatoes under NPK doses
Provedor de dados: 91
Autores: Almeida Neta,Maria N.; Mota,Wagner F. da; Pegoraro,Rodinei F.; Pacheco,Maricelia C.; Batista,Caik M.; Soares,Marcela de C.
ABSTRACT High doses of nitrogen, phosphorus and potassium in irrigated systems may lead to an increase in the productivity of industrial tomatoes, but may also alter the final quality of the fruits. The objective of this was to evaluate the agronomic yield and post-harvest quality of industrial tomatoes, under NPK doses for climatic conditions of Northern Minas Gerais state, Brazil. The study was conducted in the city of Jaíba, MG, Brazil, in randomized block design with four repetitions in a 3 x 3 factorial scheme, consisting of three doses of N (90, 135 and 180 kg ha-1), of P (270, 405 and 540 kg ha-1) and of K (225, 337 and 450 kg ha-1), corresponding to 50, 75 and 100% of the fertilization recommendation; and three tomato hybrids: BRS Sena, Heinz 9553...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum lycopersicum; Plant nutrition; Low-growing tomato; Pulp yield.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000100059

Yield and quality of densely cultivated onion cultivars as function of nitrogen fertilization
Provedor de dados: 91
Autores: Gonçalves,Francisco das C.; Grangeiro,Leilson C.; Sousa,Valdivia de F. L. de; Santos,Jandeilson P. dos; Souza,Francisco I. de; Silva,Luiz R. R. da.
ABSTRACT Nitrogen exerts a marked influence on the yield and quality of the onion. The present work was developed from June to October 2016, aiming to evaluate the yield and quality of two cultivars of onion under a system densified as a function of nitrogen doses in Mossoró, RN, Brazil. A randomized block design was used in a 2 x 7 factorial scheme, with four repetitions, corresponding to two cultivars (IPA 11 and Rio das Antas) and seven nitrogen doses (0, 45, 90, 135, 180, 225 and 270 kg ha-1 of N), provided by fertigation, with four repetitions. The dose of 92 kg ha-1 of N provides the highest total and marketable yields of bulbs. Nitrogen fertilization increases the concentrations of N, chlorophyll a, b and total in the leaves of the onion, as well as...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allium cepa; Classification of bulbs; Plant nutrition; Economic indicators.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019001100847

Nutritional status and fruit production of Carica papaya as a function of coated and conventional urea
Provedor de dados: 91
Autores: Silva Júnior,Gabriel B. da; Santos,Eduardo M. dos; Silva,Roberto L.; Cavalcante,Ítalo H. L.
ABSTRACT As a strategy to minimize N losses in the soil, mineral N sources, such as polymer-coated urea, have been studied as possibility to increase the synchronization of N release by the fertilizer and its absorption by plants. Thus, this study aimed to evaluate the contents of macronutrients and the production of Formosa papaya as a function of sources and doses of N fertilizer applied as top-dressing in the region of Bom Jesus-PI, Brazil. The treatments were arranged in a 2 x 4 factorial scheme corresponding to N sources (coated urea and conventional urea) and N doses (350, 440, 530 and 620 g plant-1 of N), with four replicates and four plants per plot. The contents of macronutrients in the leaf dry matter and fruit production were evaluated. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carica papaya L.; Controlled release fertilizer; Plant nutrition; Fruit yield.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016000400322

Agronomic performance of lettuce subjected to green manure with different leguminous species
Provedor de dados: 91
Autores: Sarmento,José J. A.; Santos,José J. F. dos; Costa,Caciana C.; Bomfim,Marinês P.
ABSTRACT Green manure is the practice of cultivation and incorporation of plants to the soil, mainly leguminous species, produced or not in situ, for the purpose of preserving and/or restoring soil organic matter and soil nutrients. To compare the effects of incorporating leguminous species in the pre-planting green manure on lettuce production, seven treatments were tested: mineral fertilization; crotalaria (Crotalaria juncea); cowpea (Vigna unguiculata); common bean (Phaseolus vulgaris); lablab bean (Dolichos lablab); pigeon pea (Cajanus cajan) and spontaneous plants. The treatments were arranged in the randomized blocks, with five repetitions. The experiment was conducted in the experimental area of the CCTA/UFCG, in the period from April to December...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactuca sativa; Nutrient cycling; Plant nutrition; Yield.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000200114

Mineral fertilization with macronutrients in castor bean, lineage UFRB 222
Provedor de dados: 91
Autores: Cavalcante,Antonio R.; Lima,Washington B. de; Chaves,Lucia H. G.; Fernandes,Josely D.; Souza,Felipe G. de; Silva,Simone A.
ABSTRACT The study was conducted to evaluate the effect of mineral fertilization on the growth and production of seeds and oil of castor bean (Ricinus communis L.) lineage UFRB 222. The experiment was carried out in a greenhouse of the Centro de Tecnologia e Recursos Naturais at the Universidade Federal de Campina Grande, PB, Brazil. A randomized block design with three repetitions and 14 treatments originated from a Baconian matrix was adopted. Reference doses were 50:300:150 kg ha-1 of N, P2O5 and K2O. At the end of the study, plant height, stem diameter, number of leaves, leaf area, total seed number, total seed weight, total fruit number and oil production per plant were evaluated. On average, the nitrogen dose of 150 kg ha-1 led to adequate values of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ricinus communis L.; Growth; Production; Plant nutrition.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000200106

Variability and spatial correlation of soil micronutrients and organic matter with macadamia nut production
Provedor de dados: 91
Autores: Paris,Jaqueline O.; Gontijo,Ivoney; Partelli,Fábio L.; Facco,Alexandro G.
ABSTRACT Soil fertility is the key to agricultural production. The spatial correlation and location of nutrients may significantly affect the yields. The objective of this work was to evaluate the variability and spatial correlation of iron (Fe), copper (Cu), manganese (Mn), zinc (Zn), and organic matter (OM) with macadamia nut yield. The study was conducted in an Oxisol cultivated for 20 years with macadamia nut in São Mateus, state of Espírito Santo, Brazil. A 100 point grid was used comprising an area of 144 × 140 m with a minimum distance between points of 5 m, in which a single composite soil sample was collected from 0-0.20 m layer for chemical analysis of Fe, Cu, Mn, Zn and OM. Nuts under the canopy’s projection were harvested from February to June,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Macadamia integrifolia; Spatial variability; Geostatistics; Plant nutrition.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000100031

Avaliação da infestação de insetos-praga associados à batata (Solanum tuberosum L.) sob efeito de nutrientes nitrogenados e potássicos e teores acumulados de aminoácidos livres nas cultivares Achat e Monalisa
Provedor de dados: 92
Autores: Azeredo,Edson Henrique de; Cassino,Paulo Cesar Rodrigues; Lima,Eduardo.
Evaluation of insect-pest infestation associated to potato (Solanum tuberosum L.) under effect of nitrogen and potassium fertilizers and the accumulated amount of free aminoacids in Achat and Monalisa cultivars. The objective of this work was to evaluate the occurence of insect-pests on potato plants influenced by dosages of nitrogen and potassium accumulated in plant organs. A total of 169 plants of the Achat and Monalisa cultivars were evaluated to determine the presence-absence of Diabrotica speciosa Germar, 1824 and Agrotis ipsilon Hüfnagel, 1767. The experiment was carried out and executed at the Universidade Federal Fluminense, and the delineation was complete randomized block design, with four replication and nine treatments, using three...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diabrotica speciosa; Agrotis ipsilon; Damage level; Monitoring; Plant nutrition.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262002000100002

EVALUATION OF NITROGEN MONITORING, BUD FERTILITYAND ‘THOMPSON SEEDLESS’ GRAPEVINE PRODUCTION ON DIFFERENT ROOTSTOCKS
Provedor de dados: 94
Autores: MARTINEZ,EMANUEL ALMEIDA; RIBEIRO,VALTEMIR GONÇALVES; VILAR,PATRÍCIA FERNANDA INÁCIO; HAUSEN,LEANDRO JOSÉ DE OLIVEIRA VON; BEZERRA,ERIANE DANTAS.
ABSTRACT Methods of nitrogen analysis were adopted in leaf tissues in the laboratory, nitrate content in the sap of petioles and chlorophyll relative index (CRI, in SPAD unit), as well as the evaluation of the buds fertility rates, production and qualitative aspects of cluster and berries of ‘Thompson Seedless’ vine, grafted on rootstocks ‘Harmony’, ‘Jales’ ‘Paulsen 1103’ and ‘SO4’. The applied dose of N was 80 kg ha-1, and the experiment was installed in the Submédio do Vale do São Francisco, Brazil. The experiment was performed in a randomized blocks design, with four treatments and five replicates, with the experimental plot represented by five plants. In addition to the analysis of N, cluster length and width (cm) and fresh mass (g), berries length,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vitis vinifera (L.); Plant nutrition; Buds fertility; Viticultura tropical irrigada.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000500705

