不同磷含量对石灰性潮土吸附、解吸有效性锌的影响

The Effects of Phosphate on Adsorption and Desorption of Available Zinc in Calcareous Soil

以不同磷含量的石灰性潮土为材料,通过对锌的吸附、解吸试验,研究了磷对石灰性土壤中锌有效性的影响,结果表明,随着石灰性土壤中磷含量的提高,土壤对锌的吸附量和吸附能力显著降低,而KCl对锌的解吸量却明显增加,从而得出石灰性土壤中施磷促进了土壤中锌的有效性是施磷促进作物对锌吸收的一个原因.

Soils treated with phosphate of different concentrations were used as materials to study the effects of phosphate on Zn behaviors and bioavailabilities in calcareous soil by Zn absorption and desorption experiments. The results showed that high P concentration in calcareous soil decreased the absorption capacity and adsorbability of Zn in soil, and increased desorption of Zn by KCl. i. e. , high level P in calcareous soil could promote the availability of Zn, perhaps this was one of the reasons that application of P in soil could promote the uptaked of Zn by crops in calcareous soil.