广东省不同地区稻田甲烷排放的差异性及其模型估计  

Difference and Model Estimation of Paddy Field Methane Emission From Different Areas of Guangdong

作　　者：王兵[1] 郑璟[1] 刘锦銮[1] 杜尧东[1] Wang Bing;Zheng Jing;Liu Jinluan;Du Yaodong(Guangdong Provincial Climate Center,Guangzhou 510080,China)

机构地区：[1]广东省气候中心,广州510080

出　　处：《气象与环境科学》2018年第3期39-46,共8页Meteorological and Environmental Sciences

基　　金：广东省低碳发展专项资金项目(2017-39000-42060292);广东省气象局科研项目(2012B07)资助

摘　　要：减少温室气体排放以减缓全球变暖是当前全球变化研究的主要关注点。制定区域适应性的减排措施,有赖于对不同环境条件下温室气体排放空间差异性的进一步研究。广东是我国主要的双季稻种植区,其气候条件及稻田耕作方式都有别于我国其他稻区的。为估算广东省区域稻甲烷(CH_4)排放情况,利用IPCC2006清单指南中的稻田甲烷模型——CH_4MOD,模拟计算了2010年广东省21个地市双季早(晚)稻CH_4排放量及其排放因子。结果显示:1) 2010年稻田CH_4排放量为60. 74万t,其中双季晚稻CH_4排放量35. 01万t,双季早稻CH_4排放量25. 73万t。2)稻田CH_4排放量空间分布不均,区域稻田甲烷排放量为粤西的>粤北的>珠江三角洲的>粤东的,排放量分别为21. 22万t、17. 02万t、15. 14万t、7. 36万t。3)双季早稻CH_4排放因子明显小于晚稻的,双季早稻CH_4排放因子为261. 18 kg CH_4/hm^2,双季晚稻为358. 53 kg CH_4/hm^2。4)空间上,粤西地区稻田CH_4排放因子水平较高,粤北、粤东的处于中等水平,珠江三角洲稻田CH_4排放水平最低。Mitigating global warming by reducing greenhouse gases （GHGs） emissions is one of hot spot of global climate change.To make more reasonable regional adapting mitigation measures and policy needs further study on the spatial differences of GHGs emissions in different environmental conditions.Guangdong is the main province planting double cropping rice,with special growth climate conditions and tillage methods.In order to evaluate Methane（CH4） emission,CH4 emission of double cropping rice and emission factor from 21 cities in 2010 are simulated by using a coupling model （CH4MOD） from IPCC2006 list guide.Results are as follows.1）The total amount of CH4 emission of Guangdong in 2010 is 60.74×104 t,including 25.73×10^4 t for early rice and 35.01×10^4 t for late rice.2）CH4 emission from different areas of Guangdong varied obviously.The results are estimated to be 21.22×10^4 t,17.02×10^4 t,15.14×10^4 t and 7.36×10^4 t for the west,the north,the Pearl River Delta and the east respectively.3）CH4 emission factor of late rice is significantly higher than that of early rice,which is estimated to be 358.53 kg CH4/hm^2 and 261.18 kg CH4/hm^2 respectively.4）In the spacial distribution,CH4 emission factor from rice paddy reveals that highest emission region is in the west,the medium are in the north and east of Guangdong,while lowest emission area covers Pearl River Delta.

关 键 词：CH4MOD 稻田 甲烷排放 广东 

分 类 号：S153[农业科学—土壤学]