| 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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| 作者姓名： | 薛丹 熊婉 何奕忻 朱单 吴宁 陈槐 |
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| 作者单位： | 1. 中国科学院成都生物研究所, 成都 610041;
2. 四川大学生命科学学院, 成都 610064;
3. 中国科学院大学, 北京 100049;
4. 国际山地综合发展中心, 加德满都 GPO Box 3226, 尼泊尔 |
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| 基金项目： | 四川省青年科技创新团队（2015TD0026）、四川省“千人计划”项目和中国科学院“百人计划”项目资助 |
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| 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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| 关 键 词： | 甲烷 二氧化碳 采食量 年龄 血液生化指标 |
| 收稿时间： | 2016-06-15 |
| 修稿时间： | 2016-10-14 |
Respiratory CO2 and CH4 emission fluxes from naturally grazing female yak in eastern region of Qinghai-Tibetan Plateau during alpine meadow growing season |
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| Authors: | XUE Dan XIONG Wan HE Yixin ZHU Dan WU Ning CHEN Huai |
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| Institution: | 1. Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China;
2. College of Life Sciences, Sichuan University, Chengdu 610064, China;
3. University of Chinese Academy of Sciences, Beijing 100049;
4. International Centre for Integrated Mountain Development, GPO Box 3226, Kathmandu, Nepal |
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| Abstract: | In order to reveal the characteristics of the greenhouse gas emissions from naturally grazing female yak in Qinghai-Tibetan Plateau during the growing season, a combination of face mask and GC methods was used to measure the respiratory CO2 and CH4 emissions from three age groups of yak. The results showed that age had a significant impact on greenhouse gas emission rate and emission flux. Feeding significantly influenced CH4 emission rate. The average emission fluxes of CH4 and CO2 in 1-2-year-old group were 54.59 and 2 663.71 g·head-1·d-1, respectively, and they were 80.48 and 3 715.17 g·head-1·d-1 in 3-4-year-old group and 84.45 and 4 663.55 g·head-1·d-1 in 5-6-year-old group, respectively. The respiratory CO2 and CH4 emission fluxes were positively correlated with yak biochemical parameters, which changed with age. The respiratory CH4 emissions of yak are lower than bovine raised by freely grazing in other regions. |
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| Keywords: | methane carbon dioxide feed intake age biochemical parameters |
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