Data/hora: 01/06/2024 13:41:52

Biblioteca(s): | Embrapa Arroz e Feijão.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | B - 1
Data corrente: | 18/02/2016
Data da última atualização: | 13/09/2019
Autoria: | FAGERIA, N. K.; SANTOS, A. B. dos.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; ALBERTO BAETA DOS SANTOS, CNPAF.
Título: | Agronomic evaluation of lowland rice genotypes for potassium-use efficiency.
Ano de publicação: | 2015
Fonte/Imprenta: | Communications in Soil Science and Plant Analysis, New York, v. 46, n. 11, p. 1327-1344, 2015.
DOI: | 10.1080/00103624.2015.1033535
Idioma: | Inglês
Conteúdo: | Lowland rice is an important crop for humans, and information on potassium (K)?use efficiency for this crop is limited. A greenhouse experiment was conducted to evaluate agronomic characteristics of 12 lowland rice genotypes for K utilization. The K levels used were 0 mg kg&#8722;1 (low, natural level of soil) and 300 mg kg&#8722;1 (high). Plant height, straw yield, grain yield, panicle number, grain harvest index, 1000-grain weight, and spikelet sterility were significantly affected by K and genotypes treatments. The K × genotype interactions were significant for most of these growth, yield, and yield components, indicating that genotypes responded differently under two K rates. Furthermore, selection is possible for low as well as high K rates for lowland rice genotypes. Contribution of growth and yield components and agronomic efficiency in improving grain yield was in the order of agronomic efficiency > grain harvest index> 1000-grain weight > panicle number > shoot dry weight. There was significant decrease in soil K at harvest at low as well as at high K levels, indicating greater K requirements for lowland rice genotypes. Further, rice genotypes were significantly different in uptake and utilization of P, K, Al, and H+Al, as indicated by soil analysis at harvest.
Thesagro: | Arroz; Genótipo; Oryza sativa; Potássio; Raíz.
Thesaurus Nal: | Grain yield; Rice; Roots; Yield components.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (33932-1) - UPC - AP - DD - 2015 -  - 2015 - DIS