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| Registros recuperados: 162 | |
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| 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 |
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| 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 |
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| 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®. 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 |
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| 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... |
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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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 162 | |
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