Data/hora: 17/06/2024 17:13:06

Biblioteca(s): 	Embrapa Arroz e Feijão.	
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