Interferência do hipoclorito de sódio na absorção de macro e micronutrientes nas culturas da soja e do feijão
Alternative titleSodium hypochlorite interference in the uptake of macronutrients and micronutrients in the soybean and bean crops
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The objective of this work was to evaluate the effect of the sodium hypochlorite application in different levels in the fresh and dry biomass and in the uptake of macronutrients and micronutrients in plants of soybean and bean. The experiments were carried at the greenhouse of the Departamento de Recursos Naturais/Ciência do Solo, FCA/UNESP, Botucatu/SP, in columns of rigid PVC with capacity to 1.0 liter of soil. The experimental design used in each experiment was entirely randomized, with 4 replications. The treatments in each experiment were constituted of 5 doses of sodium hypochlorite (0.0, 0.5, 1.0, 2.0 and 4.0 L ha-1). The following parameters were evaluated: fresh and dry biomass, macro and micronutrients contents in the plants leaves. The levels of sodium hypochlorite did not reflect significantly on the fresh and dry biomass of soybean and bean. The soybean dry biomass presented significant difference among the level of sodium hypochlorite. Average contents of macro and micronutrients obtained in bean leaves were not affected by the levels of sodium hypochlorite. The sulphur contents in soybean leaves presented significant difference. The sodium hypochlorite did not affect negatively the macro and micronutrients contents in leaves of soybean and bean.
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