Effects of leaching with simulated acid rain and low molecular weight organic acids on exchangeable bases of red soil were investigated using undistributed soil columns.

采用原状土柱进行模拟淋溶实验，比较研究了模拟酸雨和几种低分子量有机酸对红壤交换性盐基的影响。

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The soil became acid obviously, the exchangeable al in soil increased significantly, crop grew poorly and the yield decreased after applying sole chemical fertilizer for long term.

红壤长期施用单一化学肥料，土壤明显酸化，土壤交换性氢铝显著增加，作物生长变差，产量降低。

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The pH of soil is indirect effects of soil selenium content by regulating the water soluble selenium in the soil, exchangeable and acid soluble content of the percentage.

土壤PH值主要通过调节土壤中硒的水溶态、交换态和酸溶态含量百分比，间接影响土壤中硒的含量。

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