浙江农业学报 ›› 2017, Vol. 29 ›› Issue (1): 119-128.DOI: 10.3969/j.issn.1004-1524.2017.01.17

• 环境科学 • 上一篇    下一篇

太湖流域典型稻田大气氨排放特征及其影响因子

陈园1, 房效凤1, 2, 沈根祥2, *, 徐昶2, 钱晓雍2, 赵子刚3, 于绍凤3, 李金文2, 王振旗2   

  1. 1.华东理工大学 资源与环境工程学院,上海 200237;
    2.上海市环境科学研究院,上海 200233;
    3.上海青浦现代农业园区,上海 201717
  • 收稿日期:2016-07-20 出版日期:2017-01-15 发布日期:2017-02-23
  • 通讯作者: 沈根祥,E-mail:shengx@saes.sh.cn
  • 作者简介:陈园(1992—),女,江苏句容人,硕士研究生,从事农村生态环境保护研究。E-mail:286870440@qq.com
  • 基金资助:
    上海市环保科研项目(沪环科2014-25,2015-98); 上海市自然科学基金项目(15ZR1434900)

Research on ammonia emission characteristics and its influencing factors from paddy fields in Taihu Lake region

CHEN Yuan1, FANG Xiaofeng1, 2, SHEN Genxiang2, *, XU Chang2, QIAN Xiaoyong2, ZHAO Zigang3, YU Shaofeng3, LI Jinwen2, WANG Zhenqi2   

  1. 1. College of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237,China;
    2. Shanghai Academy of Environmental Sciences, Shanghai 200233, China;
    3. Shanghai Qingpu Modern Agriculture Park, Shanghai 201717, China
  • Received:2016-07-20 Online:2017-01-15 Published:2017-02-23

摘要: 应用微气象学水平通量法对太湖流域水稻种植季节不同施肥阶段大气氨排放特征进行监测,并对田间水NH4+-N浓度和pH、土壤N H4+-N浓度和温度、大气风速等参数进行同步观测。结果表明,水稻种植期间,尿素施用后分蘖肥和穗肥时期的氨排放损失率分别为28.47%和14.01%,各时期氨排放通量大小依次为Ⅱ期分蘖肥>Ⅰ期分蘖肥>穗肥,氨挥发持续时间均为7~11 d。田间水N H4+-N浓度是分蘖肥时期影响氨排放水平最主要的因子,决定系数R2达到了0.745 4;而风速、土壤N H4+-N浓度、土壤温度是穗肥时期影响氨排放水平的主要影响因子,决定系数R2分别为0.965 1、0.787 5、0.896 0。

关键词: 微气象学, 氨, 排放通量

Abstract: Ammonia volatilization was monitored via micrometeorological technique in different fertilization periods in paddy fields of Taihu Lake region. Factors influencing ammonia loss, such as N H4+-N concentration, pH in floodwater, N H4+-N concentration in soil, soil temperature, wind speed, were also studied at the same time. The results indicated that ammonia volatilization loss was 28.47% in the period of tillering-top dressing, and was 14.01% in ear bearing-top dressing period after urea application. The ammonia volatilization flux after urea application in varied period decreased as the second period of tillering-top dressing>the first period of tillering-top dressing>ear bearing-top dressing period. Ammonia volatilization lasted 7-11 d. N H4+-N concentration in floodwater was the most important influencing factor in the period of tillering-top dressing, with determination coefficient (R2) of 0.745 4. The important influencing factors in ear bearing-top dressing period included wind speed, N H4+-N concentration in soil and soil temperature, with R2 being 0.965 1, 0.787 5 and 0.896 0, respectively.

Key words: micrometeorological technique, ammonia, volatilization flux

中图分类号: