Data/hora: 06/06/2024 02:16:09

Biblioteca(s): | Embrapa Arroz e Feijão; Embrapa Milho e Sorgo.
Data corrente: | 05/08/2013
Data da última atualização: | 09/01/2020
Autoria: | FAGERIA, N. K.; MORAES, O. P.; VASCONCELOS, M. J.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; ORLANDO PEIXOTO DE MORAIS, CNPAF; MARIA JOSE VILACA DE VASCONCELOS, CNPMS.
Título: | Upland rice genotypes evaluation for phosphorus use efficiency.
Ano de publicação: | 2013
Fonte/Imprenta: | Journal of Plant Nutrition, New York, v. 36, n. 12, p. 1868-1880, Oct. 2013.
DOI: | 10.1080/01904167.2013.818153
Idioma: | Inglês
Conteúdo: | Phosphorus (P) deficiency is one of the most yield limiting factors in crop production in Brazil ian Oxisols. A greenhouse experiment was conducted to evaluate upland rice genotypes at low (25 mg P kg-1) and high (200 mg P kg-1) P levels applied to a Brazilian Oxisol. Grain yield and yield components were significantly influenced by P level and genotype treatments. There was a significant interaction between P level and genotype treatments in relation to grain yield, indicating genotypes responded differently under two P levels. Based on grain yield efficiency index (GYEI), genotypes were classified into efficient, moderately efficient and inefficient groups. The efficient genotypes in utilizing P were 'BRA052053', 'BRS Primavera', 'BRA052015', 'BRA052023', 'BRA01506', 'BRA052045', 'BRA032033', 'BRA01596' and 'BRA052034'. Remaining genotypes were classified as moderately efficient in P use efficiency. None of the genotypes were fall into inefficient group. Grain yield was significantly and positively related with shoot dry weight, panicle number, grain harvest index, 1000-grain weight and had a negative and significant correlation with spikelet sterility. Grain weight was having maximum contribution in total rice plant weight comparing to root and shoot, indicating improvement in harvest index of modern Brazilian upland rice cultivars by breeding.
Thesagro: | Arroz; Crescimento; Fósforo; Genótipo; Oryza sativa; Raíz.
Thesaurus Nal: | Grain yield; Oxisols; Rice; Root growth.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Arroz e Feijão (CNPAF)

Exemplares:

CNPAF - (32232-1) - UPC - AP - DD - 2013.040 -  - 2013.040 - DIS
CNPMS - (25504-1) - UPC - AP - DD -  -  -  - DIS