Data/hora: 21/06/2024 12:08:41

Biblioteca(s): | Embrapa Arroz e Feijão.
Data corrente: | 07/03/2016
Data da última atualização: | 17/01/2020
Autoria: | FAGERIA, N. K.
Afiliação: | NAND KUMAR FAGERIA, CNPAF.
Título: | Lowland rice genotypes evaluation for potassium-use efficiency.
Ano de publicação: | 2015
Fonte/Imprenta: | Communications in Soil Science and Plant Analysis, New York, v. 46, n. 13, p. 1628-1635, 2015.
Idioma: | Inglês
Conteúdo: | Lowland rice significantly contributes to world as well as Brazilian rice production and information on genotypes potassium-use efficiency is limited. A greenhouse experiment was conducted with the objective to evaluate lowland rice genotypes for potassium (K)?use efficiency. Ten genotypes were evaluated at 0 mg K kg&#8722;1 (low) and 200 mg K kg&#8722;1 (high) of soil. Grain yield and shoot dry weight were significantly affected by K as well as genotype treatments. Genotypes CNAi 8860, CNAi 8859, BRS Fronteira, and BRS Alvorada were the best in relation to K-use efficiency because they produced best grain yield at low as well as at higher K levels. Shoot dry weight, number of panicles per pot, and 1000-grain weight had highly significant (P < 0.01) association with grain yield. Spikelet sterility, however, had significant negative association with grain yield. These plant parameters were mainly influenced by genotypes, indicating importance of selecting appropriate genetic material for improving grain yield. Soil K depletion was significant at harvest, suggesting large amount of K uptake by lowland rice genotypes.
Thesagro: | Arroz; Genótipo; Oryza sativa; Potássio.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (34084-1) - UPC - AP - DD - 2015 -  - 2015 - DIS