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ÖÐÎÄÕªÒª ʪµØÊÇÎÂÊÒÆøÌåÑõ»¯Ñǵª£¨N₂O£©ÖØÒªµÄÔ´»ò»ã£¬ÑμîʪµØ×÷ΪʪµØµÄÖØÒª×é³É²¿·Ö£¬Ñо¿ÆäN₂OÅŷŶÔÓÚ̽¾¿ÑμîʪµØN₂O²úÉúµÄÏõ»¯×÷ÓûúÖƼ°ÆÀ¹ÀÆäÔÚÎÂÊÒЧӦÖеÄ×÷ÓþßÓÐÖØÒªÒâÒå.±¾ÎĶԴú±íÐÔÑμîʪµØ¡ª¡ªÔúÁú«έÕÓÔóʪµØÉú³¤¼¾µÄN₂OÊÍ·ÅÁ¿¼°Ïà¹Ø»·¾³Òò×Ó½øÐÐÁËÑо¿.½á¹û±íÃ÷£¬Éú³¤¼¾N₂OͨÁ¿³Ê²¨¶¯ÐÔϽµÇ÷ÊÆ£¬×î´óÖµ³öÏÖÔÚ7ÔÂÖÐÑ®£¬Æ½¾ùÅÅ·ÅͨÁ¿Îª£¨37.49±15.75£©¦Ìg·£¨m²·h£©^-1£¬±íÏÖΪN₂OµÄÊÍ·Å"Ô´".N₂OͨÁ¿Ó벻ͬÉî¶ÈÍÁ²ãζȴæÔÚÏÔÖøÕýÏà¹Ø¹Øϵ£¨P<0.05£©£¬ÇÒÉϲãÍÁζÔN₂OÅŷŵÄÓ°Ïì³Ì¶È¸ßÓÚÉî²ãÍÁ£»ÑÍË®ÆÚ¼äN₂OͨÁ¿Óë»ýË®Éî¶È³ÊÏÔÖø¸ºÏà¹Ø¹Øϵ£¨P<0.05£©£»ÇÒÍÁÈÀTOCºÍTNº¬Á¿½ÏµÍ£¬N₂OͨÁ¿Óë0~40 cmÍÁ²ãNH₄⁺-Nº¬Á¿³ÊÏÔÖøÕýÏà¹Ø¹Øϵ£¨P<0.05£©£¬¶øÓ목NO₃^--Nº¬Á¿Ã»ÓйØϵ£¬Ïõ»¯×÷Óó̶ÈÒª±È·´Ïõ»¯Ç¿£»´ËÍ⣬ÍÁÈÀ°±Ñõ»¯¾ú»îÐÔÓë0~20 cmÍÁ²ãζȴæÔÚ¼«ÏÔÖøÕýÏà¹Ø¹Øϵ£¨P<0.01£©£¬ÇÒN₂OͨÁ¿Óë°±Ñõ»¯¾ú»îÐÔÒ²³Ê¼«ÏÔÖøµÄÏßÐÔÕýÏà¹Ø¹Øϵ£¨P<0.001£©£¬±íÃ÷ÑμîʪµØµÄN₂OÊÍ·ÅÊÜÏõ»¯×÷ÓÃÓ°Ïì¾Þ´ó. Ó¢ÎÄÕªÒª Wetlands are important sources and sinks for N₂O. Exploring the role of N₂O emissions in saline-alkali wetlands has great significance in understanding the nitrification mechanism of N₂O production and assessing the role of saline-alkali wetlands in the greenhouse effect. The present study examined the N₂O fluxes and environmental factors of a typical Zhalong reed wetland during the growing season. The results suggested that the N₂O fluxes tended to decrease in volatility, with the highest value in mid-July. The mean flux of N₂O was (37.49±15.75) ¦Ìg·(m²·h)^-1, indicating that the typical Zhalong reed wetland was a source of N₂O. The N₂O fluxes exhibited a significantly positive correlation with soil temperature at different depths (P<0.05), and the impact of the upper soil temperature on N₂O flux was higher than that of deep soil. In the flooding period, the relationship between N₂O fluxes and water table depth was negatively correlated (P<0.05). Meanwhile, the TOC and TN contents were lower, and the N₂O flux was significantly positively correlated with the NH₄⁺-N content in the 0-40 cm soil layer (P<0.05), but it was not related to NO₃^--N content. Nitrification was stronger than denitrification. There was a significant positive correlation between ammonia-oxidizing bacterial activity and soil temperature in 0-20 cm layer (P<0.01). Additionally, the activity of ammonia-oxidizing bacteria also presented significantly positive linear correlation with the N₂O fluxes (P<0.001), which indicated that the release of N₂O in saline-alkali wetlands was greatly affected by nitrification.

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https://www.hjkx.ac.cn/hjkx/ch/reader/create_pdf.aspx?file_no=20190245&flag=1&journal_id=hjkx&year_id=2019