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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (15): 67-72.doi: 10.11924/j.issn.1000-6850.2011-3095

• 农学 农业基础科学 • 上一篇    下一篇

安徽主要土壤酸碱性及其酸缓冲性能研究

王文婧 戴万宏   

  • 收稿日期:2011-10-24 修回日期:2012-01-05 出版日期:2012-05-25 发布日期:2012-05-25

Study on Soil pH and Acidic Buffering Properties in AnHui Province

  • Received:2011-10-24 Revised:2012-01-05 Online:2012-05-25 Published:2012-05-25

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摘要：

为了解安徽省土壤酸碱性分布状况和影响因素、以及未来酸雨可能给土壤带来的酸化影响，选取采集了安徽省不同地理区域4种主要土壤的0~20 cm表层样品，通过收集资料、室内测定和相关性分析研究了土壤酸碱性和酸缓冲容量的大小、分布规律及其影响因素。结果表明，安徽主要土壤pH值和酸缓冲容量均呈现由北向南依次递减趋势；pH值大小顺序为：潮土>砂姜黑土>水稻土>红壤，土壤酸碱性与年均降水量、交换性铝、交换性酸和水解性总酸度均呈极显著正相关(r2=0.7010~0.9039**)；土壤酸缓冲容量大小顺序为：潮土(87.6 mmol/kg)>砂姜黑土(36.4 mmol/kg)>水稻土(29.2 mmol/kg)>红壤(23.0 mmol/kg)，土壤酸缓冲容量与土壤pH值、土壤阳离子交换量和土壤盐基饱和度均呈极显著正相关(r2=0.7631~0.9494**)；由此可见安徽几种主要土壤的酸碱性存在很大差异，土壤基本性质和环境条件强烈影响着土壤酸碱性和对酸的缓冲性能，由此也必然影响着土壤受酸雨影响的后果。

关键词: 农业一般均衡模型（CGE）, 农业一般均衡模型（CGE）, 粮食安全, 补贴

Abstract:

In order to understand the soil pH distributions and influencing factors and the effects of acid rain on soil acidification, 0-20 cm surface soil samples of four main soil types in different geographical regions in Anhui Province were collected, and the distribution and influencing factors of soil pH and acid buffering capacity were studied through the methods of information collection, indoor chemical analysis and correlation analysis. The results showed that soil pH and buffer capacity of soils in Anhui Province showed a decreasing trend from north to south; the order of soil pH was: alluvial soil> Shajiang black soil> paddy soil> red soil, the relationships between soil pH and average annual precipitation, exchangeable Al, exchangeable acid and the total hydrolysis acidity were showed significant positive correlation (r2=0.7010-0.9039**); the order of soil acid buffering capacity was: alluvial soil (87.6 mmol/kg)> Shajiang black soil (36.4 mmol/kg)>paddy soil (29.2 mmol/kg)> red soil(23.0 mmol/kg), the relationships between soil acid buffering capacity and soil pH, soil basic ion exchange capacity and soil base saturation were significant positive correlation (r2=0.7631-0.9494**). This shows that the soil pH vary considerably in Anhui Province. The soil basic properties and environmental conditions strongly influenced the soil pH and acid buffering properties, which were bound to affect the consequences of soil by acid rain.