内蒙古天然与放牧草原温室气体排放研究

摘要/Abstract

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N₂O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N₂O排放,增加了CO₂的排放.

关键词: 草原, 自由放牧, 吸收和排放, 演化历史, 硅藻功能群, 湖泊生态, 表层沉积物, 空间分布

Abstract: GC-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 N₂O and CO₂ emission and the sink of atmopsheric CH₄,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 CH₄ uptake and N₂Oemission,but increased CO₂ emission.

Key words: Grassland, Free grazing, Uptake and emission, lake ecosystem, modern surface sediment, diatom functional group, evolutionary history., spatial distribution

中图分类号:

S812

王跃思, 薛敏, 黄耀, 刘广仁, 王明星, 纪宝明. 内蒙古天然与放牧草原温室气体排放研究[J]. 应用生态学报, 2003, (3): 372-376.

WANG Yuesi, XUE Min, HUANG Yao, LIU Guangren, WANG Mingxing, GI Baoming. Greenhouse gases emission or uptake in Inner Mongolia natural and free-grazing grasslands[J]. Chinese Journal of Applied Ecology, 2003, (3): 372-376.

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