森林与环境学报2025，Vol.45Issue(4)：403-412,10.DOI:10.13324/j.cnki.jfcf.202501023
低效毛竹林补植金钱松对水源涵养功能的影响
Effects of complementary planting of Pseudolarix amabilis on water conservation capacity in low-efficiency Phyllostachys edulis forests
摘要
Abstract
This study investigates the long-term mechanisms by which thinning and complementary planting measures enhance the hydrological regulation function of low-efficiency pure Phyllostachys edulis forests.By quantitatively analyzing the spatiotemporal variations in water retention capacities of water-holding components across different restoration periods(5 years and 20 years),this study aims to reveal the evolutionary patterns of forest water conservation capacity during vegetation restoration and identify its key driving factors.The study was conducted in typical low-efficiency P.edulis forests in northern Zhejiang Province,with three experimental stands established:unmodified low-efficiency stands(CK),early-stage transformation stands(ET)subjected to thinning and complementary planting of Pseudolarix amabilis for 5 years,and long-term transformation stands(LT)restored for 20 years.A stratified measurement approach was employed to systematically monitor canopy interception,understory vegetation water retention,litter layer water retention,and soil water storage.Repeated-measures ANOVA was performed to assess interactions between restoration duration and seasonal factors,while structural equation modeling(SEM)was adopted to elucidate the pathways through which soil physical properties influenced hydrological functions.Key findings were introduced as follows:(1)Forest transformation significantly altered hydrological allocation patterns.Compared with CK,LT exhibited an increase of 19.89%in total water retention capacity,with soil layers contributing 89.18%-97.53%,while no significant difference was observed between ET and CK.(2)Water-holding components presented heterogeneous responses to restoration duration.Compared with CK,ET showed a reduction of 66.84%in canopy interception but increases of 57.60%,4.40%,and 4.40%in understory vegetation,litter layer,and soil water retention,respectively.LT demonstrated increases of 78.76%,19.44%,and 15.30%in canopy interception,litter layer,and soil water retention,respectively,yet a decline of 1.72%in understory vegetation retention.(3)Soil total porosity explained 95.8%of the variance in water conservation capacity,playing a critical role in water storage and release.In early restoration stages,reduced canopy interception diminishes the overall impact on water conservation,whereas long-term restoration significantly improves water conservation capacity by enhancing canopy interception and soil water storage.关键词
低效毛竹林/金钱松/林分改造/水源涵养/时空动态Key words
low-efficiency Phyllostachys edulis forests/Pseudolarix amabilis/stand transformation/water conservation/spatiotemporal dynamics分类
林学引用本文复制引用
陈俊昊,吕杨,杨来邦,严一博,李同欣,王懿祥..低效毛竹林补植金钱松对水源涵养功能的影响[J].森林与环境学报,2025,45(4):403-412,10.基金项目
"十四五"国家重点研发计划"南方典型次生林全周期多功能经营技术"(2022YFD2200504). （2022YFD2200504）
