人工修复措施对严重退化红壤固碳效益的影响

Effects of Human Induced Vegetation Rehabilitation on Carbon Fixation Benefit in Seriously Degraded Red Soil

固碳效益是侵蚀退化地水土保持效益的重要组成部分,其对全面评价生态修复意义重大。从人工促进生态修复林分固碳功能出发,以裸露地为对照,不同人工修复措施林分为研究对象,对其碳储量及固碳价值进行了研究。结果表明,人工修复显著增加了植被碳库和土壤碳库的碳储量,强烈干扰马尾松、竹节沟马尾松、种草竹节沟马尾松和竹节沟湿地松植被碳库分别为6.12,6.83,8.20和32.69t/hm2,其土壤碳库分别为裸露地的1.16,1.37,1.60和2.71倍,固碳总价值分别比裸露地增加了0.36,0.60,0.87和2.78倍。

Carbon fixation benefit is an important part of the soil and water conservation benefits on degraded land and has a great significance in comprehensive evaluation of ecological rehabilitation. Taking bare land as a contrast, different types of human induced vegetation are studied. According to the studies on carbon pool and carbon fixation value of them, there was an obvious increase in vegetation carbon pool and soil pool after human induced rehabilitation. Vegetation carbon pools in strong interfered Pinus rnassoniana, bamboo- burl-groove Pinus massoniana, glassed-bamboo-burl-groove Pinus massoniana, and bamboo-burl-groove Pinuselliotti were 6.12, 6.83, 8.20, and 32.69 t/hm2 ; soil carbon pools of them were 1.16, 1.37, 1.60, and 2.71 times those on bare land; and the total values of carbon fixation were 0.36, 0.60, 0.87, and 2.78 times those on bare land, respectively.