Data/hora: 09/06/2024 18:47:20

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