Data/hora: 19/06/2024 13:06:50

Biblioteca(s): | Embrapa Arroz e Feijão.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 2
Data corrente: | 31/10/2013
Data da última atualização: | 26/03/2014
Autoria: | FAGERIA, N. K.; KNUPP, A. M.; MORAES, M. F.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; ADRIANO MOREIRA KNUPP, CNPAF; M. F. MORAES, UNIVERSIDADE FEDERAL DO MATO GROSSO, Barra do Garças.
Título: | Phosphorus nutrition of lowland rice in tropical lowland soil.
Ano de publicação: | 2013
Fonte/Imprenta: | Communications in Soil Science and Plant Analysis, New York, v. 44, n. 20, p. 2932-2940, 2013.
ISSN: | 0010-3624
DOI: | 10.1080/00103624.2013.829485
Idioma: | Inglês
Conteúdo: | Rice is a main food crop for about half of the world?s population, and phosphorus (P) is the main limiting nutrient in rice production in tropical lowlands. A greenhouse experiment was conducted to evaluate P requirements of lowland rice grown on a lowland soil (Inceptisol). Dry matter, grain yield, and yield-attributing characteristics were significantly (P < 0.01) influenced by P fertilization. Based on quadratic response, maximum shoot dry weight and grain yield were obtained with the application of 190 mg P kg&#8722;1 of soil. Maximum panicle, tiller number, and plant height were obtained with the application of 177 192, and 175 mg P kg&#8722;1 of soil, respectively. Mehlich 1?extractable P for maximum grain yield was 15.6 mg kg&#8722;1 of soil. Variability in grain yield with plant growth and yield parameters was in the order of tiller > shoot dry weight > panicle number > spikelet sterility > plant height > grain harvest index > panicle length > weight of 1000 grains. Phosphorus uptake in shoot and concentration and uptake in grain significantly (P < 0.01) increased grain yield. However, variability in grain yield was greater with concentration and uptake of P in the grain. Similarly, P harvest index was also significantly associated with grain yield. Agronomic P-use efficiency, apparent P-recovery efficiency, and P-utilization efficiency decreased quadratically with increasing P rates, whereas physiological P-use efficiency increased quadratically and agrophysiological P-use efficiency decreased linearly with increasing P rates. Agrophysiological and utilization P-use efficiencies had significant positive correlation with grain yield.
Thesagro: | Arroz; Fósforo; Oryza sativa; Solo.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (32373-1) - UPC - AP - DD - 2013.064 -  - 2013.064 - DIS