Data/hora: 22/06/2024 01:50:57

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