Nutritional status, production and fruit quality of west indian cherry fertigated with nitrogen and humic substance
Provedor de dados: 94
Autores: Dias,Dayanne do Nascimento; Sousa,Karla dos Santos Melo de; Lima,Augusto Miguel Nascimento; Cavalcante,Ítalo Herbert Lucena; Santos,Laura Paula Araújo dos; Cunha,Jailson Cavalcante.
Abstract  Information on humic substances (HS) associated with nitrogen fertilization in West Indian cherry is scarce in the literature. The use of soil conditioners, such as HS, can increase the efficiency in the absorption of nutrients, especially N. Therefore, the present study aimed to evaluate, in two production cycles, the fruit quality, yield and nutritional status of West Indian cherry as a function of fertigation with nitrogen (N) and HS in Petrolina-PE, Brazil. The experimental design was in split plots, with treatments distributed in 5 x 2 strips, referring to N doses (50, 75, 100, 125 and 150% of the recommended dose) and HS application (without and with), respectively, with 4 replicates and 3 plants per plot. The N source used was urea (45% N)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Malpighia emarginata; Plant nutrition; Nitrogen fertilization; Humic acid; Production.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452020000203002

USE OF YIELD AND TOTAL SOLUBLE SOLIDS/TOTAL TITRATABLE ACIDITY RATIO IN ORANGE ON GROUP DEFINITION FOR STANDARD DRIS
Provedor de dados: 94
Autores: SUSZEK,GRAZIELI; SOUZA,EDUARDO GODOY DE; NÓBREGA,LUCIA HELENA PEREIRA; PACHECO,FÁBIO; SILVA,CLAUDIA TATIANA ARAUJO DA CRUZ.
ABSTRACT  The nutritional quality of orange influences directly on its juice quality. Therefore, the DRIS (Diagnosis and Recommendation Integrated System) allows the verification of nutrients balance in plants as well as determine if its growth is associated or not to nutritionals restrictions. Thus, this research applied the total soluble solids/total titratable acidity to identify the standard group and to define the DRIS. The experiment was carried out in an orange orchard (1 ha) of the Monte Parnaso variety, in Southern Brazil. Twenty trees were geo-referenced, aiming to collect samples for foliar analysis and quantify fruits quality parameters. Therefore, it was possible to observe that total soluble solids/total titratable acidity presented the best...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chemical properties of fruits; Citrus sinensis; Plant nutrition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000403003

Critical levels and sufficiency ranges for leaf nutrient diagnosis in cowpea grown in the Northeast region of Brazil
Provedor de dados: 124
Autores: Melo,Francisco de Brito; Souza,Henrique Antunes de; Bastos,Edson Alves; Cardoso,Milton Jose.
ABSTRACT Proposing sufficiency ranges and critical levels is an important technique for correct evaluation of leaf nutrient diagnosis. In this study, the objective was to propose critical levels and sufficiency ranges of macro- and micronutrients for the diagnostic leaf of cowpea, collected at flowering, with the results of macro- and micronutrients and productivity in the Northeast of Brazil. The critical level was calculated by the reduced normal distribution and by the boundary line method, which was also used to generate sufficiency ranges. For the critical level by reduced normal distribution, the relationship of the nutrients with 90% of maximum productivity was adopted. For the boundary line, the relationship of the nutrients that are in the upper...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vigna unguiculata; Leaf content; Plant nutrition.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000400407

Sunflower fertigated with potassium fertilization in two agricultural seasons in the Brazilian semiarid region
Provedor de dados: 124
Autores: Santos,Allysson Pereira dos; Tartaglia,Francilene de Lima; Souza,Almir Rogerio Evangelista de; Santos,Manoel Galdino dos; Silveira,Lindomar Maria da; Barros Júnior,Aurélio Paes.
ABSTRACT The objective of this study was to evaluate the effect of potassium doses on the production components of sunflower cultivars grown in the semiarid climate region. The experiment was carried out in two agricultural seasons, in 2016 and 2017, at the Rafael Fernandes Experimental Farm, Mossoró, RN, Brazil. The experimental design used was randomized blocks, in split plots, with four replicates. Five potassium doses were evaluated in the plots: 0, 30, 60, 90 and 120 kg ha-1 of K2O, and four sunflower cultivars were evaluated in the subplots: Aguará 6, Altis 99, Multissol and BRS 122. The evaluated characteristics were: K content in the diagnostic leaf (KDL), thousand-achene weight (TAW), achene yield (AY), oil content (OC) and oil yield (OY)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annuus L.; Potassium doses; Plant nutrition; Yield; Oilseed crop.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000200403

Atributos do solo e qualidade de frutos nos sistemas convencional e orgânico de produção de maçãs no Sul do Brasil1
Provedor de dados: 124
Autores: Amarante,Cassandro Vidal Talamini do; Rosa,Eliete de Fátima Ferreira da; Albuquerque,Jackson Adriano; Klauberg Filho,Osmar; Steffens,Cristiano André.
O presente estudo teve como objetivo avaliar as características físicas, químicas e biológicas do solo, a composição mineral e a qualidade de frutos, em pomares de maçãs 'Royal Gala' conduzidos sob os sistemas de produção convencional (CON) e orgânico (ORG), em um Nitossolo Háplico. Na linha de cultivo das plantas, o solo no ORG apresentou melhor qualidade física (maiores valores de estabilidade dos agregados, condutividade hidráulica saturada e porosidade total, e menor densidade), química [menor acidez e maiores valores de Ca e Mg trocáveis, carbono orgânico total (COT) e nitrogênio total (NT)] e biológica [maiores valores de carbono da biomassa microbiana (Cmic) e relação Cmic/COT], na camada de 0-20 cm, quando comparado ao CON. Como no ORG não foram...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Malus domestica (Borkh); Soil attributes; Plant nutrition; Fruit postharvest.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000100099

Nutritional status of the potted chrysanthemum relative to electrical conductivity and salt leaching
Provedor de dados: 124
Autores: Beckmann-Cavalcante,Márkilla Zunete; Pivetta,Kathia Fernandes Lopes; Cavalcante,Ítalo Herbert Lucena; Cavalcante,Lourival Ferreira; Silva Júnior,José Valdenor da.
The quality of ornamental plants grown in pots is highly dependent on fertilization and substrate management. To this effect, we carried out an experiment in a protected environment to evaluate the nutritional status of the chrysanthemum cv. Miramar grown in pots, relative to the electrical conductivity of the nutrient solution and the leaching of salts. The experimental design was of randomized blocks with four replications and the treatments arranged in a 5 x 2 factorial, relating to the levels of electrical conductivity of the nutrient solution (ECs = 2.1; 2.8; 3.5; 4.2 and 4.9 dS m-1) in substrates without (SNL) and with (SWL) washing for the leaching of salts. The nutritional status of the plants was evaluated by leaf analysis of macronutrients (N, P,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dendranthema grandiflora Tzvelev; Substrate; Plant nutrition.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902013000400015

Foliar macronutrient levels and production of maize (Zea mays L.) after gypsum application in an Oxisol
Provedor de dados: 22
Autores: Minato, Evandro Antonio; Esper Neto, Michel; Sakurada, Rodrigo Lima; Inoue, Tadeu Takeyoshi; Batista, Marcelo Augusto.
The application of gypsum to the soil provides a favorable environment for the development of the root system, supplying the subsurface layers with elements such as calcium and sulfur and reduce the toxic aluminum activity. The objective of this study was to evaluate the influence of gypsum doses application on the maize (Zea mays L.) yield and the nutrients levels in the leaves. The study was conducted in the municipality of Terra Roxa - PR in an Oxisol using experimental design of randomized blocks with four replications. The treatment were composed of different doses of gypsum (0, 3.0, 6.0 and 9.0 t ha-1) applied after sowing corn. When the plants were in the R1 stage leaves were collected and analyzed the levels of N, P, K, Ca, Mg and S. After...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Calcium; Sulfur; Plant nutrition; Yield.
Ano: 2017
URL: http://e-revista.unioeste.br/index.php/scientiaagraria/article/view/14208

