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- 2017
青藏高原东缘高寒草甸生长季自然放牧母牦牛CO2和CH4呼吸排放通量特征
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Abstract:
摘要 为了揭示自然放牧母牦牛温室气体的排放特征，在青藏高原东部的高寒牧区采用开路回流式面罩-气相色谱相结合的方法对不同年龄阶段放牧母牦牛进行CO2和CH4呼吸排放通量的研究。结果如下。1）年龄对CO2和CH4呼吸排放速率和通量具有显著影响；进食对CH4呼吸排放速率有显著影响。2）1~2岁牦牛试验组高寒草甸生长季平均CH4和CO2呼吸排放通量分别为54.59和2 663.71 g/（头·d）；3~4岁试验组分别为80.48和3 715.17 g/（头·d）；5~6岁试验组分别为84.45和4 663.55 g/（头·d）。3）CO2和CH4呼吸排放通量与血液生化指标具有相关性，并且年龄是影响生化指标的重要因素之一。4）自然放牧母牦牛的甲烷排放量远低于在不同区域放牧的其他牛科动物。
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