【摘要】 稻田作为大气中N2O的重要来源而倍受关注。硝化反硝化是土壤中N2O生成的两个主要的微生物过程,水分管理是影响稻田土壤N2O产生排放的重要因素之一。本文综述了水稻生长期和非水稻生长期水分管理对N2O排放的季节变化、N2O产生和排放途径、N2O-N排放系数以及与N2O产生排放过程相关的土壤N素形态、浓度和土壤酶活性的影响,并提出了有待研究的问题。更多还原

【Abstract】 It is of prevalent concern that rice paddy soil is one of the N2O sources to the atmosphere. Nitrification and denitrification are two microbial processes to produce N2O in soil. Water management is an important factor affecting N2O emission from rice paddy field. In this paper a review was presented to summarize the effect of water management during rice growing period and non-rice growing period on seasonal variations of N2O emission, pathways of N2O production, pathways of N2O emission, N2O-N emission factor and on nitrogen form or concentration and soil enzyme which are correlative to the process of N2O production and emission. This review also put forward the perspective for further study.更多还原