摘要
Through comparing the concentration and inventory of soil organic carbon (SOC) and its distribution in the soil profiles under several reafforestation patterns, this paper studied the effect of different reafforestation patterns on SOC in the 0～60 cm soil layer located in Lanlingxi drainage area of Zigui county, the three gorges reservoir area. The results showed: In five years after the beginning of the project of Grain for Green, the concentration and inventory of SOC in the 0～30 cm soil layer under most reafforestation patterns were higher than those under contrast 2 (cropland) conditions, while the concentration and inventory of SOC in the 0～60 cm soil layer did not change or even decreased in some cases. The concentration and inventory of SOC and the decreasing magnitude of SOC with the soil profile depth under all the studied reafforestation patterns were lower than those under contrast 1 (shrubbery land) conditions, which received the least impact of land use change. It is thus suggested that the impact of the five-years reafforestation patterns on the SOC in the 0～60 cm soil layer is insignificant. In contrast, the impact of the land use change could be one of the controlling factors affecting SOC in the three gorges reservoir area.
Through comparing the concentration and inventory of soil organic carbon （SOC） and its distribution in the soil profiles under several reafforestation patterns, this paper studied the effect of different reafforestation patterns on SOC in the 0 - 60 cm soil layer located in Lanlingxi drainage area of Zigui county, the three gorges reservoir area. The results showed： In five years after the beginning of the project of Grain for Green, the concentration and inventory of SOC in the 0 - 30 cm soil layer under most reafforestation patterns were higher than those under contrast 2 （cropland） conditions, while the concentration and inventory of SOC in the 0 - 60 cm soil layer did not change or even decreased in some cases. The concentration and inventory of SOC and the decreasing magnitude of SOC with the soil profile depth under all the studied reafforestation patterns were lower than those under contrast 1 （shrubbery land） conditions, which received the least impact of land use change. It is thus suggested that the impact of the five-years reafforestation patterns on the SOC in the 0 - 60 cm soil layer is insignificant. In contrast, the impact of the land use change could be one of the controlling factors affecting SOC in the three gorges reservoir area.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2007年第4期111-114,共4页
Scientia Silvae Sinicae
基金
国家林业局退耕还林科技支撑项目:"三峡库区小流域防护林体系建设综合示范"和湖北省林业局生态监测专项"湖北省退耕还林生态效益监测"项目资助
关键词
土壤有机碳
退耕还林模式
三峡库区
soil organic carbon
reafforestation patterns
the three gorges reservoir area
