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用室内模拟淋洗土柱的方法 ,对棕壤和褐土的酸淋容特征进行了研究。结果表明 ,p H低的酸雨使棕壤严重酸化且有活性铝测出 ,但对褐土的影响相对较轻。 4种盐基离子淋失总量与酸雨的氢离子浓度呈极显著的正相关关系 ,淋失量 Ca2 + >Mg2 + >Na+ >K+ ,其中 Na+对酸雨的酸度最不敏感。电导率的变化与盐基淋失量的变化有相同趋势 ,但不同处理之间的差别倍数大于盐基淋失差别的倍数 ,4种酸雨对土壤的危害程度为 p H2 >p H3>p H4、p H5 ,其中危害棕壤的程度高于褐土。
The method of acid-leaching soil column with indoor simulation was used to study the acid-leaching characteristics of brown soil and cinnamon soil. The results showed that acid rain with low p H made brown soil severely acidified and had active aluminum detected, but the influence on cinnamon soil was relatively light. There was a significant positive correlation between total leaching amount of alkali ions and hydrogen ion concentration in acid rain, and the leaching amount was Ca2 +> Mg2 +> Na +> K +. Na + was the least sensitive to acid rain. The change of conductivity and the change of salt leaching have the same trend, but the difference between different treatments is greater than the difference of leaching base, and the four kinds of acid rain harm the soil as p H2> p H3> p H4 , P H5, which is more harmful to brown soil than cinnamon soil.