Data/hora: 21/06/2024 02:01:16

Biblioteca(s): | Embrapa Arroz e Feijão; Embrapa Milho e Sorgo.
Data corrente: | 06/01/2014
Data da última atualização: | 26/05/2014
Autoria: | FAGERIA, N. K.; CARVALHO, M. C. S.; SANTOS, F. C.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; MARIA DA CONCEICAO SANTANA CARVALHO, CNPAF; FLAVIA CRISTINA DOS SANTOS, CNPMS.
Título: | Root growth of upland rice genotypes as influenced by nitrogen fertilization.
Ano de publicação: | 2014
Fonte/Imprenta: | Journal of Plant Nutrition, New York, v. 37, n. 1, p. 95-106, Jan. 2014.
DOI: | 10.1080/01904167.2013.849731
Idioma: | Inglês
Conteúdo: | The plant root system is an important organ which supplies water and nutrients to growing plants. Information is limited on influence of nitrogen fertilization on upland rice root growth. A greenhouse experiment was conducted to evaluate influence of nitrogen (N) fertilization on growth of root system of 20 upland rice genotypes. The N rate used was 0 mg kg?1 (low) and 300 mg kg?1(high) of soil. Nitrogen X genotype interactions for root length and root dry weight were highly significant (P<0.01), indicating that differences among genotypes were not consistent at two N rates. Overall, greater root length, root dry weight and tops-roots ration were obtained at an N fertilization rate of 300 mg kg?1 compared with the 0 mg N kg?1 soil. However, genotypes differ significantly in root length, root dry weight and top-root ratio. Nitrogen fertilization produced fine roots and more root hairs compared with absence of N fertilizer treatment. Based on root dry weight efficiency index (RDWEI) for N use efficiency, 70% genotypes were classified as efficient, 15% were classified as moderately efficient and 15% were classified as inefficient. Root dry weight efficiency index trait can be incorporated in upland rice for improving water and nutrient efficiency in favor of higher yields.
Thesagro: | Adubação; Arroz; Genótipo; Latossolo; Nitrogênio; Oryza sativa; Raiz; Solo.
Thesaurus Nal: | Genotype; Nitrogen fertilizers; Oxisols; Rice; Roots.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Arroz e Feijão (CNPAF)

Exemplares:

CNPMS - (25541-1) - UPC - AP - DD -  -  -  - DIS
CNPAF - (32421-1) - UPC - AP - DD - 2014.011 -  - 2014.011 - DIS