Monitoring and evaluation of global warming gas derived from dairy cow under heat stress

奶牛是如此的热应激敏感，应对最近的全球变暖的措施应该是必要的奶牛养殖。另一方面，来自奶牛身体的甲烷气体，估计占全球排放量的25%，是农业中与水稻种植一起沿着的主要来源。为了揭示热应激对奶牛生理状态所产生的甲烷和二氧化碳排放量的影响，利用二氧化碳气体分析仪构建了热应激监测系统。动态室法应在一定的流动条件下操作，否则应在夜间使用流体分析，以提高气体通量评估的准确性。

The dairy cow is so heat stress-sensitive that countermeasures against recent global warming should be necessary in dairy farming. On the other hand, methane gas derived from dairy cow body, estimated to be 25% of global emission, is the major source along with the paddy rice cropping in agriculture. In order to reveal the influence of heat stress on methane and the carbon-dioxide emissions, which are exerted by the physiology state of a dairy cow, the monitoring system was constructed by using a carbon dioxide gas analyzer. The dynamic chamber method should be operated as far as certain flow conditions, otherwise a fluid analysis should be used during the night time to enhance the accuracy of the gas flux evaluation.