Dynamics and ecological significance of nitrogen wet-deposition in Taihu Lake region—Taking Changshu Agro-ecological Experiment Station as an example

Abstract

Abstract: Nitrogen wet deposition was monitored for two years (2001.6～2003.5) at the Changshu Ecological Station in Taihu Lake region.The results showed that the amount of nitrogen wet deposition had a strong seasonal pattern,with higher levels in summer and spring,and low values in autumn and winter.The proportions of NH₄^{+3^{-4^{+4^{+R²=0.3178 ^**),while the monthly NO₃^{-R²=0.1985 ^*) with monthly rainfall but positively related with the time of rainfall (R²=0.6757 ^***).The NO₃^{-R²=0.4205 ^***).The annual TN input from wet deposition was 27.0 kg·hm^-2,but its concentration in each rainfall was higher than 0.2 mg·L^-1 (the threshold N concentration for inland water eutrophication).The nitrogen inputted by wet deposition had an ecological significance on both nitrogen balance in agroecosystem and eutrophication.}}}}}}

Key words: Taihu Region, Nitrogen wet deposition, Seasonal dynamics, Ecological significance

CLC Number:

X131.2

WANG Xiaozhi, ZHU Jianguo, GAO Ren, HOSEN Yasukazu . Dynamics and ecological significance of nitrogen wet-deposition in Taihu Lake region—Taking Changshu Agro-ecological Experiment Station as an example[J]. Chinese Journal of Applied Ecology, 2004, (9): 1616-1620.

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