内蒙古天然与放牧草原温室气体排放研究  

Greenhouse gases emission or uptake in Inner Mongolia natural and free-grazing grasslands.

作　　者：王跃思[1] 薛敏[1] 黄耀[1] 刘广仁[1] 王明星[1] 纪宝明[2] 

机构地区：[1]中国科学院大气物理研究所LAPC,北京100029 [2]中国科学院植物研究所,北京100093

出　　处：《应用生态学报》2003年第3期372-376,共5页Chinese Journal of Applied Ecology

基　　金：中国科学院知识创新工程重大资助项目 (KZCX1 SW 0 1)

摘　　要：采用静态箱 气相色谱法测定内蒙古典型草原温室气体排放 .结果表明 ,四类天然草原吸收CH4、排放N2 O和CO2 各自有其相对固定的季节变化形式 ,四类草原和大气交换温室气体通量的变化形式基本一致 ,受年度气候季节变化所控制 ,而土壤、植被类型、降雨量等天然因素和放牧强度等人为因素仅影响排放强度 .与天然羊草草原相比 ,自由放牧降低了羊草草原对CH4的吸收和N2 O排放 ,增加了CO2GC MS was used to measure the greenhouse emission of Inner Mongolia Grassland. The results showed that four kinds of typical semi arid grasslands in Inner Mongolia had their own special seasonal patterns as the source of atmospheric N 2O and CO 2 emission and the sink of atmopsheric CH 4,which were controlled by seasonal weather variation. Different soil and vegetation types and precipitation influenced the intensity of emission and upatake of the gases. Compared with natural grassland,free grazing decreased CH 4 uptake and N 2O emission,but increased CO 2 emission.

关 键 词：草原 自由放牧 吸收 排放 

分 类 号：S812[农业科学—草业科学]