珠江三角洲潮土和水稻土酸缓冲特性试验研究  

Study on acid buffer characters of fluvo-quic soil and paddy soil in the Pearl River Delta

作　　者：朱霞萍[1] 汪模辉[1] 李锡坤[2] 高科理[1] 

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]广东省物料实验检测中心,广东广州510080

出　　处：《环境污染与防治》2010年第1期47-50,55,共5页Environmental Pollution & Control

基　　金：广东省珠江三角洲经济区农业地质与生态地球化学调查项目子课题"酸雨对珠江三角洲土壤质量影响的模拟试验"(No.1212010511216-04-02-01)

摘　　要：珠江三角洲潮土和水稻土对不同种类的酸具有一定的缓冲性,不同种类的酸对不同类型土壤的酸化趋势不同。大旺水稻土对酸的敏感性强于龙山潮土,龙山潮土属于稍易受害的稍敏感土壤,大旺水稻土属于易受害的敏感土壤;同一土壤对酸的缓冲能力比对碱的缓冲能力强;不同种类的酸对土壤的敏感性不同,土壤对硝酸的敏感性强于对硫酸的敏感性;土壤加酸后酸缓冲曲线和土壤中铝释放曲线的交点可以作为衡量土壤对酸敏感性的指标,交点越低,敏感性越强;加酸后土壤中铝的释放可以用模型y=nx+k来预测。Longshan soil and Dawang soil were selected as typical fluvo-quic soil and paddy soil of Pearl River Delta, and their buffer characters were investigated. The results showed that the sensitivity of the soil to alkali was stronger than to acid, both of Longshan soil and Dawang soil had a certain buffer to acid, but their acid sensitivity was different. Dawang soil was more sensitive to acid than Longshan soil, according to their soil acid-damage capacities, Longshan soil and Dawang soil were classified as slightly vulnerable sensitive soil and vulnerable sensitive soil respectively. Because of different acidification ability of nitric acid and sulfuric acid, the two types of soil were more sensitive to nitric acid than to sulfuric acid. Intersection point of buffer curve and aluminum release curves of soil could serve as an indicator of soil acid sensitivity. The lower of the intersection point, the greater sensitivity of soil would be. The release of aluminum in soil after adding acid could be predicted by the model of y=nx＋k.

关 键 词：土壤 敏感性 铝 酸害容量 

分 类 号：TU982.2[建筑科学—城市规划与设计]