水土保持研究2017，Vol.24Issue(6)：194-199,204,7.
植被恢复对重金属污染土壤有机质及团聚体特征的影响
Effects of Vegetation Restoration on Soil Organic Matter and Aggregate Characteristics of Heavy Metal Contaminated Soils
摘要
Abstract
In order to study the influence of vegetation restoration on soil organic carbon and soil aggregate structure and stability,a 3-year in-situ experiment was conduct.In a Cu and Cd contaminated farmland,12 plots were built,after applying the passivation materials(except the CK treatment),three kinds of plants (Elsholtzia splendens,Sedum plumbizincicola and Pennisetum sinese) were planted,three years later,the soils were collected to analyze the content of soil organic matter and aggregate composition,and then the content of ＞0.25 mm mechanical-stable (DR0.25) and water-stable (WR0.25) aggregates,aggregate mean mass diameter,geometric mean diameter,aggregate stability rate and fractal dimension (D) were analyzed too.The results showed that after the 3-year vegetation restoration,all of the 3 vegetation treatments increased soil organic matter content,and improved the contents of ＞0.25 mm mechanical-stable(DR0.25) and waterstable (WR0.25) aggregates,increased by 2.89％～5.39％,6.64~10.40％ and 13.34％～17.48％,respectively.The three kinds of plant treatments could significantly improve aggregate mean mass diameter and geometric mean diameter,the largest increase was the treatment of Pennisetum sinese.In aggregate stability,3 kinds of plant treatments could improve the aggregate stability rate,the treatment of Elsholtzia splendens with the largest increase.The vegetation restoration could significantly reduce the soil mechanical stable aggregate fractal dimension,but have no obvious influence on the water-stable aggregates fractal dimension.In summary,the content of organic matter and soil aggregate stability can be improved by adding passivation materials and in-situ phytoremediation,in this way the soil structure can be improved,the soil quality will be restored in the process.关键词
土壤/重金属污染/植被恢复/有机质/团聚体稳定性Key words
soil/heavy metal pollution/vegetation restoration/organic matter/aggregate stability分类
农业科技引用本文复制引用
徐磊,周俊,张文辉,崔红标,刘海龙,刘创慧,梁家妮,周静..植被恢复对重金属污染土壤有机质及团聚体特征的影响[J].水土保持研究,2017,24(6):194-199,204,7.基金项目
国家“973计划”课题(2013CB934302) （2013CB934302）
国家科技支撑计划课题(2015BAD05B01) （2015BAD05B01）
国家自然科学基金(41571461) （41571461）
国家自然科学基金重点项目(41601340)资助 （41601340）
