Data/hora: 25/05/2024 13:03:10

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	25/10/1994	
Data da última atualização: 	05/10/2021	
Autoria: 	FAGERIA, N. K.; MORAIS, O. P.; BALIGAR, V. C.; WRIGHT, R. J.	
Afiliação: 	NAND KUMAR FAGERIA, CNPAF; ORLANDO PEIXOTO DE MORAIS, CNPAF.	
Título: 	Response of rice cultivars to phosphorus supply on an oxisol.	
Ano de publicação: 	1988	
Fonte/Imprenta: 	Fertilizer Research, v. 16, n. 3, p. 195-206, July 1988.	
DOI: 	https://doi.org/10.1007/BF01051370	
Idioma: 	Inglês	
Conteúdo: 	Genotypic differences in absorption or utilization of P might be exploited to improve efficiency of fertilizer use or to obtain higher productivity on P-deficient soils. The objective of this study was to evaluate responses by 75 genotypes of upland rice (Oryza sativa L.) to two soil P levels in two field experiments. In the first experiment, soil P levels (Mehlich 1) were 1.5 mg kg-1 and 5 mg kg-1, and in the second experiment, 3 mg kg-1 and 4.7 mg kg-1 of soil, respectively. Rice cultivars differed significantly in shoot dry matter production at flowering, grain yield, and plant P status. Based on a grain yield efficiency index, cultivars were classified as P-efficient or P-inefficient. Shoot dry matter was more sensitive to P-deficiency but was not related to grain yield. Phosphorus use efficiency was higher under the low P treatment. Phosphorus uptake was significantly correlated with dry matter, P concentration and P-efficiency ratio. Results of this study indicate that genetic differences in P-use efficiency exist among upland rice cultivars and may be exploited in breeding programs.	
Palavras-Chave: 	Fertilizacao; Genotypic differences.	
Thesagro: 	Arroz; Cerrado; Fósforo; Oryza Sativa; Oxisol; Solo.	
Thesaurus Nal: 	Oxisols; Phosphorus; Rice.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/item/226657/1/fr-1988.pdf	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (6765-1) - UPC - AP - DD - 1988 -  - 1988 - DIS