[Atmospheric dry and wet nitrogen deposition in typical agricultural areas of North Shaanxi].
To investigate the farmland soil nitrogen input from atmospheric dry and wet deposition, a 1-year observation was conducted in the Yulin and Luochuan areas of North Shaanxi Province from June 2007 to May 2008. The total inorganic nitrogen (TIN) deposition in Yulin and Luochuan was 22.17 and 16.95 kg x hm(-2) x a(-1), among which, wet deposition accounted for 95.1% and 90.4%, while dry deposition accounted for 4.9% and 9.6%, respectively, illustrating that the nitrogen deposition in both Yulin and Luochuan was mainly come from wet deposition. In the TIN deposition, the amount of nitrate in Yulin and Luochuan was 12.22 and 9.24 kg x hm(-2) xa(-1), accounting for 55.1% and 54.5%, respectively. The amount of wet deposition and the percentage of nitrate in TIN deposition were higher in Yulin than in Luochuan, because of the differences in pollution level, weather condition, and underlying surface characteristics.
Wei
Yang
Y
College of Resources and Environmental Sciences, Northwest Agriculture & Forestry University, Yangling 712100, Shaanxi, China. weiyang1120@163.com
Tong
Yan-An
YA
Duan
Min
M
Qiao
Li
L
Tian
Hong-Wei
HW
Lei
Xiao-Ying
XY
Ma
Wen-Juan
WJ
D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere / Q000032:analysis; D002681:China; D018556:Crops, Agricultural / Q000254:growth & development*; D004785:Environmental Pollutants / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis*; D011891:Rain; D012987:Soil / Q000032:analysis
D000393:Air Pollutants; D004785:Environmental Pollutants; D012987:Soil; D009584:Nitrogen