Data/hora: 05/06/2024 02:11:00

Biblioteca(s): | Embrapa Arroz e Feijão.
Data corrente: | 28/04/2004
Data da última atualização: | 29/04/2022
Autoria: | FAGERIA, N. K.; SANTOS, A. B.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; ALBERTO BAETA DOS SANTOS, CNPAF.
Título: | Lowland rice genotypes evaluation for phosphorus use efficiency.
Ano de publicação: | 2002
Fonte/Imprenta: | Journal of Plant Nutrition, v. 25, n. 12, p. 2793-2802, 2002.
DOI: | 10.1081/PLN-120015539
Idioma: | Inglês
Conteúdo: | Phosphorus (P) deficiency is the most yield-limiting factor in lowland rice production in Inceptisols of Brazil. A greenhouse experiment was conducted to evaluate 12 genotypes of lowland rice (Oryza sativa L.) using an Inceptisol (Typic Haplaquepts). The P treatments were: low (0?mg?P?kg?1), medium (100?mg?P?kg?1), and high (400?mg?P?kg?1). Significant (P<0.01) genotypes differences in P-use efficiency were found. On the basis of P-use efficiency, genotypes were classified as efficient and responsive, efficient and non-responsive, non-efficient and responsive, and non-efficient and non-responsive. From a practical point of view, efficient and responsive and efficient and non-responsive genotypes are the most desirable ones. Among the 12 genotypes tested, none were found to be efficient and responsive and genotypes CNA7553, CNA7591, CNA7601, and Aliança were found to be efficient and non-responsive. Among the yield components, panicle length and harvest index were significantly affected by P levels and genotypes and P and genotypes interactions were significant for these two parameters. However, panicle number was significantly influenced only by P treatment. Among the yield components, panicle number, harvest index, and panicle length were significantly (P<0.01) related to grain yield.
Thesagro: | Arroz; Cerrado; Fósforo; Oryza sativa; Solo.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (21306-1) - UPC - AP - DD - 2002 -  - 2002 - DIS