天津盐碱荒地农垦过程对土壤环境中微量元素的影响(旱田)

The Influence to Trace Elements Contents in the Soil Environment in Salt-alkaline Wasteland Reclamation and Cultivation Course, Tianjin (glebe)

以天津盐碱荒地农垦过程为例,分析盐碱荒地农垦为旱田后土壤环境中微量元素的变化特征。结果显示,随着垦植年限的增加,土壤表层(0—20cm)中,除Hg有明显的增加外,其他微量元素的含量变化不大;与深层土壤(20—40cm)相比,除Cd、B、Hg等微量元素的含量略高于深层土壤外,其它元素的含量基本一致。表明盐碱荒地农垦为旱田后,Hg、B、Cd是受人类活动干扰最大的元素,农业耕作对土壤的影响相对较少。

Using Tianjin salt-alkaline wasteland reclamation and cultivation course as example, the author analyzes the change feature of trace elements in the soil environment after the salt-alkaline wasteland reclamated and cultivated for the glebe. Along with the increase that the planting fixed number of years, the contents of Cu and Mn in the soil demonstration and B, As and Se increase in some degree, but Hg increases remarkably. The contents of elements in the soil depth of 0—20 cm and 20—40 cm are coincide on the whole. It indicates the influence of agriculture farming to soil is insignificant after the salt alkaline wasteland ground land reclamation and cultivation the glebe.