铜在草甸黑土中的淋溶规律及其对不同因素的响应

Leaching Law of Copper in the Meadow Black Soil and Response to Different Factors

通过室内土柱试验,模拟研究在扣除地表径流影响的条件下,铜在草甸黑土中的淋溶规律。结果表明:随着淋溶液用量增加,铜的淋出量增大;土壤溶液和腐殖酸溶液作为淋溶液,在一定程度上抑制铜的淋溶,而EDTA会显著促进铜的淋溶;CaCl2、MgSO4、KCl和NaCl 4种无机盐淋溶液均能促进铜的淋溶,促进作用顺序为CaCl2>MgSO4>KCl和NaCl>对照;随着淋溶液pH值的降低,铜的淋出量增加;间断淋溶方式不利于土壤中铜的淋溶。

This paper study on the leaching law of copper in meadow black soil under the conditions of deduction the surface runoff,using soil column experiments in lab.The main results were summarized as follows： With the rising amount of leaching solution,eluviated copper quantity increased.Soil solution and humic acids inhibited the copper leaching to some extent,while EDTA would promote the leaching of copper significantly.Four kinds of inorganic salts could promote the leaching of copper,but their promotion intensity were different.The order for promotion was：CaCl2MgSO4KCl and NaClthe control.With the reducing pH of leaching solution,eluviated copper quantity also increased.Discontinuous leaching went against the leaching of copper in soil.