陕西省不同生态区大气氮素干湿沉降的时空变异

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 陕西省不同生态区大气氮素干湿沉降的时空变异 DOI: 10.5846/stxb201211011517 作者: 作者单位: 西北农林科技大学资源环境学院,西北农林科技大学资源环境学院,陕西省长安区气象局,中国农业大学,陕西省气象局,西北农林科技大学资源环境学院 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金资助项目（40675006） Spatial-temporal variability of dry and wet deposition of atmospheric nitrogen in different ecological regions of Shaanxi Author: Affiliation: College of Resources and Environmental Sciences,Northwest A F University,Yangling Shaanxi,College of Resources and Environmental Sciences,Northwest A F University,Yangling Shaanxi,Weather Bureau of Changan District,Xi’an,China Agricultural University,Weather Bureau of Shaanxi Province,Xi’an,College of Resources and Environmental Sciences,Northwest A F University,Yangling Shaanxi Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:为研究陕西省不同生态区大气氮素干湿沉降的时空变化规律，于2009年11月至2010年10月对4个生态区5个监测点的干湿沉降输入量进行为期1a的观测。结果表明：监测期内，榆林、洛川、西安、杨凌和安康地区总N沉降量分别为4.7、11.9、25.8、31.9和19.2 kg/hm2，其中N湿沉降量分别为2.9、10.4、24.8、27.7和16.3 kg/hm2，占总沉降的62%-96%，N干沉降量分别为1.8、1.5、1.0、4.1和2.9 kg/hm2，占4%-38%，且湿沉降与降雨量之间呈正相关关系，干沉降与之相反；各地区NH4+-N沉降量分别为2.0、6.4、17.0、17.2和11.9 kg/hm2，占总沉降的44%-66%，NO3--N沉降量分别为2.6、5.5、8.8、14.7和7.3 kg/hm2，占34%-56%，除榆林地区外，其他地区以NH4+-N沉降为主。 Abstract:The objective of this experiment was to study the spatial-temporal variability of dry and wet deposition of atmospheric nitrogen in different ecological regions of Shaanxi Province. Measurements were made at five monitoring sites in four different ecological regions from November 2009 to October 2010. The amounts of total inorganic nitrogen (TIN) deposition were 4.7 kg/hm2 at Yulin, 11.9 kg/hm2 at Luochuan, 25.8 kg/hm2 at Xi'an, 31.9 kg/hm2 at Yangling, and 19.2 kg/hm2 at Ankang. Wet deposition accounted for 62 to 96% of the TIN deposition, ranging from 2.9 kg/hm2 at Yulin, 10.4 kg/hm2 at Luochuan, 24.8 kg/hm2 at Xi'an, 27.7 kg/hm2 at Yangling, and 16.3 kg/hm2 at Ankang. Dry deposition accounted for 4 to 38% of the TIN deposition, ranging from 1.8 kg/hm2 at Yulin, 1.5 kg/hm2 at Luochuan, 1.0 kg/hm2 at Xi'an, 4.1 kg/hm2 at Yangling, and 2.9 kg/hm2 at Ankang. Wet deposition and rainfall were positively correlated, whereas dry deposition and rainfall were negatively correlated. Ammonium nitrogen (NH4+-N) deposition amounts were 2.0 kg/hm2 at Yulin, 6.4 kg/hm2 at Luochuan, 17.0 kg/hm2 at Xi'an, 17.2 kg/hm2 at Yangling, and 11.0 kg/hm2 at Ankang. These amounts accounted for 44 to 66% of the TIN deposition. Nitrate nitrogen (NO3--N) amounts were 2.6 kg/hm2 at Yulin, 5.5 kg/hm2 at Luochuan, 8.8 kg/hm2 at Xi'an, 14.7 kg/hm2 at Yangling, and 7.3 kg/hm2 at Ankang. These amounts made up 34 to 56% of the TIN deposition. Nitrogen deposition is mainly in the form of NH4+-N in all regions except Yulin. 参考文献 相似文献 引证文献