城市功能区、植被类型和利用年限对土壤压实的影响
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金重点项目(40235054)和中国科学院知识创新工程项目(KZCX3-SW-427)资助。


Effects of Function Zone, Vegetation Type and Land Use Age on Soil Compaction in Urban Nanjing
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    土地利用会对土壤压实产生影响。本文通过对南京市不同功能区、植被类型和利用年限的土壤进行调查研究,了解这些利用情况对土壤压实的影响程度。结果表明:城郊菜地土壤没有被压实,而城区土壤存在不同程度的压实退化现象;城区内部只有公园土壤与道路绿化带土壤之间的通气孔隙度指标差异显著,其他功能区土壤之间压实指标差异不显著。所以,就压实状况而言,城区内并不存在所谓的功能区之间的差异。植被类型和利用年限对城市土壤的压实都有显著的影响。蔬菜地土壤与自然土壤体积质量和孔隙度相近,为无压实土壤,城区除了树下灌木土壤无压实外,其他植被类型下的土壤均有不同程度的压实退化现象,草坪和裸地土壤压实最为严重。从利用年限看,利用时间少于5年的新土压实程度远远大于利用时间在20年以上老土的压实程度。土壤压实严重与城市建设时的机械压实和草坪建成后的人为践踏密切相关,利用较久的老土壤压实较轻,主要是在无进一步人为践踏情况下,植被生长后根系和土壤生物活动有一定的修复作用。乔木和灌木搭配的修复效果最好。

    Abstract:

    Land use often affects soil compaction. Soils in urban Nanjing were investigated in order to understand the effects of function zone, vegetation type and land use age on soil compation. Results showed that vegetable garden soil in the suburb wasn't compacted, while soils in the city were comparatively compacted. In the city, there was no significant difference in compaction degree among soils in different function zones except in the index of aeration porosity between soils in park and road greenbelt. Both vegetation type and land use age showed significant effects on compaction degree of urban soils. Suburbs vegetable garden soils were quite close to natural soil in bulk density and porosity, while in the city except those under arbors and shrubs, all soils had been compacted to a varying degrees, especially the soils in lawn and bareland. In terms of effect of land use age, new soils, (5 years since transported), were far more compacted than old soils (over 20 years since transported), because the former got compacted under heavy machines and trampling of people, whereas the latter were loosened a little bit as a result of growth of roots of the vegetation planted, which has increased biological activities and has lessened human trampling. The findings showed that plantation of arbors and shrubs in association is the best way in remedying compacted soils.

    参考文献
    相似文献
    引证文献
引用本文

杨金玲,张甘霖.城市功能区、植被类型和利用年限对土壤压实的影响[J].土壤,2007,39(2):263-269. YANG Jin-ling, ZHANG Gan-lin. Effects of Function Zone, Vegetation Type and Land Use Age on Soil Compaction in Urban Nanjing[J]. Soils,2007,39(2):263-269

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2017-05-19
  • 出版日期: