XIAO Wan-li,LI Jun-liang,CHEN Qing.Research on the Daily Variation Changes of the Nitrous Oxide Emissions of Greenhouse Vegetable Soil[J].Northern Horticulture,2014,38(01):44-46.
设施菜田土壤一氧化二氮日排放特征观测研究
- Title:
- Research on the Daily Variation Changes of the Nitrous Oxide Emissions of Greenhouse Vegetable Soil
- 文章编号:
- 1001-0009（2014）01-0044-03
- 关键词:
- 设施菜田; 一氧化二氮（N2O）; 日排放; 追肥
- 分类号:
- S 153.6
- 文献标志码:
- A
- 摘要:
- 以山东省寿光市设施菜田为研究对象，利用静态箱/气相色谱法对寿光市设施菜田进行一氧化二氮（N2O）排放通量的日变化观测，研究了N2O气体日排放规律及静态箱法测定N2O排放的适宜观测时间，以期为设施菜田N2O减排提供理论依据。结果表明：追肥后N2O排放日变化规律与表层土温（2、10 cm）日变化基本同步，15：00~16：00左右出现N2O排放通量最大值；追肥前N2O排放日变化具有一定的随机性，随时间的变化波动性较大，与表层土温日变化的同步性较差；追肥显著促进了N2O的排放，表层土温是追肥后N2O规律性日变化的主控因素；运用静态箱人工采样的方法进行设施菜田土壤N2O排放观测时，最适宜的采样时间追肥前应保持在8：00~10：00，追肥后应保持在9：00~11：00。
- Abstract:
- Taking Shouguang greenhouse vegetable soil as the research object,through the way of the Static Chamber/gas chromatography,the daily variation changes of the Nitrous Oxide（N2O） emission flux was observed,the regular pattern of the daily variation changes of the N2O emission flux and the best observation time were researched,in order to provide theoretical basis for the reduction of the N2O emission flux of greenhouse vegetable soil.The results showed that the regularity of diurnal variation occurred after the topdressing,and N2O emissions and the surface soil temperature (2,10 cm) daily variation changes almost in the same step.The max of the N2O emission flux appearred in 15:00~16:00；the N2O emission flux was stochastic before the topdressing,which in the poor accordance of the surface soil temperature.The topdressing accelerate the N2O emission,the surface soil temperature was the key factor of the changement of the N2O emission flux.The most appropriate sampling time before topdressing should be maintained at 8:00~10:00,after topdressing should be maintained at between 9:00~11:00.
参考文献/References:
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备注/Memo
第一作者简介：肖万里（1979-），男，山东青岛人，博士研究生，讲师，现主要从事设施蔬菜生理生态与土壤生态等研究工作。E-mail：xiaowanli1818@163.com.