不同管理措施下内蒙古草地碳汇潜势分析

Carbon Sink Potential of Grassland in Inner Mongolia under Various Management Measures

内蒙古草地退化严重,沙漠化及盐碱化的草地面积逐年扩大,造成碳库大量流失.近年来,通过不同的管理措施,退化草地逐步恢复,进一步增加草地碳库,提高了草地碳汇的经济价值.首先分析了内蒙古地区草地退化的情况,并评估退化草地所具有的碳固持潜力及碳汇价值.其次,选取四子王旗、毛登牧场以及鄂托克前旗等地区具有代表性的各类型草原进行了碳固持潜力的案例分析,评估了不同草地管理措施对碳汇价值的影响,针对现场考察的结果提出相关的建议.

Grassland is one important terrestrial ecosystem to play an essential role in global carbon cycle. With vast grassland, Inner Mongolia is one animal husbandry base in China. Due to natural disasters （climate change, diseases, pests, and rodents） and irrational human activities （unlimited grassland cultivation and over grazing） ,degradation, desertification and salinization have become the most critical issues for grassland ecological protection, as well as sharp decreasing of grassland carbon pool. However, through effective and efficient management measures, the situations of degradation, desertification and salinization of grassland can be alleviated significantly, grassland ecosystem can be improved greatly, degraded grassland can be restored, grassland carbon pool can be reinstated and economic values of grassland sink can be promoted intensely. In this study,first,the situation of grassland degradation in Inner Mongolia was analyzed and carbon sink potential of degraded grass- land was evaluated. Second, in order to choose the most suitable grassland management measure for different types of grassland, three representative sites, Siziwang Banner （desert steppe）, Maodeng Pasture Farm （typical steppe） and Etuokeqian Banner （degraded grassland restoration）were selected to assess the effectiveness and efficiency of various grassland management measures. Finally, some suggestions were proposed according to the results of field survey.