中国稻田甲烷产生和排放研究 Ⅱ.模式研究和减排措施

主要介绍了近 2 0年来稻田甲烷排放的模式研究和排放量的估算以及减少稻田甲烷排放的措施。数值模式是估算稻田甲烷排放量的一条有效途径 ,模式的研究现在正处于发展阶段。介绍了几个主要的模型 ,既有物理过程模型也有经验模型。年排放量的估算范围为 6 79～ 4 1 4Tg ,随着技术的发展和大量实验的进行估算值的精度正得到不断的提高。减排措施是减少稻田甲烷排放的必要手段 ,但是目前的减排技术均处于研究阶段 ,应用还不成熟

A Review on Study of Methane Emission from Rice Field in China Ⅱ.Model and Mitigation Method

The advances for more than 20 years' studies of methane emission from rice paddy fields in China are reviewed, including the study of methane emission models and estimated methane emission from rice fields; possible techniques for reducing methane emission. Numerical model is an effective method to estimate the total amount of methane emission from rice fields. Model study is now in the developing phase. Several primary models are introduced: physical process model and empirical Model. Estimated methane emission from rice fields is ranging from 6.79 to 41.4Tg/yr. The precision of estimated value has been improved with the development of science and technology and experiments as well. Mitigation methods are necessary to reducing methane emission, but the methods are still in the phase of study and the application of mitigation techniques is not mature.