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cje ›› 2012, Vol. 31 ›› Issue (11): 2742-2747.

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Effects of plant species and litter on soil organic carbon sequestration in converted croplands in a typical watershed in Three Gorges Reservoir area of China.

TIAN Yao-wu1,2, HUANG Zhi-lin2**, XIAO Wen-fa2   

  1. (1 College of Forestry, Henan University of Science and Technology, Luoyang 471003, Henan, China; 2 State Forestry Administration Key Laboratory of Forest Ecology and Environment, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China)
  • Online:2012-11-10 Published:2012-11-10

Abstract: In order to understand the effects of plant species and litter on the soil organic carbon sequestration and translocation in converted croplands in a typical watershed in Three Georges Reservoir area, a field experiment was conducted. Three treatments including C3 plant (A1) and C4 plant Rhizoma cyperi with litter removal (B0) versus with double litter input (B2) were installed in 2008, and soil and plant samples were collected in 2010, with the organic carbon concentration and δ13C value in soil profiles measured. A changed organic carbon concentration in the soil profiles was observed due to the land use change. After 2 years conversion, the organic carbon concentration in 0-30 cm soil layer in A1 had an increase of 58.4 g C·m-2(1.1%), that in B0 had a distinct increase of 303.3 g C·m-2(4.9%), while that in B2 was decreased by 79 g C·m-2(1.1%). Litter input had significant effects on the soil organic carbon density (P<0.05).

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