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Evolution of Litterfall Accumulation and the Characteristics of Its Carbon Pool in the Process of Natural Restoration of Karst Forest Vegetation

  • 1.

    Forestry College of Guizhou University, Guiyang 550025, Guizhou, China

  • 2.

    Civil Engineering and Architecture College of Guizhou University, Guiyang 550025, Guizhou, China

  • Received Date: 2012-04-15
  • Using the method of taking space instead of time, the evolution of litterfall accumulation and the characteristics of its carbon pool in the process of natural restoration of karst forest vegetation was studied in the Maolan National Nature Reserve of Guizhou. The results are as follows:the litterfall accumulation reduced in the process of natural restoration, and the changes of litterfall accumulation decreased quickly in the early stages, but slowly in the middle and late stages. The litterfall accumulation was affected deeply by geomorphologic factors, life cycle of community and soil microorganism in the process of natural restoration. By contrast, the water and heat conditions had little influence to the litterfall accumulation. The litter accumulation had a strong negative correlation with the lost weight rate and the soil surface microbial biomass carbon. There was a strong positive correlation between the lost weight rate and the soil surface microbial biomass carbon. The litter accumulation carbon content rate had no difference among all stages. The litterfall accumulation carbon density followed the same evolution law with the litterfall accumulation as the positive succession developed. The litterfall accumulation played a role as a sink of atmospheric carbon dioxide along the natural restoration, and the characters of litterfall accumulation carbon pool varied from strong carbon source effect and instable carbon sequestration capacity in the early stage to little carbon source effect and stable carbon sequestration capacity in the middle and late stages. The relation equation between the litterfall carbon density (Y) and the exist litterfall accumulation (x) are:Y=bo+b1x(bo and b1 are constant). It plays an important role in observing litterfall carbon density in the research region. So it is necessary to enhance the protection of karst forest vegetation, which would be beneficial for the forest succession, create good condition for litterfall accumulation organic carbon being turned into soil organic carbon, and enhance the stability of forest ecosystems.
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Evolution of Litterfall Accumulation and the Characteristics of Its Carbon Pool in the Process of Natural Restoration of Karst Forest Vegetation

  • 1. Forestry College of Guizhou University, Guiyang 550025, Guizhou, China
  • 2. Civil Engineering and Architecture College of Guizhou University, Guiyang 550025, Guizhou, China
  • Received Date: 2012-04-15

Abstract: Using the method of taking space instead of time, the evolution of litterfall accumulation and the characteristics of its carbon pool in the process of natural restoration of karst forest vegetation was studied in the Maolan National Nature Reserve of Guizhou. The results are as follows:the litterfall accumulation reduced in the process of natural restoration, and the changes of litterfall accumulation decreased quickly in the early stages, but slowly in the middle and late stages. The litterfall accumulation was affected deeply by geomorphologic factors, life cycle of community and soil microorganism in the process of natural restoration. By contrast, the water and heat conditions had little influence to the litterfall accumulation. The litter accumulation had a strong negative correlation with the lost weight rate and the soil surface microbial biomass carbon. There was a strong positive correlation between the lost weight rate and the soil surface microbial biomass carbon. The litter accumulation carbon content rate had no difference among all stages. The litterfall accumulation carbon density followed the same evolution law with the litterfall accumulation as the positive succession developed. The litterfall accumulation played a role as a sink of atmospheric carbon dioxide along the natural restoration, and the characters of litterfall accumulation carbon pool varied from strong carbon source effect and instable carbon sequestration capacity in the early stage to little carbon source effect and stable carbon sequestration capacity in the middle and late stages. The relation equation between the litterfall carbon density (Y) and the exist litterfall accumulation (x) are:Y=bo+b1x(bo and b1 are constant). It plays an important role in observing litterfall carbon density in the research region. So it is necessary to enhance the protection of karst forest vegetation, which would be beneficial for the forest succession, create good condition for litterfall accumulation organic carbon being turned into soil organic carbon, and enhance the stability of forest ecosystems.

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