Data/hora: 18/06/2024 18:15:20

Biblioteca(s): 	Embrapa Arroz e Feijão.	
Data corrente: 	27/08/2008	
Data da última atualização: 	02/06/2022	
Autoria: 	FAGERIA, N. K.; BARBOSA FILHO, M. P.; SANTOS, A. B.	
Afiliação: 	NAND KUMAR FAGERIA, CNPAF; MOREL PEREIRA BARBOSA FILHO, CNPAF; ALBERTO BAETA DOS SANTOS, CNPAF.	
Título: 	Growth and zinc uptake and use efficiency in food crops.	
Ano de publicação: 	2008	
Fonte/Imprenta: 	Communications in Soil Science and Plant Analysis, v. 39, n. 15/16, p. 2258-2269, Sept. 2008.	
DOI: 	https://doi.org/10.1080/00103620802289141	
Idioma: 	Inglês	
Conteúdo: 	Zinc (Zn) deficiency in annual crops is very common in Brazilian Oxisols. Data are limited on Zn uptake and use efficiency during crop growth cycles. A field experiment was conducted during two consecutive years with the objective to determine shoot dry weight and Zn uptake and use efficiency in upland rice, dry bean, corn, and soybean during growth cycles. Shoot dry weight of four crops was significantly increased in an exponential quadratic fashion with increasing plant age. Rice and corn had higher shoot dry weights and grain yields than dry bean and soybean. Zinc concentration in rice and corn decreased in a quadratic fashion with increasing plant age. However, in dry bean and soybean, Zn concentration had a quadratic increase. Zinc uptake followed an exponential quadratic response in four crops, and it was higher in corn and upland rice than in dry bean and soybean. Zinc use efficiency in shoot dry-weight production had significant quadratic responses in upland rice and soybean with increasing plant age. In corn, Zn use efficiency for shoot dry-weight production was linear as a function of plant age. Zinc use efficiency for grain production was maximum for corn and minimum for soybean. Hence, cereals had higher Zn use efficiency than legumes. Zinc concentration in grain of dry bean and soybean was higher than in upland rice and corn, which is a desirable quality factor for human consumption so as to avoid Zn deficiency.	
Palavras-Chave: 	Brazilian oxisols; Soils.	
Thesagro: 	Arroz; Feijão; Glycine Max; Milho; Oryza Sativa; Phaseolus Vulgaris; Soja; Solo; Zea Mays; Zinco.	
Thesaurus Nal: 	rice; zinc.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPAF - (27345-1) - UPC - AP - DD - 2008 -  - 2008 - DIS