生态学杂志2001，Vol.20Issue(2)：16-19,4.
不同轮作制度对淮北白浆土团聚体及其有机碳的积累与分布的影响
Effect of Different Crop Rotation Systems on the Aggregates and Their SOC Accumulation in Paludalfs in North Huai Region,China
摘要
Abstract
Paludalfs under different crop rotation systems in North Huairegion,China were sampled and soil aggregates were separated by ultra-sonic dispersion followed by sedimentation and centrifuging.The particle size distribution,SOC (Soil organic matter) contents and the natural abundance of 13 C in these aggregates were studied.Significant difference in size of the aggregates and organic carbon storage in the studied soils were found after 5 years of the crop rotation on the soil.SOC was mainly found in 0.02～0.25mm fraction of aggregates in the soils.The aggregates in layers deeper than 35cm became coarse and richer in SOC under corn-peanut-sweet potato rotation.Young carbon derived from corn tended to be accumulated in the coarse fractions as revealed by heavier stable carbon composition in those aggregates from deep layer under the rotation system containing corn crop.Compared to the soil under think pine forest,All soils under crop rotation system showed rapid increase of SOC at rates ranging from 0.14C g*kg-1*a-1 to 0.22C g*kg-1*a-1,with the highest under corn-peanut-sweet potato system.Thus,the significance was indicated for increasing SOC storage by crop rotation in paludalfs and for reinforcing terrestrial carbon retention of atmospheric CO2.关键词
carbon sequestration/cropping system/paludalfs/SOC/soilaggregatesKey words
carbon sequestration/cropping system/paludalfs/SOC/soilaggregates分类
农业科技引用本文复制引用
张旭辉,李恋卿,潘根兴..不同轮作制度对淮北白浆土团聚体及其有机碳的积累与分布的影响[J].生态学杂志,2001,20(2):16-19,4.基金项目
教育部博士点专项研究基础(BO9707)、江苏省自然科学基金资助项目. （BO9707）
