安徽主要土壤酸碱性及其酸缓冲性能研究  

Study on Soil pH and Acidic Buffering Properties in Anhui Province

作　　者：王文婧[1] 戴万宏[1] 

机构地区：[1]安徽师范大学环境科学与工程学院,安徽芜湖241000

出　　处：《中国农学通报》2012年第15期67-72,共6页Chinese Agricultural Science Bulletin

基　　金：安徽省教育厅自然科学基金项目"土壤有机质分解及温室气体排放与酸碱度的定量关系研究"(2006kj211B)

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和酸缓冲容量均呈现由北向南依次递减趋势;pH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、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。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 total hydrolysis acidity were showed significant positive correlation （~=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 soi1（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 （X2=0.7631-0.9494）. It showed that the soil pH varied 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.

关 键 词：安徽 土壤 土壤酸碱性 酸缓冲性 缓冲容量 

分 类 号：S153.6[农业科学—土壤学]