[A review on development of stable isotope technique in the studies of N2O formation mechanism]. / ç¨³å®šåŒä½ç´ æŠ€æœ¯åœ¨åœŸå£¤N2Oæº¯æºç ”ç©¶ä¸­çš„åº”ç”¨.

As one of three major greenhouse gases, nitrous oxide (N2O) has solicited substantial attention. Stable isotope has been widely used to explore the sources of N2O emissions. Here, we briefly introduced the microbial processes involved in N2O emissions, and the main influencing factors. We further summarized the development of N2O isotope signature of δ15N, δ18O and SP (site preference of 15N in different positions of N2O molecule) in exploring the N2O formation mechanism. The application of these techniques, especially the SP values, is still at the primary stage in China. Therefore, this paper focused on the development of the isotope ratios analysis in partitioning N2O sources from foreign countries, and put forward suggestions on the future research in China.