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生态学杂志 ›› 2001, Vol. ›› Issue (2): 16-19.

• 研究报告 • 上一篇    下一篇

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

张旭辉, 李恋卿, 潘根兴   

  1. 南京农业大学资源环境科学学院农业资源与生态环境研究所, 南京210095
  • 收稿日期:1999-10-28 修回日期:2000-02-10 出版日期:2001-04-10
  • 基金资助:
    教育部博士点专项研究基础基金资助(BO9707);江苏省自然科学基金资助项目

Effect of Different Crop Rotation Systems on the Aggregates and Their SOC Accumulation in Paludalfs in North Huai Region,China

Zhang Xuhui, Li Lianqing, Pan Genxing   

  1. College of Resources and Environmental Sciences, and Institute of Resource, Ecosystem and Environment for Agriculture, Nanjing Agricultural University, Nanjing 210095
  • Received:1999-10-28 Revised:2000-02-10 Online:2001-04-10

关键词: 土壤动物, 高山/亚高山森林, 凋落物, 质量损失率

Abstract: Paludalfs under different crop rotation systems in North Huai region,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 of13C 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·a-1 to 0 22C g·kg·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.

Key words: soil fauna, alpine/subalpine forest, litter, mass loss.

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