Data/hora: 27/09/2024 07:41:27

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	26/11/2015	
Data da última atualização: 	26/11/2015	
Autoria: 	FAGERIA, N. K.; MOREIRA, A.	
Afiliação: 	NAND KUMAR FAGERIA, CNPAF; ADONIS MOREIRA, CNPSO.	
Título: 	Zinc-use efficiency in upland rice genotypes.	
Ano de publicação: 	2015	
Fonte/Imprenta: 	Communications in Soil Science and Plant Analysis, New York, v. 46, n. 1, p. 94-108, 2015.	
Idioma: 	Inglês	
Conteúdo: 	Zinc (Zn) deficiency is very common in annual crops grown on Brazilian Oxisols. A greenhouse experiment was conducted to evaluate Zn-use efficiency of 20 upland rice genotypes. The Zn levels used were 0 mg kg-1 (natural level of the soil) and 20 mg kg-1 of soil applied with zinc sulfate (ZnSO4). Zinc × genotype interactions were significant for grain yield, panicle number, panicle length, root dry weight, and specific root length, indicating different responses of genotypes with the variation of Zn levels and that selection for Zn-use efficiency is necessary at low as well as at high Zn rates. Based on Zn-use efficiency index, 11 genotypes were classified as efficient and nine were classified as moderately efficient. The most Zn-efficient genotypes were BRA 01596, BRA 042156, BRA 052053, BRA Primavera, and BRA 01506. The most inefficient genotypes in Zn-use efficiency were BRA 042094, BRA 052045, BRA 052034, and BRA 052023. Grain yield and most of the yield attributing characteristics have significant Zn × genotype interactions, which indicate that genotypes respond differently under different Zn levels. Thus, genotype selection is an important strategy for upland rice production in Brazilian Oxisol	
Thesagro: 	Arroz; Genótipo; Microelemento; Oryza sativa; Raíz; Zinco.	
Thesaurus Nal: 	Grain yield; Rice; Roots; Zinc.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (33771-1) - UPC - AP - DD - 2015 -  - 2015 - DIS