Sulfur modulates yield and storage proteins in soybean grains
Provedor de dados: 63
Autores: Ibañez,Thiago Bergamini; Santos,Luiz Felipe de Melo; Lapaz,Allan de Marcos; Ribeiro,Igor Virgilio; Ribeiro,Filipe Virgilio; Reis,André Rodrigues dos; Moreira,Adônis; Heinrichs,Reges.
ABSTRACT This study evaluated the nutritional quality, yield, and storage protein modulation in soybean grains in response to levels and sources of sulfur (S) in a dystrophic Ultisol. We used five levels of S (0, 50, 100, 150 and 200 mg kg –1 ) and four sources of S (elemental S pastille - ESPA, gypsum - GY, gypsite - GI and elemental S powder - ESPO). Plants treated with 50 mg kg –1 of GY, GI, and ESPO and 200 mg kg –1 of ESPA had the largest grain yield values. Low S supply resulted in lower yields for all S sources tested. Sulfur deficiencies were observed at all levels for ESPA, resulting in lower concentrations of globulin and higher concentration of glutelin and albumin in the grains, possibly because the S content in the leaf was below the range...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Plant nutrition; Elemental sulfur; Sulfate.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000101402

Seed germination and seedling development of white oat affected by silicon and phosphorus fertilization
Provedor de dados: 63
Autores: Toledo,Mariana Zampar; Garcia,Rodrigo Arroyo; Merlin,Alexandre; Fernandes,Dirceu Maximino.
Silicon (Si) fertilizers have been increasingly used in agriculture due to several benefits as acidity correction in tropical soils and positive effects on the development of grasses. Nutrient availability and plant nutrition play an important role in seed production and may affect the physiological quality of white oat seeds. The present study had as objective to evaluate seed germination and seedling development of white oat (Avena sativa L.) affected by silicon and phosphorus fertilization. The experimental design was the completely randomized, analyzed as a factorial 2 x 4, with six replications. Treatments consisted of 20 and 200 mg dm-3 of P2O5, applied as triple superphosphate, combined with 0, 150, 300 and 450 mg dm-3 of Si, as potassium silicate....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Avena sativa L; Germination; Vigor; Plant nutrition.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000100003

Changes in the ultrastructure of soybean cultivars in response to manganese supply in solution culture
Provedor de dados: 63
Autores: Lavres Junior,José; Reis,André Rodrigues; Rossi,Mônica Lanzoni; Cabral,Cleusa Pereira; Nogueira,Neusa de Lima; Malavolta,Eurípedes.
The deleterious effects of Mn stress on many species have been studied, mainly concerning biochemical, physiological and growth parameters of plants. However, there are few studies relating the anatomical and ultrastructural changes in response to manganese (Mn) nutritional disorders, This study examined the leaf ultrastructure of Mn-inefficient (IAC-15, Santa Rosa) and Mn-efficient (IAC-Foscarin 31) soybean (Glycine max L.) genotypes in response to three rates of Mn (0.5, 2 and 200 µmol L-1) in the nutrient solution. Symptoms of Mn deficiency developed 12 days after transplanting in IAC-15 and Santa Rosa, followed by IAC-Foscarin 31 on the 15th day. Only IAC-15 and Santa Rosa leaves showed symptoms of Mn toxicity. The Mn concentration in leaves ranged...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chloroplast; Deficiency; Plant nutrition; Toxicity.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000300006

Absorption and mobility of radio-labelled calcium in chili pepper plants and sweet cherry trees
Provedor de dados: 63
Autores: Bonomelli,Claudia; Alcalde,Carolina; Aguilera,Camila; Videla,Ximena; Rojas-Silva,Ximena; Nario,Adriana; Fernandez,Victoria.
ABSTRACT: Calcium (Ca) is often supplied to crop species to prevent the occurrence of Ca–related disorders. Mechanisms of Ca absorption and transport are not fully understood and the effectiveness of root and/or foliar Ca fertilization may be variable. To characterize the rate of Ca absorption and transport, trials were developed with chili pepper and sweet cherry plants, using 45CaCl2 as a tracer. The Ca treatments supplied were: (1) No 45Ca (control); (2) 45Ca soil application; (3) 45Ca supply to basal leaves, and (4) 45Ca application to apical leaves. After two months, plants were harvested for biomass and Ca content determination. The recovery of 45Ca in different plant parts was measured with a liquid scintillation counter and leaf traits were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertilizers; Fertilizer application methods; Horticultural crops; Plant nutrition; Radioisotopes.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000601403

Establishment and optimization of a hydroponic system for root morphological and nutritional analysis of citrus
Provedor de dados: 63
Autores: Zhou,Gaofeng; Wei,Qingjiang; Li,Bixian; Zeng,Xiaoli; Liu,Guidong.
ABSTRACT The hydroponic growth system is a convenient platform for studying whole plant physiology, especially for root morphological and nutritional analysis. However, we found that most hydroponic systems described in the literature are not suitable for citrus plants. In this study, a hydroponic system for citrus was designed, comprising three principal components: power and time switch, aeration and hydroponic culture. Herein, details of the protocol were described, including equipment setup, seed pregermination and cultivation, together with preparation and transfer of nutrient solution into hydroponics. In order to demonstrate the adaptability of the trifoliate orange plant to our hydroponic system, comparative tests between soil- and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cultivation; Plant nutrition; Trifoliate orange; Root morphology.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000401403

Biodegradable oil-based polymeric coatings on urea fertilizer: N release kinetic transformations of urea in soil
Provedor de dados: 63
Autores: Bortoletto-Santos,Ricardo; Guimarães,Gelton Geraldo Fernandes; Roncato Junior,Vanderlei; Cruz,Diego Fernandes da; Polito,Wagner Luiz; Ribeiro,Caue.
ABSTRACT: Polymer coatings are used to control the rate of release of plant available nutrients from fertilizers as well as to reduce nutrient losses such as ammonia (NH3) volatilization. Although the literature presents several examples of materials used to coat urea, little is known about nitrogen (N) release properties such as the mechanism involved and phenomena (e.g., pore opening) in the polymer coating. Thus, this study investigated urea release from polyurethane (PU) derived from two renewable raw materials (castor oil and soybean oil), to explain how the oil structure and coating microstructure influence release and urea-N dynamics in soil. The results demonstrated that the profile of urea release and the urea-N mineralization in the soil could be...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Polyurethane; Controlled release; Plant nutrition; Soil fertility; Nitrogen.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162020000101402

Magnesium-induced alterations in the photosynthetic performance and resistance of rice plants infected with Bipolaris oryzae
Provedor de dados: 63
Autores: Moreira,Wiler Ribas; Bispo,Wilka Messner da Silva; Rios,Jonas Alberto; Debona,Daniel; Nascimento,Clístenes Williams Araújo; Rodrigues,Fabrício Ávila.
Brown spot (BS), caused by the fungus Bipolaris oryzae, is one of the most important diseases contracted by rice. We investigated the effect of magnesium (Mg) on the development of BS, caused by Bipolaris oryzae, and the effects of disease development on the photosynthetic performance of rice (Oryza sativa L.) plants (cv. Metica-1) grown in nutrient solutions containing 0.25 or 4.0 mM of Mg. Assessments of BS severity, leaf Mg and pigment concentrations (total chlorophylls and carotenoids), were carried out at 120 h after inoculation, in addition to gas exchange parameters,. Higher leaf concentration of Mg was observed in plants supplied with 4.0 mM Mg than in those supplied with 0.25 mM. The increase in leaf Mg was accompanied by a decrease in BS...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa; Foliar disease; Macronutrient; Photosynthesis; Plant nutrition.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000400328

