Interception of sulfate deposition from a closed canopy to a forest gap edge canopy in a subalpine dragon spruce plantation

作     者：ZHANG Yu WU Fu-zhong TAN Bo XU Zhen-feng LI Han LIU Jun-cheng ZHAO Hai-rong TAN Si-yi YOU Cheng-ming YANG Wan-qin 

作者机构：Long-term Research Station of Alpine Forest EcosystemsKey Laboratory of Ecological Forestry EngineeringInstitute of Ecology and ForestrySichuan Agricultural UniversityChengdu 611130China School of Life ScienceTaizhou UniversityTaizhou 318000China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2019年第16卷第12期

页      面：2856-2866页

核心收录：

学科分类：0709[理学-地质学] 0819[工学-矿业工程] 08[工学] 0303[法学-社会学] 0829[工学-林业工程] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 0705[理学-地理学] 0815[工学-水利工程] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0813[工学-建筑学] 0704[理学-天文学] 0833[工学-城乡规划学] 0713[理学-生态学] 0834[工学-风景园林学（可授工学、农学学位）] 

基　　金：funded by the National Key R&D Program of China (Grant No. 2017YFC0503906) the Nation Nature Science Foundation of China (Grant Nos. 31570445, 31622018, 31670526 and 31901295) the Sichuan Province and Technology Project for Youth Innovation Team (Grant No. 2017TD0022) 

主　　题：Canopy interception Sulfate ion Throughfall Gap edge Closed canopy Picea asperata 

摘      要：Reducing the threats of sulfate ion(SO42-)deposition to terrestrial ecosystems is a great challenge.The canopy interception effect on SO42-deposition has been well documented,but the interception efficiency of the gap edge remains unknown.Therefore,a subalpine dragon spruce(Picea asperata)plantation was evaluated in the upper reaches of the Yangtze River.The dynamics of the SO42-concentration in the throughfall were investigated from the gap edge to the closed canopy during the rainfall and snowfall periods from August 2015 to July 2016.The annual input of SO42-totaled 2.56 kg/ha through rainfall and 0.69 kg/ha through snowfall.The total annual net interception fluxes(NIFs)of SO42-at the gap edge and in the closed canopy were 1.48 kg/ha and 0.66 kg/ha,respectively,and the net interception ratios(NIRs)accounted for 45.40%and 20.25%,respectively.The NIF and the NIR of SO42-at the gap edge were higher than those in the closed canopy.Therefore,the results suggested that a significant amount of SO42-deposition was intercepted by the tree canopy in the subalpine plantation,with more SO42-deposition at the gap edge than in the closed canopy,which is beneficial for improving the water quality in the upper reaches of the Yangtze River via forest management.