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Effect of rates of calcium hydroxide and zinc sulfate on soluble zinc concentration of spray solution and absorption of zinc 65 by sweet orange citrus sinensis leaves



Effect of rates of calcium hydroxide and zinc sulfate on soluble zinc concentration of spray solution and absorption of zinc 65 by sweet orange citrus sinensis leaves



Scientia Horticulturae 18(3): 263-268



In a laboratory experiment, addition of increasing rates of Ca(OH)2 to ZnSO4 spray solution caused a decrease in soluble Zn concentration and an increase in its pH. The soluble Zn concentration in 0.15% neutralized ZnSO4 solution was 7 times higher than in the 0.60% neutralized ZnSO4 solution. The spray solutions containing 0.15 and 0.45% of 65ZnSO4 in combination with 0.0, 0.0375, 0.0750, 0.1125 and 0.225% of Ca(OH)2 were applied to sweet orange (C. sinensis Osbeck) leaves. The increasing rates of Ca(OH)2 in the ZnSO4 spray solution decreased 65Zn absorption by the leaves and this effect decreased with increasing rates of 65ZnSO4 in the solution. This resulted from the decrease in Zn concentration in the spray solution. Thus addition or presence of any ion in the solution that forms a precipitate with Zn would cause a decrease in the efficiency of the spray solution as a result of a lower amount of Zn available from solution per unit area of the leaf.

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Accession: 005266122

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Effect of rates of Ca(OH)2 calcium hydroxide and ZnSO4 zinc sulfate on soluble zinc concentration of spray solution and absorption of 65Zn zinc isotopes by sweet-orange leaves Citrus sinensis. p. 1983

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