Boron nutrition and yield of alfalfa cultivar crioula in relation to boron supply
Provedor de dados: 63
Autores: Santos,Anacleto Ranulfo dos; Mattos,Waldssimiler Teixeira de; Almeida,Ana Aparecida da Silva; Monteiro,Francisco Antonio; Corrêa,Beatriz Dias; Gupta,Umesh C.
Alfalfa cultivar Crioula (Medicago sativa cv. Crioula) is grown in South Brazil and only a few studies on the plants' boron requirement are available. A greenhouse experiment was carried out with alfalfa to measure boron acquisition, production and distribution in the plant; data on critical level and production potentials were recorded. Plants were grown in ground quartz added with 1 L of solution, with the following boron rates: 0, 0.0625, 0.125, 0.25, 0.50, 1.00, and 2.00 mg L-1. Plants were harvested at 46 days of growth. Forage dry mass was increased by boron supply and dry matter accumulation was considerably low in control. Boron concentration in the leaves was higher than in the stems or roots. Boron utilization from the external solution reached...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lucerne; Medicago sativa; Plant nutrition; Micronutrient; Critical level.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000500006

ผลของไนโตรเจนและซัลเฟอร์ต่อปริมาณอัลลิซิน ในกระเทียม (Allium sativum L.)
Provedor de dados: 106
Autores: Pitsanu Sukkaew; Arak Tira-umphon.
Allicin is the most important secondary metabolite in garlic. It can inhibit the growth of various microorganisms, reduce plasma cholesterol, blood pressure, antiflamatory and reduce platelet aggregation. Plant nutrient is an important factor which affects the allicin content in garlic. In this, the research aimed to increase allicin content in garlic. Garlics were grown in growing bag containing substrate mixtures. They were fertilized with different nitrogen (N) and sulfur (S) concentrations and other nutrients. Three levels of N (180, 360 and 540 mg/l) and five levels of sulfur (25, 100, 175, 250 and 325 mg/l) were applied and treatments were arranged in Factorial combination in CRD, with four replications and two subsamples per replication. N and S...
Tipo: PhysicalObject
Palavras-chave: Garlic; Allium sativum; Allicin content; Sulfur; Nitrogen; Plant nutrition; Plant physiology; Chemical composition; กระเทียม; อัลลิซิน; การให้ธาตุอาหาร; ธาตุอาหารพืช; ซัลเฟอร์; ไนโตรเจน; ความเข้มข้นของธาตุอาหาร; การตอบสนองของพืช; การสังเคราะห์ส่วนประกอบทางเคมี.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5791

การเปลี่ยนแปลงความเข้มข้นของธาตุอาหารในใบพลับพันธุ์ ฟูยุ และ P2 ในรอบปี
Provedor de dados: 106
Autores: Jatupong Fujarern.
Thesis (M.Sc. in Agriculture)
Tipo: PhysicalObject
Palavras-chave: Persimmon leaf; Diospyros; Fuyu variety; P2 variety; Nutrient concentrations; Leaf analysis; Plant nutrition; Nitrogen; Phosphorus; Potassium; Calcium; Boron; Chiangmai province; Thailand; ใบพลับ; พันธุ์ฟูยุ; พันธุ์พีสอง; ธาตุอาหารพืช; การวิเคราะห์ระดับธาตุอาหาร; ระดับความเข้มข้น; ไนโตรเจน; ฟอสฟอรัส; โพแทสเซียม; แคลเซียม; โบรอน; จ.เชียงใหม่; ประเทศไทย.
Ano: 2009
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5504

Integrated system for recommending fertilization rates in pineapple (Ananas comosus (L.) Merr.) crop
Provedor de dados: 109
Autores: Salgado García,Sergio; Palma López,David Jesús; Zavala Cruz,Joel; Ortiz García,Carlos Fredy; Lagunés Espinoza,Luz del Carmen; Castelán Estrada,Mepivoseth; Guerrero Peña,Armando; Ortiz Ceballos,Ángel Isauro; Córdova Sánchez,Samuel.
Abstract In recent years much attention has focused on the impacts of agriculture on climate change, due to this stage specialists in plant nutrition and soil fertility have achieved the task of generating adequate fertilization doses for pineapple to reduce effects on environment. A methodology for Integrated System for Recommending Fertilizer Dose (ISRFD) was used. As a result, seven Thiessen polygons of the average annual rainfall, where rainfall ranged from 1640 to 2841 mm was correlated. Therefore, three major soil groups were defined and classified as subunit level. Likewise, eight doses of fertilizers were generated as follows: N, P2O5 and K2O, with a fertilizer dose, a map is generated according to the cultivar: 230-138-300 for Creole pineapple in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acrisol; Fertilizer formulations; Fertilization map; Micronutrientes; Nutrient availability (soil); Plant nutrition; Soil fertility.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000400566

Absorption curves - mineral-extraction under an aeroponic system for white chrysanthemum (Dendranthema grandiflorum (Ramat.) Kitam. cv. Atlantis White)
Provedor de dados: 109
Autores: Chica Toro,Faber de Jesús; Garzón-González,Jorge M.
Abstract The aim of this study focused on the construction of the absorption and extraction curves under an aeroponic system for White chrysanthemum cv. Atlantis White, and therefore, propose the periods of maximum and minimum nutrient accumulation from aboveground, root and total biomass. Vegetative cycle of the plant, measured from the day after transplantation (dat) to aeroponic system, and the first day of court lasted 49 days. Evaluations were carried out each week on plants, in absolute competition. For the average aboveground biomass, three replicates were recorded. To obtain total root biomass only one sample, was measured. Therefore, total biomass in average, had achieved 130.9313 g.plant-1, where 72.26% (94.163 g) corresponded to the aboveground...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Macronutrients; Nutrient balance (plants); Nutritional status; Ornamental species; Plant development stage; Plant nutrition; Plant soil relations.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100086

Effects of vinasse and lithothanmium application on the initial growth of sugar cane (Saccharum sp. cv. RB 86-7515) irrigated and not irrigated
Provedor de dados: 109
Autores: Maradiaga-Rodriguez,Walter Danilo; Pêgo-Evangelista,Adão Wagner; Alves Júnior,José; Costa,Rommel Bernardes-da.
Abstract The aim of this study was to evaluate the effect of different doses of organic fertilization with doses of lithothanmium and vinasse on the initial growth of sugarcane cv. RB 86-7515. The study was carried out in the experimental area of the School of Agronomy, of Universidade Federal de Goiás, Brazil. A completely randomized experimental design was carried out to analyze data with three replicates, in a 5 x 5 x 2 factorial scheme. Plants were cultivated in containers of 200 liters. Treatments correspond to five vinasse doses (0, 165, 330, 495 and 660 m3.h-1) and five doses of lithothanmium (0, 100, 200, 300 and 400 kg.ha-1) and sugarcane cultivation under irrigated and rainfed conditions. Irrigation was carried out using a drip emitter system...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alternative fertilization; Nutrient balance (plants); Phenological stage; Plant nutrition; Plant-water relations; Soil fertility; Sugarcane requirements.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000200252

Differences in root distribution, nutrient acquisition and nutrient utilization by tropical forage species grown in degraded hillside soil conditions¹
Provedor de dados: 109
Autores: Gómez-Carabalí,Arnulfo; Idupulapati Madhusudana,Rao; Ricaute,Jaumer.
Low nutrient availability, especially phosphorus (P) and nitrogen (N) supply is the major limitation to forage production in acid infertile soils of the tropics. A field study was conducted at the farm ‘La Esperanza’ located in Mondomo, Department of Cauca, in the coffee growing zone of Colombia. The main objective was to determine differences in root distribution, nutrient (N, P, K, Ca, Mg and S) acquisition and nutrient utilization of one C4 forage grass (Brachiaria dictyoneura) and two C3 forage legumes (Arachis pintoi and Centrosema macrocarpum) grown under two fertilization levels, cultivated either in monoculture or in association and harvested at four different ages.There were no significant differences in root biomass among the grass and legumes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant nutrition; Nutrient uptake; Brachiaria dictyoneura; Centrosema macrocarpum; Arachis pintoi; Hillside; Colombia.
Ano: 2010
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122010000200009

Effect of nitrogen fertilization on productivity and quality of Mombasa forage (Megathyrsus maximum cv. Mombasa)
Provedor de dados: 109
Autores: Munari-Escarela,Carolina; Pietroski,Marizane; Mello-Prado,Renato de; Silva-Campos*,Cid Naudi; Caione,Gustavo.
Abstract Mombasa grass is very demanding and responsive to soil fertility. The objective of the present study was to evaluate forage production and the correlation among crude protein and the green color index of leaves of Megathyrsus maximum cultivar Mombasa in function of nitrogen levels. The study was conducted using 5 dm-3 pots in a greenhouse at the Universidade Estadual Paulista - UNESP, Jaboticabal, São Paulo. The experimental design consisted of randomized blocks with five treatments and four replications. Treatments were nitrogen rates (0, 62.5, 125, 250 and 500 mg dm-3 of N), corresponding to 0, 125, 250, 500 and 1000 kg ha-1 of N. We evaluated the production of grass dry matter, the green color index, the accumulation of nitrogen and crude...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chlorophyll; Forage; Plant nutrition; Protein; Urea.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000100042

