水稻油菜轮作稻田甲烷排放及其总量估算  

Methane emission from rice-rape rotation paddy fields and its total amount estimation

作　　者：韩广轩[1] 朱波[1] 高美荣[1] 

机构地区：[1]中国科学院成都山地灾害与环境研究所,成都610041

出　　处：《中国生态农业学报》2006年第4期134-137,共4页Chinese Journal of Eco-Agriculture

基　　金：国家重点基础研究发展计划项目(2005CB121108);国家自然科学基金项目(40331014);国家粮食丰产科技工程项目(2004BA520A05)资助

摘　　要：利用静态箱/气相色谱法对川中丘陵区水稻油菜轮作稻田进行水稻全生长季CH4排放观测。结果表明,稻田CH4排放有明显的季节变化,呈“前低后高”的变化趋势,CH4排放峰出现在水稻抽穗扬花期;测定期内稻田CH4平均排放通量为6.20mg/m2.h。对影响稻田CH4排放的因素分析发现,淹水条件下水稻移栽到抽穗初期,水稻植株生长是影响稻田CH4排放的关键因素;水稻抽穗期到成熟期,温度是影响稻田CH4排放的关键因素。水稻油菜轮作稻田在水稻生长季中CH排放总量为173.96kg/hm2。Methane emission fluxes from rice-rape rotation paddy fields were measured by the static chamber-gas chromatographic techniques in hilly area of the central Sichuan Basin. The results show that CH4 emission from paddy fields varies remarkably and seasonally during the rice-growing season, and the peak value of methane emission is presented in the metaphase of rice bearing stage. The average flux of CH4 emission from paddy fields is 6.20 mg/m^2· h. The influencing factors on CH4 emission from paddy fields are discussed in this paper. The rice plants play a key role in the methane emission during the early growing stage of rice; while the temperature plays a key role in the methane emission during the tassel and mature stage of rice. The total amount of CH4 emission during the rice growing season is about 173.96kg/hm2.

关 键 词：CH4排放 稻田 稻油轮作 影响因子 排放总量 

分 类 号：S216[农业科学—农业机械化工程]