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中国沙漠 ›› 2008, Vol. 28 ›› Issue (4): 690-695.

• 生物土壤与生态 • 上一篇    下一篇

腾格里沙漠南缘沙漠化逆转过程中的土壤物理性质变化特征

徐丽恒1, 王继和2*, 李 毅1, 马全林2, 张德魁2, 刘有军2, 陈 芳2   

  1. 1.甘肃省农业大学林学院, 甘肃 兰州 730000; 2.甘肃省荒漠化防治重点实验室 甘肃省治沙研究所, 甘肃 武威 733000
  • 收稿日期:2007-11-20 修回日期:2007-12-11 出版日期:2008-07-20 发布日期:2008-07-20

Variations of Soil Physical Properties in Desertification Reversion Process at South Edge of Tengger Desert

XU Li-heng1, WANG Ji-he2, LI Yi1, MA Quan-lin2, ZHANG De-kui2, LIU You-jun2, CHEN Fang2
  

  1. 1.College of Forestry, Gansu Agricultural University, Lanzhou 730000, China;2.Gansu Desert Control Research Institute & Gansu Key Laboratory of Desertification Combating, Wuwei 733000, Gansu, China
  • Received:2007-11-20 Revised:2007-12-11 Online:2008-07-20 Published:2008-07-20

摘要:

在腾格里沙漠南缘,应用空间代替时间的方法,选择了流动沙丘、封育5 a、封育15 a和封育25 a的恢复序列,研究了沙漠化逆转过程中的土壤物理性质变化特征。结果表明,腾格里沙漠南缘沙漠化逆转过程中,土壤含水率先降低后增大;土壤沙粒含量逐渐减少,土壤粉粒和粘粒含量逐渐增加;土壤容重逐渐降低,土壤孔隙度逐渐增大,表层土壤容重在封育恢复过程中逐渐减小,表层土壤孔隙度在封育恢复15 a后趋于稳定。研究认为,在腾格里沙漠南缘的沙漠化逆转过程中,沙化土地土壤性状不断提高、土壤结构不断改善;沙漠化逆转过程也是土壤的形成过程。

关键词: 腾格里沙漠南缘, 沙漠化逆转, 封育, 土壤物理性质, 植被恢复

Abstract:

Plots of moving dune, enclosure for 5 years, enclosure for 15 years and enclosure for 25 years at the south edge of the Tengger Desert are chose to study the change of soil physical properties in desertification reversion process by methodology of “Temporal for Spatial”. The results showed that in desertification reversion process the total soil water content reduced first and increased later; soil sand particle content gradually decreased, soil silt and clay particle content gradually increased; soil bulk density and soil porosity gradually decreased, and the surface-soil bulk density of the plots restored for 15 years tended to be stable. It is concluded that the soil properties and soil structure of decertified land was improved, and the formation of soil was promoted in reversion process of desertification in arid areas.

Key words: south edge of the Tengger desert, reversion process of desertification, enclosure, soil physical properties, vegetation restoration

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