Foliar application of molybdenum enhanced quality and yield of crispleaf lettuce (Lactuca sativa L., cv. Grand Rapids)
Provedor de dados: 109
Autores: Steiner,Fábio; Zoz,Tiago; Zuffo,Alan Mario; Pereira-Machado,Patrícia; Zoz,Jardel; Zoz,André.
Abstract Foliar molybdenum (Mo) application may enhance the nitrogen (N) acquisition by the plants and increase the yield and quality of vegetables. A study was conducted to investigate the effect of foliar Mo spray on N nutrition and yield of crispleaf lettuce (Lactuca sativa L., cv. Grand Rapids) grown in the spring-summer period. The experiment was carried out at Ourinhos, São Paulo State, Brazil, from October 2013 to January 2014. Treatments consisted of five Mo rates [0 (control), 25, 50, 75, and 100 g ha-1 of Mo] divided into two foliar sprays, at 14 and 21 days after planting. Foliar application of Mo rates reduced the nitrate (NO3 -) concentration, and increased the concentrations of ammonium (NH4+), total N and Mo in the lettuce leaves. These data...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Molybdoenzymes; Nitrate assimilation; Plant nutrition; Nitrate accumulation; Vegetable quality.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100073

Yield and nutrition of greenhouse-grown strawberries (Fragaria χ ananassa (Duchesne ex Weston) Duchesne ex Rozier. cv. Camarosa) as affected by potassium fertilization
Provedor de dados: 109
Autores: Schwarz,Kélin; Vilela-Resende,Juliano Tadeu; Pierozan-Junior,Clovis; Paula,Juliana Tauffer-de; Baier,João Eduardo; de Souza-Silva,Maria Ligia; Brendler-Oliveira,Felipe.
Abstract In strawberry, potassium fertilization has been little studied, which difficult management strategies for an increasing yield and understanding the use of this nutrient in strawberry crop. The aim of this study was to evaluate the influence of sources and rates of potassium (K) fertilizers on yield, K level and agronomic traits of strawberry cv. Camarosa fruit, carried out under greenhouse conditions. A randomized in a completely block design with four replicates in a factorial arranged 6x3 (six rates of potassium x three sources of potassium fertilizers), was performed. Fertilizers sources used were as follows: potassium sulphate, potassium nitrate and potassium chloride in 0, 60, 120, 180, 240 and 300 kg ha-1 K2O doses. An increasing potassium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertilizer application; Nutrient balance (plants); Nutritional status; Plant nutrition; Potassium content in leaves; Potassium extraction.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100114

Nutrient contents in camu-camu plants (Myrciaria dubia (Kunth) McVaugh) fertirrigateds with different doses of nitrogen
Provedor de dados: 109
Autores: Abanto-Rodríguez,Carlos; Chagas,Edvan Alves; da Silva Siqueira,Raphael Henrique; Araújo,Wellington Farias; Zborowski,Luiz Guilherme Carvalho; Souza,Caio César Pinho; Sakasaki,Roberto Tadashi; Lopes Monteiro Neto,João Luiz; Sánchez-Choy,José.
Abstract Camu-camu (Myrciaria dubia (Kunth) McVaugh) is a native fruit tree, which is in domestication process, therefore, knowledge of nutritional needs is essential to improve the fertilization efficiency throughout plant development. The aim of this research was to determine the nutrient content of camu-camu plants as a function of nitrogen fertilization via fertirrigation in the first year of cultivation. An experiment was carried out in a randomized complete block design, with 5 treatments as follows: 0; 40; 80; 120 and 160 kg.ha-1 of N, eight replicates and seven plants per experimental unit. The evaluated variables were as follows: total dry matter and nutrient contents in camu-camu leaves. The results show total dry matter of camu-camu plants,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dry matter; Micronutrients; Nutrient balance (plants); Plant development; Plant nutrition.
Ano: 2018
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000100079

NUTRIENT MANAGEMENT PRACTICES FOR ENHANCING SOYBEAN (Glycine max L.) PRODUCTION
Provedor de dados: 37
Autores: HELLAL,FARID A.; ABDELHAMID,MAGDI T.
Soybean (Glycine max L.), is the most important pulse crop in the world. Soybean is a very energy-rich grain legume containing 40 percent protein and 19 percent oil in the seeds. The magnitude of soybean yield losses due to nutrient deficiency also varies among the nutrients. Deficiencies of N, P, Fe, B and S nutrients may cause yield losses up to 10 %, 29-45 %, 22-90 %, 100 % and 16-30 %, respectively, in soybean depending on soil fertility, climate and plant factors. Soil salinity is one of the major limiting factors of soybean production in semiarid regions, and chloride salinity has a more depressive effect on yield than sulphate salinity. The goal of nutrient management is to maximize soybean productivity while minimizing environmental consequences....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bean; Fertiliser; Plant nutrition; Yield.
Ano: 2013
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2013000200001

USE OF BIOCHAR IN AGRICULTURE
Provedor de dados: 37
Autores: SÁNCHEZ-REINOSO,Alefsi David; ÁVILA-PEDRAZA,Edgar Alvaro; RESTREPO-DÍAZ,Hermann.
ABSTRACT The objective of this review is to show how biochar (BC) can be obtained and its effects on the physicochemical properties of soils and physiological behavior of cultivated plants. Biochar is a product rich in carbon that comes from the pyrolysis of biomass, generally of vegetable origin. It is obtained by the decomposition of organic matter exposed to temperatures between 200-900 °C in an atmosphere with low oxygen availability (pyrolysis), which can be slow, intermediate or fast. BC can contain varying levels of elements such as: carbon, nitrogen, oxygen, hydrogen, and sulfur. The primary sources to produce biochar are the forest, agroindustrial, and manure residues. BC quality and physical-chemical characteristics will depend on the type of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Carbon capture; Mineralization; Plant nutrition; Pyrolysis.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000200327

More is not always better: responses of the endemic plant Vellozia nanuzae to additional nutrients
Provedor de dados: 39
Autores: Cunha-Blum,Jessica; Oki,Yumi; Solar,Ricardo; Fernandes,Geraldo Wilson.
ABSTRACT Soil nutrients are one of the main drivers of plant species composition and distribution, mainly due to the role they play in plant survival and reproductive success. However, the nutritional requirements of plants inhabiting their native ecosystems are still poorly known. This is the case for most species of campo rupestre vegetation, which are found on infertile soils of quartzitic and ferruginous origin. The present study evaluated the effects of macronutrients and substrates on survival and growth of the micro-endemic Vellozia nanuzae (Velloziaceae). Plant mortality was about 95 % higher in soil enriched with macronutrients and almost 100 % in soils with added manure in the first 30 days. Individual plants from treatments with added nutrients...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Campo rupestre; Plant nutrition; Rupestrian grasslands; Soil nutrients; Velloziaceae.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000300487

Efeito de diferentes níveis de fertirrigação nas características morfofisiológicas de espinafre - doi: 10.4025/actasciagron.v33i3.5007
Provedor de dados: 1
Autores: Biscaro, Guilherme Augusto; UFGD; Marques, Rosangela Juliana Rosa; UFGD; Batista, Camila Moreira; UFGD; Monaco, Kamila de Almeida; UFGD; Ensinas, Simone Cândido; UFGD; Rezende, Rodrigo Kelson Silva; UFGD.
Objetivou-se com esse trabalho avaliar o efeito da fertirrigação nas características morfofisiológicas de mudas de espinafre (Tetragonia tetragonoides). O experimento foi conduzido na Faculdade de Ciências Agrárias da Universidade Federal da Grande Dourados (UFGD), Dourados, Estado do Mato Grosso do Sul, utilizando-se o fertilizante líquido da marca Murer&amp;reg;. O delineamento experimental utilizado foi blocos casualizados, com seis doses do fertilizante líquido na água de irrigação (0, 1,25; 2,5; 5,0; 10,0 e 20,0 mL L-1) e quatro repetições. Realizaram-se duas fertirrigações, aos oito e 22 dias após a germinação (DAG). Foram determinadas características morfofisiológicas das plantas. Concluiu-se que as fertirrigações proporcionaram maior número de...
Tipo: Pesquisa Empírica de Campo
Palavras-chave: 5.03.02.01-9 Tetragonia tetragonoides; Nutrição de plantas; Fertilizante líquido; NPK Irrigação e Drenagem Tetragonia tetragonoides; Plant nutrition; Liquid fertilizer; NPK.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5007

