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Volume 30 Issue 1
Mar.  2011
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Article Navigation >  CARSOLOGICA SINICA  > 2011  >  30(1): 59-65
LIU Fang, WANG Shi-jie, LIU Xiu-ming, PU Tong-da, CNEN Zu-yong. Changes of organic C, N and P in rhizosphere soil under various dominant tree species in karst rocky desertification area[J]. CARSOLOGICA SINICA, 2011, 30(1): 59-65. doi: 10.3969/j.issn.1001-4810.2011.01.010
Citation: LIU Fang, WANG Shi-jie, LIU Xiu-ming, PU Tong-da, CNEN Zu-yong. Changes of organic C, N and P in rhizosphere soil under various dominant tree species in karst rocky desertification area[J]. CARSOLOGICA SINICA, 2011, 30(1): 59-65. doi: 10.3969/j.issn.1001-4810.2011.01.010
shu

Changes of organic C, N and P in rhizosphere soil under various dominant tree species in karst rocky desertification area

doi: 10.3969/j.issn.1001-4810.2011.01.010
  • 1.

    Instituteof Environment and Resources,Guizhou University

  • 2.

    State Key Laboratory of Environment Geochemist, Institute of Geochemistry, Chinese Academy of Science

  • Received Date: 2010-11-10
  • Publish Date: 2011-03-25
    Abstract
  • The changes of organic carbon, nitrogen and phosphorus in rhizosphere soil under different dominant tree species in the process of forest degradation are estimated by investigating various vegetations and soils in karst rocky desertification region in Guizhou Province. The results show that the contents of organic C, N and P in rhizosphere soil are significantly higher than that in the bulk of soil. There is obvious difference in the enrichment ratio of organic C, N and P under different vegetation covers in rhizosphere soil. Among them, organic C has the strongest enrichment effect, P the second and N third.In0～30cm scope of the tree rhizosphere soil, the concentrations of total organic C, easily oxidizable C, total N, available N, total P and available P are higher than thatin30～90cm.The difference of total amount is total organic C＞total N＞total P in rhizosphere soils while the difference of available amount is available P＞easily oxidizable C＞available N. During the process of forest degradation, the concentrations of total organic C, easily oxidizable C and available P in rhizosphere soil under different dominant tree species have decreased obviously so affected significantly the soil fertility.

     

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