云贵鄂渝水土保持世行贷款/欧盟赠款项目区碳储量估测

以云贵鄂渝水土保持世行贷款/欧盟赠款项目实施过程中不同水土保持林、封山育林、经济林及梯田土壤碳储量、地上生物量、地下生物量为研究对象,建立了333个样地并进行了实地调查,根据调查数据,建立了地上部分生物量与地下生物量回归方程,在此基础上,计算出林地碳储量与大气CO2削减量。结果表明,各类植被土壤中碳储量均较低。随着树木年龄的增长,林分同化能力的增强,大气CO2的削减量也会随之增大;项目实施后生态效益明显。

Carbon Sequestration in the Changjiang and Pearl River Watershed Rehabilitation Project Area

As part of measures to reduce and ameliorate soil erosion, the Changjiang Pearl River Water- shed Rehabilitation Project, a number of interventions countribute to carbon sequestration including the afforestation of conservation areas planting of fruit and nut trees, and the protection of existing forested areas. Besides being an effective way to stop soil erosion the trees that are planted also sequester carbon from the atmosphere to build biomass （ i. e. wood） and hence contribute to mitigation of climate change To assess the amounts of carbon that are sequestered in vegetation and soil as a result of project imple- mentation 333 plots were set-up representing different intervention types in Yunnan, Guizhou, Hubei and Chongqing. From these plots information on below-ground biomass, above-ground biomass and soil car- bon were collected. The results show that the amount of carbon sequestrated in the soil in the different in- tervention types was very low. With increasing of tree age, the assimilation capacity of the forest will fur- ther increase, which will further increase the concentration of atmospheric CO2 reduction as well. As a result, this project implementation has produced a significant ecological benefit.