Avaliação de doses e produtos corretores da acidez em variáveis biométricas na produção de mudas de maracujazeiro - DOI: 10.4025/actasciagron.v31i4.529
Provedor de dados: 1
Autores: Souza, Henrique Antunes de; UNESP; Ramos, José Darlan; UFLA; Melo, Paulo César de; UFLA; Hafle, Oscar Marianao; IFET-PB; Rodrigues, Helen Cristina de Arruda; Santos, Veronica Andrade dos; UFLA.
A utilização de produtos corretores da acidez do solo e a crescente busca por novos insumos agrícolas são de suma importância para uma agricultura sustentável e ecologicamente viável. O presente trabalho foi conduzido no viveiro de mudas do Setor de Fruticultura da Universidade Federal de Lavras, Lavras, Estado de Minas Gerais. O delineamento experimental utilizado foi blocos casualizados em esquema fatorial 3 x 4, sendo três produtos, quatro doses e três repetições, as doses foram calculadas de modo que se atingisse a saturação estabelecida, de acordo com a concentração de cada produto. As doses foram: zero, metade, completa e o dobro da dose recomendada. A incubação foi realizada para o silício e calcário, e o Lithothamnium, pela liberação rápida, foi...
Palavras-chave: 5.01.03.04-0    Produção de Mudas Passiflora spp.; Nutrição de plantas; Desenvolvimento Passiflora spp.; Plant nutrition; Development.
Ano: 2009
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/529

Effect of potassium and calcium upon the yield and fruit quality of Cucumis melo
Provedor de dados: 114
Autores: Bouzo,C. A; Céccoli,G; Muñoz,F.
The aim of this work was to study the effect of potassium and calcium in combination with nitrogen upon the yield and fruit quality of outdoor-grown melon (Cucumis melo L.). Two experiments were simultaneously performed through the use of two cultivars: 'Honey Dew Green Flesh' (Inodorus group) and 'Sivan' (Charentais group). A completely randomized experimental design was used with nine treatments resulting in a factorial arrangement of 3 x 3 due to the use of three doses of K and three doses of Ca. Doses were administered through fertigation with the injection of the fertilizers into a drip irrigation system, expressed as follows in relation to N: N:K (1.8:1.0 - 1.0:1.0 - 0.0:1.0) and Ca:N (2.0:1.0 - 1.0:1.0 - 0.0:1.0). Fertilization with nitrogen and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cucumis melo L.; Plant nutrition; Firmness; Total soluble solids.
Ano: 2018
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1668-298X2018000100003

Effects of nitrogen fertilizer input on the composition of mineral elements in corn grain
Provedor de dados: 115
Autores: Yu-kui,Rui; Shi-ling,Jiang; Fu-suo,Zhang; Jian-bo,Shen.
Excessive and inappropriate application of industrial N fertilizer can result in severe environmental and ecological problems, but whether the input of N fertilizer could affect the composition of mineral elements in corn has not been reported. Effects of input of N fertilizer on the composition of mineral elements (Se, Mo, I, Mn, Fe, Cu, Zn, Ca, Cr, K, Na, and Mg), in corn grain were investigated by ICP-MS (inductive coupling plasma-mass spectrometry). Se, I, Mn, Fe, Zn, Cr, K and Ca were significantly lower in the treatments with N fertilizer compared to a control without N fertilizer. There was a significant negative conrrelation (R) between four mineral elements and N fertilizer input: I, -0.71; Zn, -0.65; Ca, -0.75; K, -0.89. Therefore appropriate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corn grain; ICP-MS; Plant nutrition; Trace elements; Urea.
Ano: 2009
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952009000100003

Osmotic stress induced by polyethylene-glycol alters macronutrient concentrations in sugarcane (Saccharum spp.) plants in vitro
Provedor de dados: 115
Autores: Castañeda-Castro,Odón; Gómez-Merino,Fernando C.; Trejo-Téllez,Libia I.; Pastelín-Solano,Miriam C.
The potential capacity of plant roots to absorb water and nutrients generally declines in osmotic-stressed plants, presumably because of a reduction in the nutrient element demand, and such decrease varies among plant genotypes. In order to investigate the effect of the osmotic stress caused by polyethylene-glycol 6000 (PEG) on the macronutrient concentration in sugarcane (Saccharum spp.) in vitro, we established a factorial experiment with a completely randomized distribution. Study factors were variety (Mex 69-290 and CP 72-2086) and PEG in the nutrient medium (0, 3, 6 and 9 %, to generate osmotic potential corresponding to -0.18, -0.45, -0.65 and -0.80 MPa, respectively), which resulted in eight treatments, with five replicates each. The experimental...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant nutrition; Poaceae; PEG; Nitrogen; Phosphorus; Potassium.
Ano: 2015
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952015000800004

Microwave drying of plant tissue for nutritional analysis of Corymbia citriodora (Hook.) and Hevea brasiliensis Muell. Arg.
Provedor de dados: 115
Autores: Teixeira,Matheus Pozetti; Campos,Cid Naudi Silva; Prado,Renato de Mello; Caione,Gustavo; Mingotte,Fábio Luiz Checchio; Agostinho,Flavia Bastos.
Abstract The method used to dry plant tissue samples may modify its nutrient content, and results in incorrect diagnostic of crop nutritional status. The hypothesis was that microwave drying method does not affect the nutrient content of leaves neither the interpretation of the results, as compared to oven-drying procedure. In this study we evaluated the effect of microwave drying of eucalyptus (Corymbia Citriodora (Hook.)) and rubber trees (Hevea brasiliensis Muell. Arg.) leaves on dry matter and macronutrient content, as compared to oven drying. The study was performed in a laboratory at the Department of Soils and Fertilizers of Universidade Estadual Paulista “Julio de Mesquita Filho”, UNESP, Jaboticabal-SP-Brazil. The experiments were: one using leaf...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chemical analysis; Dry matter; Nutritional status; Plant material; Plant nutrition.
Ano: 2017
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952017000500555

Carbon and nutrient stocks of three Fabaceae trees used for forest restoration and subjected to fertilization in Amazonia
Provedor de dados: 42
Autores: JAQUETTI,ROBERTO K.; GONÇALVES,JOSÉ FRANCISCO C.
ABSTRACT Amazonia is crucial to global carbon cycle. Deforestation continues to be one of the main causes of the release of C into the atmosphere, but forest restoration plantations can reverse this scenario. However, there is still diffuse information about the C and nutrient stocks in the vegetation biomass. We investigated the carbon and nutrient stocks of Fabaceae trees (Inga edulis, Schizolobium amazonicum and Dipteryx odorata) subjected to fertilization treatments (T1 - no fertilization; T2 - chemical; T3 - organic; and T4 - organic and chemical fertilization) in a degraded area of the Balbina Hydroelectric Dam, AM - Brazil. As an early successional species, I. edulis stocked more C and nutrients than the other two species independent of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomass; Degraded ecosystems; Plant nutrition; Tropical tree species.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401761

Uptake and translocation of Cd and Zn in two lettuce cultivars
Provedor de dados: 42
Autores: FONTES,RENILDES L.F.; PEREIRA,JULIANA M.N.; NEVES,JULIO C.L.
Excess of heavy metals in agricultural soils is a matter of concern since it may decrease economic yield as a result of toxicity and lower product quality as a result of metal accumulation in edible plant parts. Among plant species and among cultivars within species a natural variation in uptake, translocation and distribution of trace elements occur. The transference of Cd and Zn, from soil to two lettuce (Lactuca sativa L.) cultivars grown in greenhouse, was evaluated in separate experiments for Cd and Zn.Plant dry and fresh matter yield and plant Cd and Zn concentrations were determined. Cultivar CRV showed greater potential for yield than CMM in both experiments. Cadmium and Zn translocation from roots to shoots increased with the increase of soil Cd...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cadmium; Food quality; Lettuce; Plant nutrition; Soil; Zinc.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200907

