| 稻田甲烷排放的初级模式 |
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| 引用本文： | 丁爱菊,王明星.稻田甲烷排放的初级模式[J].大气科学,1995,19(6):733-740. |
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| 作者姓名： | 丁爱菊 王明星 |
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| 作者单位： | 中国科学院大气物理研究所,北京 100029 |
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| 基金项目： | 国家攀登计划85-27项 |
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| 摘 要： | 本文建立了一个区域尺度稻田生态系统CH4排放的初步模式，该模式能从理论上反映稻田CH4产生、传输与排放的机理，并提供了一种估计不同区域气候和土壤条件下稻田生态系统CH4排放总量的有效方法。模式主要包括三个部分:水稻的生长、土壤有机物的分解和CH4的产生、传输及排放过程。模式分别模拟了早稻和晚稻CH4的排放，模拟结果与实测比较接近，CH4的季平均排放量，模拟值与实测值的偏差在10% 左右。模式的敏感性实验表明，温度是稻田CH4排放规律的主要控制因子。
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| 关 键 词： | 甲烷 模式 水稻生长 稻田 |
A Preliminary Model for Methane Emission from Rice Fields |
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| Ding Aiju and Wang Mingxing.A Preliminary Model for Methane Emission from Rice Fields[J].Chinese Journal of Atmospheric Sciences,1995,19(6):733-740. |
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| Authors: | Ding Aiju and Wang Mingxing |
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| Abstract: | A preliminary numerical model is built to describe the production and subsequent transport of methane in rice fields. The model embodies the effect of weather condition and acme field managements on the methane emission rate. The model includes three major segments which are highly interactive in nature; growth of rice, decomposition of soil organic matter and production, transportation and emission of methane. Explicit equations for modeling each segment mentioned above are given. The main results are:1) The seasonal variation of methane emission obtained from t.he model quite agrees with that from field experiments. The difference of seasonal average methane emission rate between modeling value and experiment data is about 10%. 2) During the whole rice growing period, the seasonal variation of transport abilitity of rice plant in model calculation is similiar to the experiment data. It increases with time and reaches maximum during the stage in the middle of heading. 3) The content of soil organic matter is one of the major factors which determines methane average emission rate, and temperature controls the trend of methane emission from rice fields. |
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| Keywords: | methane model rice field rice growth |
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