Data/hora: 06/06/2024 02:01:56

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	05/10/2017	
Data da última atualização: 	05/10/2017	
Autoria: 	BALIGAR, V. C.; FAGERIA, N. K.	
Afiliação: 	V. C. BALIGAR, USDA; NAND KUMAR FAGERIA, CNPAF.	
Título: 	Influence of nitrogen forms and levels on the growth and nutrition of cacao.	
Ano de publicação: 	2017	
Fonte/Imprenta: 	Journal of Plant Nutrition, New York, v. 40, n. 5, p. 709-718, 2017.	
ISSN: 	0190-4167	
DOI: 	10.1080/01904167.2016.1262401	
Idioma: 	Inglês	
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).	
Thesagro: 	Cacau; Microelemento; Nitrogênio.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (34824-1) - UPC - AP - DD - 2017 -  - 2017 - DIS