Data/hora: 13/06/2024 05:04:26

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