近30年来广东省土壤pH值的时空变化  

Spatiotemporal variation of soil pH in Guangdong Province of China in past 30 years

作　　者：郭治兴[1] 王静 柴敏[1] 陈泽鹏 詹振寿[1] 郑武平 魏秀国 

机构地区：[1]广东省生态环境与土壤研究所,广州510650 [2]广东省科学技术职业学校,广州510650 [3]广东省烟草公司,广州510610 [4]广东烟草梅州市有限公司,广东梅州514011 [5]广东省商学院,广州510320

出　　处：《应用生态学报》2011年第2期425-430,共6页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金资助项目(40601092);广东省科技计划项目(2008A060204003);广东省关键领域重点突破项目(2007A020905001);广东省烟草专卖局2009年科技开发项目资助

摘　　要：基于广东省第二次土壤普查(20世纪80年代)以及2002—2007年广东省土壤pH数据,对期间土壤pH的时空变化进行了研究.结果表明:研究期间,广东省土壤pH空间分布格局基本一致;除珠江三角洲和清远、韶关部分地区土壤为弱碱性外,其他地区土壤以酸性为主;土壤pH变化整体表现为酸化,土壤pH平均值由5.70降至5.44.除潮土pH变化以增大为主外,其他土壤类型的pH均呈降低趋势,以赤红壤、水稻土和红壤pH的降幅尤为严重,石灰土pH值的降低趋势和降低面积比例均最明显.广东省土壤酸化主要受土壤本身特性和酸雨等自然因素以及不合理施肥和城市化等人为因素的影响;另外,由于工业化和矿山开发,还导致局部地区土壤pH值有所上升.Based on the 1980s＇ soil inventory data and the 2002-2007 soil pH data of Guangdong Province,the spatiotemporal variation of soil pH in the Province in past 30 years was studied.In the study period,the spatial distribution pattern of soil pH in the Province had less change（mainly acidic）,except that in Pearl River Delta and parts of Qingyuan and Shaoguan（weak alkaline）.The overall variation of soil pH was represented as acidification,with the average pH value changed from 5.70 to 5.44.Among the soil types in the Province,alluvial soil had an increased pH,lateritic red soil,paddy soil,and red soil had a large decrement of pH value,and lime soil was most obvious in the decrease of pH value and its area percentage.The soil acidification was mainly induced by soil characteristics,some natural factors such as acid rain,and human factors such as unreasonable fertilization and urbanization.In addition,industrialization and mining increased the soil pH in some areas.

关 键 词：土壤PH 时空变化 广东省 

分 类 号：S153[农业科学—土壤学]