Data/hora: 20/06/2024 15:47:47

Biblioteca(s): 	Embrapa Arroz e Feijão; Embrapa Milho e Sorgo.	
Data corrente: 	27/03/2014	
Data da última atualização: 	26/05/2014	
Autoria: 	FAGERIA, N. K.; MORAIS, O. P. de; SANTOS, A. B. dos; VASCONCELOS, M. J.	
Afiliação: 	NAND KUMAR FAGERIA, CNPAF; ORLANDO PEIXOTO DE MORAIS, CNPAF; ALBERTO BAETA DOS SANTOS, CNPAF; MARIA JOSE VILACA DE VASCONCELOS, CNPMS.	
Título: 	Phosphorus use efficiency in upland rice genotypes under field conditions.	
Ano de publicação: 	2014	
Fonte/Imprenta: 	Journal of Plant Nutrition, New York, v. 37, n. 5, p. 633-642, Apr. 2014.	
DOI: 	10.1080/01904167.2013.867977	
Idioma: 	Inglês	
Conteúdo: 	Phosphorus (P) deficiency is one of the most yield limiting factors for crop production in South American soils. Upland rice (Oryza sativa L.) is an important crop in South American cropping systems, including Brazil. A field experiment was conducted with the objective to evaluate 20 upland rice genotypes for phosphorus (P) use efficiency. The P rate used was low (0 kg P ha&#8722;1) and high [87 kg P ha&#8722;1 or 200 kg phosphorus pentoxide (P2O5) ha&#8722;1]. Plant height, shoot dry weight, grain yield, panicle number, 1000 grain weight, spikelet sterility, and grain harvest index were significantly influenced by P and genotype treatments. The P X genotype interaction was significant for grain yield, indicating that genotypes responded differently under two P rates. Overall, grain yield increased by 12% with the addition of P fertilization. Based on grain yield efficiency index, genotypes were classified into efficient, moderately efficient, and inefficient group. The genotypes that were classified as efficient in P use were BRA032048, BRA042094, BRA02601, BRA032051, BRA032033, BRA052015, BRA042156, BRA01600, BRA01506, BRA052023 and BRA042160. The inefficient genotypes in P us efficiency were BRS Primavera, BRA052045, BRA01596, and BRS Sertaneja. Grain harvest index had a significant positive association with grain yield and spikelet sterility had a significant negative association with grain yield, as expected. Average, P-use efficiency of five genotypes was about 17 kg kg&#8722;1 (kg grain yield per kg P applied).	
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 - (32552-1) - UPC - AP - DD - 2014.007 -  - 2014.007 - DIS
CNPMS - (25692-1) - UPC - AP - DD -  -  -  - DIS