Atmospheric nitrogen wet deposition and nitrogen volatilization in Chinese chive planting field of a typical agricultural area at northern bank of Dianchi Lake
Abstract:One–year monitoring study was conducted to estimate wet N deposition to in Chinese chive planting field of a typical agricultural area at northern bank of Dianchi Lake. Nitrogen volatilization was also investigated in soils of Chinese chive planting fields, in situ field Chinese chive decomposition, and in ditch sewage water. The total wet N deposition was 7.1kg N/hm2 in 2007, about 89% of N deposition occurred during the rainy season of April to September. The cumulative ammonia volatilization loss 35days after N fertilization accounted for 25% of supply N as urea (345 kg N/hm2), about 96% of ammonia volatilization loss occurred during the first 9days after N fertilization. The cumulative N volatilization loss accounted for 27%~38% of total N in the ditch sewage water containing 7~51mg N/L (2.7~25.8mg N/L as NH3-N) within open storage for 12days. Therefore, nitrogen volatilization in Chinese chive planting fields could be one of important sources of atmospheric nitrogen in the present investigation area.
陆海燕, 胡正义, 张瑞杰, 殷小锋, 逢玉万, 吴永红. 滇池北岸典型农区韭菜田大气氮湿沉降与氮挥发研究[J]. 中国环境科学, 2010, 30(10): 1309-1315.
LU Hai-Yan, HU Zheng-Yi, ZHANG Rui-Jie, YIN Xiao-Feng, FENG Yu-Wan, WU Yong-Hong. Atmospheric nitrogen wet deposition and nitrogen volatilization in Chinese chive planting field of a typical agricultural area at northern bank of Dianchi Lake. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(10): 1309-1315.