利用细叶小羽藓监测盐城市大气硫沉降的空间变化及来源  

Spatial distribution and source analysis of atmospheric sulfur deposition using Haplocladium microphyllum biomonitoring in Yancheng,China

作　　者：周晓丽 杨惠鹏 周伟 董奎 倪茜 陆琳玉 张峻荣 严鹏 孙同兴 ZHOU Xiaoli;YANG Huipeng;ZHOU Wei;DONG Kui;NI Qian;LU Linyu;ZHANG Junrong;YAN Peng;SUN Tongxing(School of Marine and Biological Engineering,Yancheng Teachers University,Yancheng Jiangsu 224002;Co-innovation Centre for Sustainable Forestry in Southern China,Key Laboratory of State Forestry and Grassland Administration on Subtropical Forest Biodiversity Conservation,Nanjing Forestry University,Nanjing Jiangsu 210037;Jiangsu Key Laboratory for Bioresources of Saline Soils,Yancheng Jiangsu 224002;Bijie Natural Forest Resources Protection Center,Bijie Guizhou 551799)

机构地区：[1]盐城师范学院海洋与生物工程学院,江苏盐城224002 [2]南京林业大学南方可持续林业协同创新中心,国家林业和草原局亚热带森林生物多样性保护重点实验室,江苏南京210037 [3]江苏省盐土生物资源研究重点实验室,江苏盐城224002 [4]毕节市天然林资源保护中心,贵州毕节551799

出　　处：《环境污染与防治》2023年第8期1119-1125,共7页Environmental Pollution & Control

基　　金：江苏省产学研合作项目(No.BY2022444);江苏省盐土生物资源研究重点实验室开放课题(No.JKLBS2020003)。

摘　　要：苔藓组织硫含量可以反映一定区域内大气硫沉降状况。为了评估盐城市大气硫污染水平,采集了盐城市57份细叶小羽藓(Haplocladium microphyllum)样品,分析其硫含量、污染因子的空间分布特征,并探讨了硫的可能来源。结果表明:苔藓组织硫质量分数为0.08%~0.20%,呈现从东北部向西南部逐渐递增的趋势,在西南部里下河经济发展区苔藓组织硫含量最高,反映出农业肥料和农药的施用向大气输入了较高的硫。污染因子评价结果显示,总体上,盐城市大气硫污染水平为疑似污染,其中有71.93%的采样点为疑似污染,28.07%的采样点为轻度污染,受到轻度污染的采样点多分布于西南部。盐城市苔藓组织中的硫主要来源于农业活动(贡献率57.6%),其次是自然母质和制造业、建筑业的混合源(贡献率41.8%)。严格限制含硫肥料和杀虫剂在农业活动中的使用是防止盐城市大气硫污染进一步加剧的重要途径。The sulfur content in epilithic mosses can reflect the atmospheric sulfur deposition in a certain area.In this study,57 Haplocladium microphyllum samples were surveyed to evaluate the atmospheric sulfur pollution in Yancheng.The content and contamination factor spatial distribution of sulfur in mosses were measured,and the possible pollution sources of sulfur were identified.The sulfur mass fraction in mosses varied from 0.08%to 0.20%,showing a gradual increasing trend from northeast to southwest,and the highest level occurred at Lixiahe Economic Development Zone in southwest Yancheng,indicating that the application of agricultural fertilizers and pesticides had injected high sulfur into the atmosphere.The evaluation result of contamination factors showed that,on the whole,the level of atmospheric sulfur pollution in Yancheng belonged to suspected contamination.71.93%of the moss samples were graded as suspected contamination,while the remaining 28.07%slight contamination,of which most samples were distributed in the southwest.The sulfur of mosses in Yancheng was mainly from agricultural activities with contribution efficiency of 57.6%,secondly from the mixed source of natural source,manufacturing and construction with contribution efficiency of 41.8%.This study implied that the corresponding measures limiting strictly the use of fertilizers and pesticides containing sulfur in agricultural activities should be adopted for preventing the further aggravation of atmospheric sulfur pollution in Yancheng.

关 键 词：盐城市 细叶小羽藓 大气硫沉降 源解析 正定矩阵因子分解模型 

分 类 号：X835[环境科学与工程—环境工程] X51