Electrical conductivity of the nutrient solution and plant density in aeroponic production of seed potato under tropical conditions (winter/spring)
Provedor de dados: 53
Autores: Calori,Alex Humberto; Factor,Thiago Leandro; Feltran,José Carlos; Watanabe,Eduardo Yuji; Moraes,Carolina Cinto de; Purquerio,Luís Felipe Villani.
ABSTRACT The recent introduction in Brazil of production of quality seed potatoes in hydroponic systems, such as aeroponics, demands studies on the nutritional and crop management. Thus, this study evaluated the influence of electrical conductivity of the nutrient solution and plant density on the seed potato minitubers production in aeroponics system. The Agata and Asterix cultivars were produced in a greenhouse under tropical conditions (winter/spring). The experimental design was a randomized block in a split-split plot design. The plot consisted of 4 electrical conductivities of the nutrient solution (1.0; 2.0; 3.0; and 4.0 dS∙m−1); the subplot, of 4 plant densities (25; 44; 66; and 100 plants∙m−2); and the subsubplot, of the 2 potato cultivars (Ágata...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Solanum tuberosum L.; Greenhouse; Pre-basic seed potato; Soilless production; Spatial arrangement; Plant nutrition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000100023

Foliar application of silicon decreases wheat blast symptoms without impairing photosynthesis
Provedor de dados: 53
Autores: Oliveira,Tassia Boeno; Aucique-Pérez,Carlos Eduardo; Rodrigues,Fabrício de Ávila.
ABSTRACT Considering the importance of blast, caused by Pyricularia oryzae, to impact wheat yield, this study investigated whether the foliar spray of potassium silicate (PS) could affect the photosynthesis of wheat plants and its potential to reduce disease symptoms. The Exp. 1 aimed to determine the effect of the foliar spray of PS on the photosynthetic performance of plants and was arranged in a completely randomized design with six treatments (plants sprayed with PS rates of 2.5, 5.0, 7.5, 10.0, and 12.5 g·L-1 at 35 days after emergence) and six replications. The leaf gas exchange (net CO2 assimilation rate (A), internal CO2 concentration (Ci), stomatal conductance to water vapor (gs), and transpiration rate (E)) as well as fluorescence of chlorophyll...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum L; Disease control; Fungal disease; Plant nutrition.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300423

Evaluation of common bean genotypes for phosphorus use efficiency in Eutrophic Oxisol
Provedor de dados: 53
Autores: Silva,Daiana Alves da; Esteves,Jose Antonio de Fatima; Gonçalves,João Guilherme Ribeiro; Azevedo,Cleber Vinícius Giaretta; Ribeiro,Tamires; Chiorato,Alisson Fernando; Carbonell,Sérgio Augusto Morais.
ABSTRACT Common bean is one of the most important legumes in Latin America, mostly grown in soils with low phosphorus (P) availability. Thus, this study aimed to evaluate the responses of 20 bean genotypes to P deficiency. The experiment was a completely randomized design in a 2 × 20 factorial arrangement; the first factor consisted of P levels and the second factor, of 20 bean genotypes, with six replications. The substrate was a Red Eutrophic Oxisol with low P content. For application of the P treatments, it was applied simple superphosphate, consisting of two levels: restrictive and control, with the application of 45 and 90 kg∙ha–1 of P2O5, respectively. At 28 days, we observed the first symptoms of nutrient deficiency, with the decrease in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Abiotic stress; Plant nutrition; Genotype classification.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000200152

Effects of silicon on the penetration and reproduction events of Meloidogyne exigua on coffee roots
Provedor de dados: 53
Autores: Silva,Rodrigo Vieira; Oliveira,Rosângela D’Arc de Lima; Ferreira,Patrícia da Silva; Castro,Douglas Barbosa; Rodrigues,Fabrício Ávila.
Considering that the root-knot nematode Meloidogyne exigua has caused great yield losses to coffee production in Brazil, this study aimed to determine whether the penetration and the reproduction events of this nematode on the roots of plants from two coffee cultivars with different levels of basal resistance to this nematode could be affected by silicon (Si). Coffee plants from the cultivars Catuaí and IAPAR 59, which are susceptible and resistant, respectively, to M. exigua, were grown in pots containing Si-deficient soil that was amended with either calcium silicate (+Si) or calcium carbonate (–Si). The Si concentration on the root tissue significantly increased by 159 and 97% for the +Si plants from the cultivars Catuaí and IAPAR 59, respectively,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica; Host resistance; Plant nutrition; Root-knot nematode.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000200196

Potassium-modulated physiological performance of mango plants infected by Ceratocystis fimbriata
Provedor de dados: 53
Autores: Cacique,Isaias Severino; Bispo,Wilka Messner Silva; Araujo,Leonardo; Aucique-Pérez,Carlos Eduardo; Rios,Jonas Alberto; Silva,Leandro Castro; Rodrigues,Fabrício Ávila.
ABSTRACT Mango wilt, caused by the fungus Ceratocystis fimbriata, is an important disease affecting mango production. In view of the beneficial effects of potassium (K) in other profitable crops and the lack of information about the effect of macronutrients on mango wilt development, the present study aimed to evaluate how mango plants supplied with K respond physiologically when infected by C. fimbriata. Mango plants (» 3 years old) from cultivar Ubá were grown in plastic pots containing 58 mg of K·dm−3 (original K level based on the chemical analysis of the substrate) or in plastic pots with substrate amended with a solution of 0.5 M potassium chloride (KCl) to achieve the rate of 240 mg K·dm−3. Disease symptoms were more pronounced in inoculated plants...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mangifera indica; Gas exchange; Host defense; Mango wilt; Plant nutrition; Vascular disease.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000400521

Nutritional status of rice plants supplied with silicon in response to Pyricularia oryzae infection
Provedor de dados: 53
Autores: Domiciano,Gisele Pereira; Araujo,Leonardo; Duarte,Henrique Silva Silveira; Freitas,Cecilia Chagas; Einhardt,Andersom Milech; Rodrigues,Fabrício Ávila.
ABSTRACT Considering the importance of silicon (Si) to increase rice resistance to blast, this study investigated the nutritional status of rice plants supplied with this element in response to Pyricularia oryzae infection. Plants were grown in nutrient solutions containing 0 and 2 mmol·L-1 of Si (referred to -Si and +Si plants, respectively). The area under blast progress curve decreased for +Si plants due to a significant increase of 714% on the foliar Si concentration in contrast to -Si plants. For +Si plants, the foliar N, P, K, Ca, Mg, Cu, and B concentrations were significantly lower in comparison to -Si plants. On infected plants, the foliar N, K, and Cu concentrations were significantly lower in comparison to noninfected ones. The foliar Zn, Fe,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Foliar disease; Host resistance; Plant nutrition.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000400573

Factors affecting herbivory of Thrips palmi (Thysanoptera: Thripidae) and Aphis gossypii (Homoptera: Aphididae) on the eggplant (Solanum melongena)
Provedor de dados: 52
Autores: Leite,Germano Leão Demolin; Picanço,Marcelo; Zanuncio,José Cola; Ecole,Carvalho Carlos.
The objective of this study was to evaluate effects of total rainfall, mean temperature, natural enemies, chemical composition of leaves, levels of nitrogen and potassium on leaves and density of leaf trichomes on attack intensity of Thrips palmi Karny (Thysanoptera: Thripidae) and Aphis gossypii (Glover) (Homoptera: Aphididae) on plantations of the eggplant (Solanum melongena) in two regions of Minas Gerais, Brazil. Higher numbers of A. gossypii/leaf and T. palmi/leaf were observed in plantations of this eggplant in the Municipalities of Viçosa and Guidoval, respectively. Guidoval had a rainy and hotter weather than Viçosa. T. palmi was almost positivelly correlated with rainfall (r= 0.49, P= 0.0538) while A. gossypii seemed to be more affected by mean...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aphis gossypii; Natural enemies; Plant nutrition; Solanum melongena; Thrips palmi.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000400002

