Characteristics of Ammonia Volatilization of the Typical Calamagrostis angustifolia Wetland Soils in the Sanjiang Plain, Northeast China
From May to October in 2005, the ammonia (NH3) volatilization from the soils of typical meadow C. agustifolia wetland (TMCW) and marsh meadow C. agustifolia wetland (MMCW) in the Sanjiang Plain of Northeast China were determined in situ with venting method. Results showed that the change trends of NH3 volatilization rates and cumulative NH3 volatilization amounts on the two typical C. agustifolia wetland soils were basically the same. The NH3 volatilization rates of MMCW were relatively high, with an average value being 1.35±0.53 (S.D., n=16) folds of TMCW. In growing season, the total NH3 volatilization amounts of TMCW and MMCW soils were 0.635 gN/m2 and 0.687 gN/m2, respectively. Compared with the nitrogen wet deposition amount (0.757 gN/(m2·a) of Sanjiang Plain in 2005, the NH3 volatilization played an important role in the nitrogen balance of C. angustifolia wetland ecosystem. Further analysis indicated that the storage of soil nitrogenous compounds was not the limiting factor affecting NH3 volatilization process, while atmospheric temperature and other temperature fluctuations were the important factors affecting the changes of NH3 volatilization rates. The precipitation and the fluctuation and dissipation of soil water were the inducers of the partial fluctuation of NH3 volatilization rates, while soil pH and texture were the main factors inducing lower NH3 volatilization rates.
venting method ammonia volatilization Calamagrostis angustifolia wetland Sanjiang Plain.
SUN Zhigao YU Junbao CHEN Xiaobing
Key Lab of Coastal Wetland Ecology,Yantai Institute of Coastal Zone Research for Sustainable Develop Key Lab of Coastal Wetland Ecology,Yantai Institute of Coastal Zone Research for Sustainable Develop
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
78-83
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）