Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/43061
Título: Interação fosfito e fosfato no crescimento e na nutrição fosfatada do feijoeiro em solução nutritiva
Título(s) alternativo(s): Effect of phosphite-phosphate interaction on growth and on phosphorus nutrition of common bean in nutrient solution
Palavras-chave: Fosfatase ácida
Nutrição fosfatada
Frações de fósforo
Fosfito de potássio
Acid phosphatase
Phosphate nutrition
Phosphorus fractions
Potassium phosphite
Data do documento: Abr-2013
Editor: Sociedade Brasileira de Ciência do Solo (SBCS)
Citação: ARAÚJO, J. L. et al. Interação fosfito e fosfato no crescimento e na nutrição fosfatada do feijoeiro em solução nutritiva. Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 37, n. 2, p. 482-490, mar./abr 2013. DOI: 10.1590/S0100-06832013000200019.
Resumo: The use of phosphite as a fungicide or supplementary source of phosphorus (P) has been intensified in recent years, however, little is known about its effects on important crops such as common bean. This work aimed to evaluate the effect of phosphite on growth and phosphate nutrition of bean plants. Two experiments in an completely randomized design were conducted in nutrient solution in a green house, from January to March 2008. In the first experiment, the treatments consisted of a 5 x 2 factorial design, with five P concentrations in the nutrient solution (0.5; 10; 20; 30 and 60 mg L-1) and two P forms: phosphite (Phi) and phosphate (Pi), with four replications. In the second experiment, the treatments consisted of five proportions of Pi: Phi in nutrient solution (100:0, 25:75, 50:50, 75:25 e 100:0), with five replications. The results showed that the shoot and root dry matter of plants grown with phosphite as the only form of P or with high proportions of Phi in relation to Pi, was drastically reduced, resulting in low P accumulation in these tissues. In conclusion, phosphate cannot be replaced by phosphite in phosphate nutrition of common bean, and has no effect on common bean under adequate phosphate supply. At no or low phosphate supply, severe phosphite toxicity symptoms were observed in the common bean plants, which are very sensitive to this anion.
URI: http://repositorio.ufla.br/jspui/handle/1/43061
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