Strategies to increase zinc deficiency tolerance and homeostasis in plants
Provedor de dados: 61
Autores: Henriques,Ariadne Ribeiro; Chalfun-Junior,Antonio; Aarts,Mark.
Zinc deficiency is a global problem of considerable importance for agriculture and human health. Under zinc deficiency conditions, many essential zinc-dependent physiological functions are unable to operate normally, and the cellular homeostasis is adversely affected. This paper described the potential damages that low-zinc bioavailability in soil can have for plants, humans, and animals. In addition, current knowledge on physiological and molecular aspects of zinc homeostasis in plants and strategies used to increase zinc deficiency tolerance were discussed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofortification; Mineral nutrition; Plant abiotic stress; Plant nutrition.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000100002

Physiological Dose-Response of Coffee (Coffea arabica L.) Plants to Glyphosate Depends on Growth Stage
Provedor de dados: 117
Autores: de Carvalho,Leonardo Bianco; Aguiar Alves,Pedro Luis da Costa; Bianco,Silvano; De Prado,Rafael.
Glyphosate is the main herbicide used in coffee (Coffea arabica L.) plantations in Brazil. Problems with herbicide drift commonly occur in orchard fields due to non-adequate spraying conditions. A series of experiments was carried out aiming to evaluate physiological dose-response of C. arabica plants submitted to exposure to simulated glyphosate drift in two distinct plant growth stages. Glyphosate was applied at 0, 180, 360, and 720 g acid equivalent (AE) ha-1 directly on coffee plants with 10 and 45 d after transplanting (DAT). Glyphosate doses in a range of 180-360 g AE ha-1 increased photosynthesis, transpiration and stomatal conductance in 10 DAT-plants up to 14 d after application (DAA) while, in 45 DAT-plants, an increase was observed only up to 2...
Tipo: Journal article
Palavras-chave: N-(phosphonomethyl) glycine; Herbicide drift; Photosynthesis; Plant nutrition.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000200003

Iron doses in the production of potted rosebushes
Provedor de dados: 65
Autores: Zanão Júnior,Luiz Antônio; Carvalho-Zanão,Maristela Pereira; Pereira,Natália; Grossi,José Antônio Saraiva; Santos,Reginaldo Ferreira.
ABSTRACT: The production and quality of roses are influenced by fertilization management. The aim of this experiment was to evaluate the effects of doses of iron (Fe) in the production of potted rose bushes ( Rosa hybrida ). Treatments were based on five doses of Fe (0, 1, 3, 5 and 15mg kg-1) applied on the substrate, in a randomized block design with four replications. Seedlings presented two pairs of leaves and were individually transplanted into plastic pots (0.8dm3) containing commercial substrate. Each experimental plot consisted of a vase with a plant with two flower stalks. The following parameters were evaluated: number of leaves and flowers per flower stalk; dry matter production of roots, leaves and flowers; plant height and diameter and floral...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rosa hybrida; Floriculture; Plant nutrition.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300251

Growth of rice plants in an Acrustox fertilized with silicon and manganese
Provedor de dados: 65
Autores: Zanão Júnior,Luiz Antônio; Fontes,Renildes Lúcio Ferreira; Korndörfer,Gaspar Henrique; Ávila,Vinícius Tavares de; Carvalho-Zanão,Maristela Pereira.
The objective of this research was to study the biomass production, plant architecture and Si and Mn uptake in rice plants cultivated in a Acrustox fertilized with silicon and manganese. The experiment was carried out in a greenhouse using a 2x5 factorial (0 and 1000mg dm-3 Si x 0, 4, 12, 16 and 20mg dm-3 Mn) with four replications, in a randomized block design. The application of Si to the soil resulted in a smaller leaf insertion angle, a greater Si content in the leaves and roots and biomass production. Moreover, Si caused the decrease content of Mn in leaves and its increase in roots. With the rising dose of Mn, there was an increase in the content of this element in soil, roots and leaves, regardless of the Si application and reduction in biomass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Oryza sativa L.; Silicate; Oxisol; Plant nutrition.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010001100024

Nitrogen and phosphorus uptake efficiency in Indian mustard cultivated during three growth cycles in a copper contaminated soil treated with biochar
Provedor de dados: 65
Autores: Gonzaga,Maria Isidória Silva; Souza,Danyelle Chaves Figueiredo de; Almeida,André Quintão de; Mackowiak,Cheryl; Lima,Idamar da Silva; Santos,José Carlos de Jesus; Andrade,Raquel Santos de.
ABSTRACT:  Biochar has been used worldwide as an efficient soil amendment due to its beneficial interaction with soil particles and nutrients; however, studies on the effect of biochar on the availability of nutrients such as N and P in tropical soils are still missing. The objective of the study was to evaluate the effect of different types and doses of biochars on the concentration and uptake of N and P in Indian mustard plants (Brassica juncea L.) grown in a Cu contaminated soil during three successive growth cycles. The greenhouse experiment was set up as randomized block design in a 3x3 factorial scheme, with 3 types of biochars (coconut shell, orange bagasse and sewage sludge) and three rates of application (0, 30 and 60t ha-1), and 4 replicates....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biochar; Pyrogenic carbon; Copper contamination; Plant nutrition; Brassica juncea.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000100250

Development of clonal matrices of australian red cedar in different substrates under fertilizer doses
Provedor de dados: 64
Autores: Benatti,Bruno Peres; Furtini Neto,Antonio Eduardo; Moretti,Bruno da Silva; Stehling,Eduardo de Castro; Sousa,Thaiana Marinha Almeida de.
In order to evaluate fertilizers doses in different substrates for growth and development of clonal matrices of Australian Red Cedar [Toona ciliata var. australis (F. Muell.) Bahadur], an experiment was conducted in a greenhouse. Five substrates were evaluate, with proportions by volume, the first consisting of 100% of Multiplant florestal®, the second of 50% vermiculite, 20% carbonized rice hulls, 20% soil and 10% coconut fiber, the third with 50% soil and 50% sand, the fourth was composed by 50% Multiplant florestal®, 10% soil and 40% coconut fiber and the fifth with 65% of Multiplant florestal®, 25% vermiculite and 10% carbonized rice hulls. The fertilizers doses applied were 0.0; 0.3; 0.6; 1.2; 2.4 of fertilization suggested by Malavolta (1980) for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Toona ciliata; Plant nutrition; Fertilization.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000300003

Phosphite as phosphorus source to grain yield of common bean plants grown in soils under low or adequate phosphate availability
Provedor de dados: 64
Autores: Ávila,Fabricio William; Faquin,Valdemar; Silva,Douglas Ramos Guelfi; Bastos,Carla Elisa Alves; Oliveira,Nilma Portela; Soares,Danilo Araújo.
The effects of foliar and soil applied phosphite on grain yield in common bean (Phaseolus vulgaris L.) grown in a weathered soil under low and adequate phosphate availability were evaluated. In the first experiment, treatments were composed of a 2 x 7 + 2 factorial scheme, with 2 soil P levels supplied as phosphate (40 e 200 mg P dm-3 soil), 7 soil P levels supplied as phosphite (0-100 mg P dm-3 soil), and 2 additional treatments (without P supply in soil, and all P supplied as phosphite). In the second experiment, treatments were composed of a 2 x 3 x 2 factorial scheme, with 2 soil phosphate levels (40 e 200 mg P dm-3 soil), combined with 3 nutrient sources applied via foliar sprays (potassium phosphite, potassium phosphate, and potassium chloride as a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phaseolus vulgaris; Tropical soil; Foliar fertilizer; Plant nutrition.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542012000600006

Yield per plant and other characteristics of soybean plants treated with kinetin and potassium nitrate
Provedor de dados: 64
Autores: Passos,Alexandre Martins Abdão dos; Rezende,Pedro Milanez de; Alvarenga,Amauri Alves de; Baliza,Danielle Pereira; Carvalho,Everson Reis; Alcântara,Hélio Perez de.
The study aimed to evaluate the effect of kinetin and potassium nitrate applied to leaves, at the R3 phenological phase, on some agronomic characteristics of soybean plants and their yield per plant in the field. The experiment was carried out in Itutinga, MG, using five kinetin concentrations (0, 250, 500, 750 and 1.000 mg kinetin ha-1) combined with four potassium nitrate concentrations (0, 5, 10 and 15 kg ha-1) in a factorial scheme using a randomized block experimental design, with three replications. The positioning of numbers of pods per plant was evaluated in three positions in the canopy: lower, middle and upper. The application of potassium nitrate did not influence the studied characteristics. Kinetin increased the total set pod number by 27.4%...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glycine max; Cytokinin; Plant growth substances; Plant nutrition.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000500014