文献类型：期刊文献

中文题名：开化县林区氮磷沉降特征

英文题名：Atmospheric deposition of nitrogen and phosphorus in forest regions in Kaihua County

作者：周世水[1] 党宁[2] 张涵丹[2] 王金忠[3] 叶永臣[3]

第一作者：周世水

机构：[1]开化县林场,浙江衢州324300;[2]中国林业科学研究院亚热带林业研究所,浙江杭州311400;[3]建德市新安江林场,浙江建德311600

年份：2022

卷号：4

期号：4

起止页码：72-80

中文期刊名：环境生态学

外文期刊名：Environmental Ecology

基金：浙江省省院合作林业科技项目(2021SY12);国家自然科学基金(41807151)资助。

语种：中文

中文关键词：混合沉降;氮;磷;后向轨迹

外文关键词：Bulk deposition;nitrogen;phosphorus;backward trajectory

分类号：X51

摘要：钱江源区域森林资源丰富,森林覆盖率高,为更好地了解区域大气污染现状,了解氮、磷沉降的时空分布特征,以钱江源源头所在县——开化县为研究区,于2021年5—9月,采用混合沉降(湿沉降+干沉降)监测方法对区域内9个主要林区的氮、磷沉降浓度、通量、主要形态及其空间差异进行分析。结果显示:大气沉降中总氮(TN)的平均浓度为(0.36±0.20)mg/L,NO_(3)^(-)-N和NH_(4)^(+)-N占TN浓度的比例分别为51.28%和39.19%;总磷(TP)平均浓度分别为(0.06±0.04)mg/L;各林区沉降氮、磷浓度均表现出明显的月际变化,其中总氮最高值出现在9月,而总磷以6月最高;TN和TP的年沉降通量约为6.59和1.10 kg/(hm^(2)·a);空间上,氮沉降主要集中在中心城区,磷沉降则以西北山区较高,中心城区和东部地区较低,呈现出西高东低的分布特征;由后向轨迹分析可知,西部区域或为开化县大气氮磷沉降的潜在来源。
To reveal the status of regional pollution status and clarify the potential pollution sources,we selected nine major forest areas in Kaihua County as objects,the mass concentration,monthly variation,and spatial distributions of total nitrogen(TN),nitrate nitrogen(NO_(3)^(-)-N),ammonia nitrogen(NH_(4)^(+)-N),and total phosphorus(TP)in bulk deposition were analyzed by field monitoring and model simulation.Results showed that the average deposition concentration of TN was(0.36±0.20)mg/L,and the percentages of nitrate and ammonium contributed 51.28%and 39.19%of TN,respectively.The average deposition concentration of TP was(0.06±0.04)mg/L.The deposition of nitrogen and phosphorus concentrations showed significant monthly variations,with the highest value in September and June for TN and TP,respectively.The annual bulk deposition of TN and TP were about 6.59 and 1.10 kg/(hm^(2)·a).Spatially,nitrogen deposition was mainly concentrated in the central urban area,while phosphorus deposition was mainly concentrated in the northwestern mountainous area.The backward trajectory analysis showed that the western region may be the potential source of nitrogen and phosphorus deposition in Kaihua County.