Data/hora: 23/09/2024 16:03:56

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	31/10/1994	
Data da última atualização: 	25/06/2020	
Autoria: 	FAGERIA, N. K.	
Afiliação: 	NAND KUMAR FAGERIA, CNPAF.	
Título: 	Response of cowpea to phosphorus on an oxisol with special reference to dry matter production and mineral ion contents.	
Ano de publicação: 	1991	
Fonte/Imprenta: 	Tropical Agriculture, v. 68, n. 4, p. 384-388, 1991.	
Idioma: 	Inglês	
Conteúdo: 	The objective of this investigation was to evaluate the effects of P fertilization on growth, yield and nutrient uptake pattems in cowpea. Phosphorus application significantly increased growth, yield and yield components. The critical soil-applied P leveI was 160 mg kg-1 of soil for seed yield and 142-150 mg P kg-1 of soil for yield components. The criticallevel of soil P extracted for seed yield was 40 mg kg-1 of soil and the plant tissue critical level was 0.13% at harvest. Analyses of nutrient distributions in different plant parts showed that cowpea roots retained maximum Fe and minimum K and Ca. Tops retained maximum Ca, almost 50% of P, K and Mg and 65% of Mn; large amounts of P, K, Zn and Cu were translocated to seeds. Pod husks contained a high leveI of Mg and Cu. Phosphorus fertilization decreased the concentrations of K, Zn and Cu in plant tops. Magnesium concentration was increased with P fertilization; Ca and Fe concentrations were unaffected.	
Palavras-Chave: 	Caupi.	
Thesagro: 	Fósforo; Oxisol; Solo; Vigna Unguiculata.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (6900-1) - UPC - AP - PP - 1991 -  - 1991 - DIS