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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
05/10/2017 |
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Data da última atualização: |
05/10/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BALIGAR, V. C.; FAGERIA, N. K. |
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Afiliação: |
V. C. BALIGAR, USDA; NAND KUMAR FAGERIA, CNPAF. |
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Título: |
Influence of nitrogen forms and levels on the growth and nutrition of cacao. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Journal of Plant Nutrition, New York, v. 40, n. 5, p. 709-718, 2017. |
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ISSN: |
0190-4167 |
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DOI: |
10.1080/01904167.2016.1262401 |
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Idioma: |
Inglês |
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Conteúdo: |
Ammonium and nitrate are the major forms of nitrogen (N) present in tropical soils. An experiment was conducted to assess the influence of nitrate and ammonium forms (N03-, NH4+, and mix of N03- + NH4+), and levels (1.5-12.0 mM) of N on the growth and nutrition of cacao (Theobroma cacao L). Growth parameters were significantly influenced by N forms, and nitrogen supplied as NH4+ proved better for the growth of cacao compared with N03- form and mixtures of these two forms. Irrespective of the forms of N, levels of N had no significant effect on plant growth parameters. Nutrient efficiency ratios (NERs)(shoot dry matter produced per unit of nutrient uptake) for macronutrients were sulfur» phosphorus» calcium> magnesium> nitrogen > potassium (S>p> Ca» Mg> N> K) and for micronutrients NERs were in the order of copper» boron» zinc» ironc- manganese (Cu» B> Zn> Fe>Mn). |
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Thesagro: |
Cacau; Microelemento; Nitrogênio. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
null
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
