不同耕作模式下稻—油系统CO2和CH4净交换量动态变化研究.pdf

110 CROP RESEARCH 2017,31(2) 不同耕作模式下稻一油系统〔〇2和 ch4 净交换量动态变化研究 成小琳,唐先亮，魏甲彬,周玲红，徐华勤4，邹应斌,唐剑武 (湖南农业大学农学院，长沙41〇128) 摘 要 :为了探讨不同耕作方式对稻田生态系统C 02 和 CH4 净交换量的影响，采用温室气体自动分析仪与循环采 气式静态箱法相结合,通过对比不同生育期，对长期免耕和常规翻耕两种耕作方式下稻油两熟制农田生态系统 C 02 和 CH4 日净交换量动态变化进行分析，结果表明，免耕处理稻田系统C 02 净吸收总量和CH4 净排放总量分别 比翻耕处理高11. 7 5 % 和 16. 55% ;稻田系统C 02 和 CH4 净交换总量主要发生在水稻种植阶段;水稻种植阶段稻 田系统C 02 净交换量占净交换总量的7 0% 左右,CH4 净交换量占交换总量的9 9 % 以上。全年来看,免耕模式下稻 田系统C 02 吸收增加而CH4 排放加剧。 关键词 :稻田系统;耕作方式;C 02; CH4 ; 净交换量 中图分类号:S314 文献标识码:A 文章编号= 1001-5280(2017)02~0110~05 DOI ：10. 16848/j. cnki. issn. 1001-5280. 2017. 02. 02 Effects of Different Tillage Methods on C02 and CH4 Net Exchange in Rice - oilseed Rape Cropping System CHENG Xiaolin，TANG Xianliang,WEI Jiabin，ZHOU Linghong , XU Huaqin* ,Z0 U Yingbin,TANG Jianwu (College of Agronomy, Hunan Agricultural University, Changsha, Hunan 410128 , China) A b strac t：To study the effect of different tillage methods on Net Ecosystem Exchange (N E E ) of C 02 and CH4 fluxes in daytime from farmland ecosystem, the effects of long - term no - tillage ( NT) and conventional tillage ( CT) treatments on daily C 02 and CH4 NEE during the different development stages of rice and oilseed rape were analyzed. The results showed that there was no significant difference in the daily C 02 and CH4 NEE between NT and CT. Over the entire season， the C 02 NEE of NT (net uptake) was higher than that of CT by 11. 75% , and the CH4 NEE of NT (emission) was higher than tha