Data/hora: 16/06/2024 17:36:58

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	06/05/2014	
Data da última atualização: 	26/05/2014	
Autoria: 	FAGERIA, N. K.	
Afiliação: 	NAND KUMAR FAGERIA, CNPAF.	
Título: 	Yield and yield components and phosphorus use efficiency of lowland rice genotypes.	
Ano de publicação: 	2014	
Fonte/Imprenta: 	Journal of Plant Nutrition, New York, v. 37, n. 7, p. 979-989, June 2014.	
DOI: 	10.1080/01904167.2014.888735	
Idioma: 	Inglês	
Conteúdo: 	Phosphorus deficiency is main constraints for lowland rice production in various rice producing regions of the world. A greenhouse experiment was conducted using lowland (Inceptisol) soil with the objective to determine response of seven lowland rice (Oryza sativa L.) genotypes to phosphorus fertilization and to evaluate their phosphorus (P) use efficiency. Phosphorus treatments included control (0 mg P kg&#8722;1) and 200 mg P kg&#8722;1 of soil. Plant height and shoot dry weight were significantly (P < 0.001) influenced by P treatments. Phosphorus X genotypes interaction was significant for shoot dry weight, indicating different response of genotypes under two P levels. At low P level, none of the genotypes produced grain yield, indicating original P level in the soil was too low for lowland rice yield. However, genotypes differed significantly in grain yield at high P level. Panicle number, panicle length, and thousand grains weight had a significant quadratic association with grain yield. However, spikelet sterility had a significant linear negative association with grain yield. The P use efficiency expressed as agronomic efficiency (AE), physiological efficiency (PE), agro-physiological efficiency (AP), apparent recovery efficiency (ARE), and utilization (UE) were significantly different among genotypes. These efficiencies were having significantly positive association with grain yield, with exception to ARE, indicating improving grain yield with improved P use efficiencies in rice.	
Thesagro: 	Arroz; Fósforo; Genótipo; Nutriente; Oryza sativa.	
Thesaurus Nal: 	Grain yield; Harvest index; Nutrient use efficiency; Oxisols; Phosphorus; Rice.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (32642-1) - UPC - AP - DD - 2014.010 -  - 2014.010 - DIS