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通过室内模拟方法研究了重金属(Zn、Cd)污染对土壤中速效磷的影响。结果表明:在短时间内,低浓度Zn使速效磷含量升高,高浓度Zn使速效磷含量降低,但随时间增长低浓度Zn便使速效磷含量降低,且有随Zn浓度增加速效磷含量降低的趋势;在短时间内,Cd使速效磷含量升高,但随时间增长则转变为Cd使速效磷含量降低;Zn、Cd复合污染也使速效磷含量降低,且影响强于Zn、Cd单一污染;施肥可以缓解Zn、Cd单一及复合污染对速效磷的影响。
The effect of heavy metal (Zn, Cd) pollution on available phosphorus in soil was studied by indoor simulation method. The results showed that in a short period of time Zn at low concentration increased the content of available phosphorus and Zn at high concentration decreased the content of available phosphorus, but the content of available phosphorus decreased with the increase of Zn concentration. Cd decreased the content of available P, but decreased with the increase of Cd, the content of available P was decreased. The combined effect of Zn and Cd also decreased the content of available P, and the effect was stronger than that of Zn and Cd Single pollution; Fertilization can alleviate the single and compound pollution of Zn, Cd on available phosphorus.