Data/hora: 15/06/2024 09:46:12

Biblioteca(s): 	Embrapa Agricultura Digital; Embrapa Arroz e Feijão.	
Data corrente: 	15/03/1996	
Data da última atualização: 	18/06/2020	
Autoria: 	FAGERIA, N. K.; CARVALHO, J. R. P.	
Afiliação: 	NAND KUMAR FAGERIA, CNPAF; JOSE RUY PORTO DE CARVALHO, CNPAF.	
Título: 	Influence of aluminum in nutrient solutions on chemical composition in upland rice cultivars.	
Ano de publicação: 	1982	
Fonte/Imprenta: 	Plant and Soil, The Hague, v. 69, n. 1, p. 31-44, Feb. 1982.	
ISSN: 	0032-079X	
DOI: 	10.1007/BF02185701	
Idioma: 	Inglês	
Conteúdo: 	Aluminum toxicity is an important growth limiting factor for upland rice production on oxisols of ?cerrado? region in Brazil. Data related to the effect of Al on uptake of nutrients for rice crop are limited. The effect of five Al concentrations (0, 10, 20, 40 and 60 ppm) in culture solution on the chemical composition of 30 upland rice cultivars was studied. Aluminum concentration and content in plant tissues were increased with higher levels of Al in all cultivar. In the roots Al content was higher as compared with the tops. Critical toxic level of Al in the tops of 21 days old plants varied from 100 to 417 ppm depending on the cultivars. Rice cultivars responded differently to Al treatments with respect to nutrients uptake. Increased Al concentrations in the solution exerted an inhibiting effect on the concentrations and contents of N, P, K, Ca, Mg, S, Na, Zn, Fe, Mn, B and Cu. Thus the inhibition was more effective for macronutrients in the plant tops in following order: Mg>Ca>P>K>N>S>Na. Whereas for micronutrients it was in the order of Mn>Zn>Fe>Cu>B. Morphological, physiological and biochemical effects of Al, toxicity responsible for the reduction in plant nutrient uptake, are discussed.	
Palavras-Chave: 	Aluminum toxicitiy; Arroz de sequeiro; Composição química de arroz; Toxidez de aluminio; Upland rice.	
Thesagro: 	Arroz; Cerrado; Nutriente; Oryza Sativa; Solução Nutritiva.	
Thesaurus Nal: 	aluminum; Chemical composition; rice.	
Categoria do assunto: 	--
F Plantas e Produtos de Origem Vegetal	
Registro original: 	Embrapa Arroz e Feijão (CNPAF)	
Exemplares: 	CNPTIA - (3082-1) - EMB - SP - PP -  -  - 1996.00077 - DES
CNPTIA - (3082-2) - EMB - AP - DD -  -  -  - DIS
CNPAF - (17027-1) - UPC - AP - PP - 1982 -  - 1982 - DIS