无公害蔬菜基地栽培因子对土壤重金属离子的影响

The Effects of Cultivation Factors on Heavy Metal Content in the Non-environmental Pollution Vegetable Base

对秦王川高新技术园区土壤重金属状况进行了分析研究。结果表明,各种重金属含量依次为Cr>Pb>As>Cd>Hg。肥料种类影响土壤中重金属离子含量,应选择羊粪、牛粪等肥料进行无公害生产;种植的作物种类影响土壤中重金属离子含量,可选择红叶小檗等作物降低土壤中重金属离子含量;栽培环境对土壤中重金属离子含量的影响受其他因素的制约。

The effects of cultivation factors on heavy metal content in the agricultural soil in Qinwang plain irrigation district were analyzed. The results indicated that the distribution of heavy metal in agricultural soil is Cr 〉 Pb 〉 As 〉 Cd 〉 Hg. The status of heavy metals in agricultural soil was affected by different fertilizers and planted crops, which suggested it would be better to select such kinds of fertilizer as sheep dung and cow dung;such kinds of crop, as Berberis thunbergii vat. atropurpurea Chenault as the proceeding crop to decrease the content of heavy metal in the soil. The soil environmental quality of Qinwang plain irrigation district belongs to the first-class; the standard for grading of the soil heavy metal pollution is safety and its pollution level is cleanness.