| 模拟酸雨对南方土壤硅铝释放的影响 |
| 摘要点击 1926 全文点击 1952 投稿时间：1999-04-20 |
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| 中文关键词 酸雨 硅 铝 淋溶 释放 土壤 模拟实验 |
| 英文关键词 acid deposition,Si2+ and Al3+,leaching,releasing. |
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| 中文摘要 |
| 通过模拟酸雨淋溶实验，分析了淋溶液pH值和硅铝离子释放规律和特点的关系．结果表明，模拟酸雨的酸度是决定土壤中硅铝淋溶释放量的主要因素．当pH＞3.0时释放量增幅较为缓慢，而pH＜3.0以后释放量骤增．土壤溶液中H+浓度的增加，使得以水解反应为主要过程的土壤矿物的风化作用加强，从而使硅铝释放量增大. |
| 英文摘要 |
| This paper dealt with the relationship of pH value and the characteristics of Si2+ and Al3+ of leaching solutions under the treatment of simulated acid rain in main soil types collected from South China. The results showed that amounts of Si2+ and Al3+ releasing were decided mainly by pH value of simulated acid rain.When pH was lower than 3.0,the amounts of releasing increased sharply.Otherwise,the amounts of Si2+ and Al3+ released from soils increased slowly.As the addition of H+ concentration in soil solution,the amounts of released Si2+ and Al3+ increased with the acceleration of the hydrolysis reaction of soil minerals,which usually were the most important soil weathering process.
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