WANG Mengxue,ZHANG Zhongxue,Lü Chunbo,et al.CH4 and N2O Emissions from Rice Paddy Field and Their GWPs Research in Different Irrigation Modes in Cold Region[J].Research of Soil and Water Conservation,2016,23(02):95-100.
不同灌溉模式下寒地稻田CH4和N2O排放及温室效应研究
- Title:
- CH4 and N2O Emissions from Rice Paddy Field and Their GWPs Research in Different Irrigation Modes in Cold Region
- 分类号:
- S274.3
- 摘要:
- 为了研究寒地稻田CH4和N2O排放特征，选取黑龙江省寒地稻田为研究对象，采用静态箱—气相色谱法对控制灌溉、间歇灌溉、浅湿灌溉及淹灌四种水分管理模式等4个处理的CH4和N2O排放通量进行观测。结果表明，不同灌溉模式下的CH4和N2O排放高峰均出现在水稻生长旺季，而休闲期内排放较少。相对于淹灌，浅湿灌溉稻田CH4累积排放量降低了27.2%，控制灌溉处理的降低了34%，间歇灌溉处理的降低了48.2%。长期淹灌稻田N2O排放量比间歇灌溉稻田减少0.41 kg/hm2，比控制灌溉稻田增加0.38 kg/hm2，比浅湿灌溉稻田增加0.37 kg/hm2。总体温室效应分析，节水灌溉模式能有效抑制温室气体的排放并显著地降低CH4和N2O的总温室效应。水稻生育期内，CH4排放量减少时期，N2O排放量有增加趋势，综合考虑CH4和N2O排放的消长关系，才能有效减缓稻田温室气体的排放。
- Abstract:
- CH4 and N2O emission fluxes were measured in rice paddy field of cold region in Heilongjiang under four moisture management modes by using the method of static chamber-gas chromatograph technique. Four different treatment methods including control irrigation, wet irrigation, intermittent irrigation and flood irrigation were utilized in order to study the CH4 and N2O emission characteristics. The results indicated that the CH4 and N2O emission peak appeared in the rice vigorous growth period and the emissions reduced in leisure period no matter what kind of irrigation methods were utilized. Compared with flood irrigation, the CH4 emission of wet irrigation decreased by 27.2%,the CH4 emission of control irrigation decreased by 34%, and intermittent irrigation model significantly decreased by 48.2%. Flood irrigation paddy N2O emissions reduced 0.41 kg/hm2 compared to the intermittent irrigation paddy fields, increased 0.38 kg/hm2 compared to control irrigation and increased 0.37 kg/hm2 compared to wet irrigation paddy. With respect to analyzing overall greenhouse effect, water saving irrigation mode can effectively decrease and control CH4 and N2O emissions. At rice growth stages, N2O emissions increased accordingly in the period of CH4 emissions reduction. By considering the relationship of the growth and decline between CH4 and N2O emissions, the paddy fields of greenhouse gas emissions can be effectively slowed down.
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备注/Memo
收稿日期:2015-03-01;改回日期:2015-04-23。
基金项目:国家科技支撑计划“大型灌区节水技术集成与示范”（2012BAD08B05）
作者简介:王孟雪(1978-),女,黑龙江省铁力市人,博士研究生,主要从事农田温室气体排放方面的研究工作。E-mail:wangmengxue1978@163.com
通讯作者:张忠学(1965-),男,黑龙江省哈尔滨人,教授,博士生导师,研究方向为节水农业理论与技术。E-mail:zhangzhongxue@163.com