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| Registros recuperados: 248 | |
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| 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 |
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| 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 |
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| LOPES, M. N.; CÂNDIDO, M. J. D.; SILVEIRA, W. M.; MARANHÃO, T. D.; SOARES, I.; POMPEU, R. C. F. F.; SILVA, R. G. da; CARNEIRO, M. S. de S.. |
| Abstract: The present study evaluated the accumulation and export of nutrients in cactus pear (Opuntia ficus-indica) cv. Gigante, fertilized with combinations of nitrogen (10, 70, 100, 130, and 190 kg ha -1 year -1 N) and phosphorus (10, 70, 100, 130, and 190 kg ha -1 year -1 P2O5) under annual and biennial harvests, in Quixadá and Tejuçuoca, using a split-plot randomized block design with four replications. In Quixadá, under annual and biennial harvests, the following orders of accumulation of macronutrients (in kg ha -1 year -1) were found, respectively: K (98.8) > Ca (87.2) > N (46.7) > Mg (26.8) > S (18.4) > P (2.04) and Ca (33.5) > K (31.1) > S (18.6) > N (12.9) > Mg (10.5) > P (0.81). In Tejuçuoca, under annual and... |
| Tipo: Artigo de periódico |
Palavras-chave: Harvest frequency; Fertilization; Nutritional demand; Acúmulo de macronutriente; Palma Forrageira; Nutrição Vegetal; Nutriente; Crescimento; Macroelemento; Exigência Nutricional; Plant nutrition; Plant micronutrients; Nutrient requirements. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1094339 |
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| MARANHÃO, T. D.; CÂNDIDO, M. J. D.; SOARES, I.; LOPES, M. N.; SILVA, R. R. da; POMPEU, R. C. F. F.; LACERDA, G. F.; SOUSA, W. do N.. |
| Abstract: The objective of this study was to evaluate the macronutrient accumulations in leaf, stem, and shoot of elephant grass cv. Roxo. The treatments consisted of seven growth ages (9, 18, 27, 36, 45, 54, and 63 days) and three growing seasons (rainy, transition, and dry). A completely randomized design and a split-plot time arrangement were used, where the ages were the plots and the seasons the subplots, with three replications. Interaction between the factors age and season of cultivation for the contents and the daily accumulation rates of N, P, K, Ca, Mg, and S in leaf, stem, and shoot fractions were calculated. The margins of daily accumulation of nutrients N, P, K, Mg, and S presented positive linear behavior in all seasons studied; however,... |
| Tipo: Artigo de periódico |
Palavras-chave: Mineral nutrition; Nutrição mineral; Marcha de absorção; Absorption run; Macronutriente; Capim Elefante; Pennisetum Purpureum; Macroelemento; Nutriente; Absorção de Nutrientes; Nutrição Vegetal; Plant nutrition; Nutrients; Seasons. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1097057 |
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| SILVA, A. C. P. da; BORGES, A. L.; COELHO, E. F.. |
| A bananeira cv. D´Angola demanda grandes quantidades de nutrientes para seu desenvolvimento e produção. Para uma recomendação adequada de fertilizantes, é importante que se conheçam as quantidades de nutrientes absorvidas, exportadas e restituídas ao solo pela planta. Objetivou-se avaliar os acúmulos de fitomassa e macronutrientes na bananeira cv. D´Angola (tipo Terra), em cinco doses de nitrogênio (N) aplicado em fertirrigação por gotejamento. O trabalho foi desenvolvido no campo da Embrapa Mandioca e Fruticultura, no município de Cruz das Almas-BA, em delineamento experimental em blocos casualizados, com quatro repetições. Avaliaram-se a fitomassa e o acúmulo de nutrientes em cinco órgãos da planta (pseudocaule, folhas, frutos, engaço e coração), em... |
| Tipo: Separatas |
Palavras-chave: Banana; Irrigação; Macroelemento; Irrigation; Plant nutrition. |
| Ano: 2015 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1027767 |
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| OLIVEIRA, I. R. de; CARVALHO, H. W. L. de; CARVALHO, C. G. P.; TABOSA, J. N.; LIRA, M. A.; FERREIRA, F. M. de B.; SANTOS, M. L. dos; RODRIGUES, C. S.. |
| O objetivo deste trabalho foi verificar a adaptabilidade e a estabilidade de cultivares de girassol da rede de Ensaio Final de Segundo Ano, no Agreste Nordestino, no ano agrícola de 2009. Estas cultivares foram submetidas a diferentes ambientes do Nordeste brasileiro, para fins de recomendação. Para isso, os ensaios foram instalados nos estados de Sergipe, Alagoas e Rio Grande do Norte. Utilizou-se o delineamento experimental em blocos ao acaso, com quatro repetições de dezoito tratamentos. As cultivares V 20041, M 734, BRS GIRA 06, EXP 1452 CL e TRITON MAX justificaram suas recomendações para as condições de ambientes favoráveis. Por outro lado, a cultivar NEON se destacou para as condições de ambientes não favoráveis. As cultivares BRS GIRA 26, HLS 07,... |
| Tipo: Separatas |
Palavras-chave: Girassol; Meio ambiente; Condição ambiental; Helianthus Annuus.; Plant nutrition; Environmental factors.. |
| Ano: 2010 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/871643 |
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| ARAUJO, J. M. de. |
| A produção de mudas é um processo fundamental para sucesso de um pomar e, durante esse período, a planta requer condições favoráveis ao seu desenvolvimento. O objetivo deste trabalho foi avaliar o efeito do adubo de liberação lenta e diferentes condições de ambiente na produção de mudas de açaizeiro. O experimento foi instalado e conduzido no Campo Experimental da Embrapa Acre, no delineamento em blocos causalizados, no esquema fatorial 5x4 com três repetições e 10 plantas por parcela. Os tratamentos foram constituídos por cinco doses de adubo de liberação lenta (0 kg.m-3, 2,5 kg.m-3, 5 kg.m-3, 7,5 kg.m-3 e 10 kg.m-3) combinados com quatro ambientes de cultivo representados por sombreamentos de 20%, 30%, 50% e 75%, totalizando 20 tratamentos. Foram... |
| Tipo: Teses |
Palavras-chave: Embrapa Acre; Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Aclimatación; Factores ambientales; Nutrición de las plantas; Producción de plántulas; Reproducción de las plantas; Fertilizantes de acción retardada; Propagação vegetativa; Açaí; Euterpe oleracea; Muda; Produção; Variedade resistente; Aclimatação; Condição ambiental; Nutrição vegetal; Análise foliar; Campo Experimental; Plant reproduction; Seedling production; Acclimation; Environmental factors; Plant nutrition; Slow-release fertilizers. |
| Ano: 2017 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1079211 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 248 | |
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