文献类型：期刊文献

中文题名：北亚热带3种典型森林群落对降水中氮、磷、硫的截留及分配特征

英文题名：Interception characteristics of nitrogen,phosphorus and sulfur in precipitation by three forest communities in northern subtropical region of China

作者：康希睿[1] 张涵丹[1] 王小明[1] 陈光才[1]

第一作者：康希睿

机构：[1]中国林业科学研究院亚热带林业研究所,杭州311400

年份：2020

卷号：40

期号：19

起止页码：6958-6968

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家重点研发计划项目(2017YFC050550403);中央级公益性科研院所基金重点项目(CAFYBB2017ZA002?2);国家自然科学基金项目(41807151)。

语种：中文

中文关键词：毛竹林;杉木林;青冈阔叶林;沉降;截留

外文关键词：Phyllostachys pubescens;Cunninghamia lanceolata;Cyclobalanopsis glauca broadleaf forest;deposition;interception

分类号：S718.54

摘要：森林群落在净化空气、截留沉降污染物、改善地表水质等方面具有重要作用。本研究以北亚热带地区3种典型森林群落(毛竹林、杉木林、青冈阔叶林)为研究对象,通过分析沉降污染物(NH4^+?N、NO3^-?N、NO2^-?N、TP和SO4^2-)在大气降水、林内穿透雨、树干茎流、枯透水和地表径流中的浓度和通量变化特征,探讨不同森林群落对氮、磷、硫的截留净化作用和分配特征。结果表明,该区域大气降水中NH4^+?N、NO3^-?N、NO2^-?N、TP和SO4^2-年均浓度分别为1.06、0.61、0.04、0.07、1.84 mg/L,其年均pH为5.88;各森林群落林冠层能够调升降雨的pH且全年稳定,对TP和NH4^+?N均有吸附作用,截留率分别为79.09%—84.68%和30.88%—69.36%;而枯落物层则是林下氮、磷、硫的主要释放源,对NH4^+?N、NO3^-?N、TP和SO4^2-均具有淋溶作用;此外,由地表径流(输出)与大气降水(输入)的对比分析可知,各林地对沉降污染物中氮、磷、硫的截留率均超过98%;3种森林群落对沉降污染物中氮、磷、硫的截留能力依次为:青冈阔叶林>毛竹林>杉木林,阔叶林对沉降污染物的净化能力要高于毛竹林及针叶的杉木林。
In the present study,Phyllostachys pubescens plantation,Cunninghamia lanceolata plantation,and Cyclobalanopsis glauca broadleaf forest,three typical forest types in northern subtropical China,were selected to investigate the fate and transport processes of inorganic nitrogen(NH4^+?N,NO3^-?N,NO2^-?N),TP,and SO4^2-in various hydrological components(i.e.precipitation,throughfall,stemflow,litterfall,and surface runoff).Results showed that the average concentrations of NH4^+?N,NO3^-?N,NO2^-?N,TP,and SO4^2-in rainfall were 1.06,0.61,0.04,0.07 and 1.84 mg/L,respectively,with an average pH of 5.88.The canopies of the three forest communities increased the pH of precipitation and kept stable throughout the year.The canopies absorbed TP and NH4^+?N accounting for 79.09%—84.68%and 30.88%—69.36%,respectively in P.pubescens,C.lanceolata and C.glauca forests.The litter layer was the major releasing sources of nitrogen,phosphorus,and sulfur under the forests.Compared with atmospheric precipitation,the mass flux of NH4^+?N,NO3^-?N,NO2^-?N,TP,and SO4^2-in surface runoff decreased significantly,with a minimum of 98%being trapped.According to the total interception rates of three forest communities,the C.glauca broadleaf forest most effectively trapped nitrogen,phosphorus,and sulfur in atmospheric precipitation,followed by P.pubescens plantation and C.lanceolata plantation.