水土保持学报2012，Vol.26Issue(5)：73-77,5.
耕作方式对稻-油轮作系统土壤理化性质及重金属有效性的影响
Effects of Tillage Methods on Physicochemical Properties and Heavy Metal Availability of Soils in Rice-rape Rotation Systems
摘要
Abstract
To explore the effects of tillage methods on soil physicochemical properties and heavy metal availability of soils in rice-rape rotation systems,a long term field experiment,which consists of five treatments and has lasted for 21 years,was conducted.The results showed that compared with the conventional tillage,the contents of organic matter and cation exchange capacity in the ridge and no-tillage treatment with surface upper-accumulated pattern,increased significantly,but the pH decreased significantly.The availability of Cd,Cu,and Zn in soils was highest in the ridge and no-tillage treatment,while the availability of Pb was highest in the conventional tillage treatment.The availability of Cd and Pb decreased with increase of soil depth,but there was no obvious trend for the availability of Cu and Zn in soil.The correlation analysis showed that the organic matter content was best correlated with the availability of Cd and Zn,and was also significantly correlated to the availability of Cu and Pb in soil.There was no significant correlation between cation exchange capacity and the availability of heavy metal.The results obtained in present study implied that the effects of tillage method on the availability of soil heavy metal was caused by the changes of organic matter contents.Compared with the conventional tillage,the ridge and no-tillage had more advantages in improving the physicochemical characters of soils,but increased the availability of Cu,Zn,and Pb in the depth of 0-40 cm.关键词
耕作方式/土壤理化性质/重金属/水稻土Key words
tillage method/soil physical and chemical properties/heavy metal/paddy soil分类
资源环境引用本文复制引用
崔孝强,阮震,刘丹,赵秀兰..耕作方式对稻-油轮作系统土壤理化性质及重金属有效性的影响[J].水土保持学报,2012,26(5):73-77,5.基金项目
西南大学生态学重点学科“211工程”建设项目 （）
西南大学本科生科技创新基金项目 （）
西南大学资源环境学院“光炯”创新基金项目 （）
