水土保持研究2025，Vol.32Issue(4)：76-83,8.DOI:10.13869/j.cnki.rswc.2025.04.026
林下黄精种植对水土及氮、磷流失的影响
Impacts of under-forest Polygonatum kingianum planting on water,soil,nitrogen,and phosphorus losses
摘要
Abstract
[Objective]The study aims to reveal the impacts of planting Polygonatum kingianum Collett&Hemsl(P.kingianum)under forest,to clarify the relationships between rainfall,slope and runoff,sediment yield,and nitrogen and phosphorus loss,and to provide theoretical basis for the assessment and control of water,soil,nitrogen,and phosphorus losses in under-forest traditional Chinese medicinal herb planting models.[Methods]The study was conducted in the P.kingianum cultivation forest in Xundian County,Yunnan Province.The characteristics of water,soil,nitrogen,and phosphorus losses at different slopes(5°,10°,15°)under natural rainfall conditions were analyzed using in-situ observation of field runoff.[Results]The average runoff and sediment yield of P.kingianum cultivation forest were 164.44%and 251.16%higher than those in the natural forests,respectively,and increased with slope.The annual average losses of TN,TP,NH4+-N,and NO3--N in P.kingianum cultivation forest were 2.85,1.75,4.71,and 2.31 times higher than those in the natural forests,respectively.The main pathways for TN and TP losses were erosion and sedimentation,while the main pathway for NH4+-N and NO3--N losses was surface runoff.There was a highly significant positive correlation between rainfall and runoff,sediment yield,and nitrogen and phosphorus loss.[Conclusion]The planting of P.kingianum significantly increases the amount of water,soil,nitrogen,and phosphorus losses in the forest.Rainfall is the main factor affecting the runoff and nitrogen and phosphorus loss in P.kingianum cultivation forest.However,the sediment yield in P.kingianum cultivation forest is much lower than the tolerable soil loss in southwestern rocky mountainous areas.关键词
林下种植/黄精/水土流失/氮磷流失Key words
under-forest planting/Polygonatum kingianum/water and soil loss/nitrogen and phosphorus loss分类
农业科学引用本文复制引用
晏慧颖,黎建强,杨舒媛,赵思倩,刘方严,刘艳娇,汤汶奇..林下黄精种植对水土及氮、磷流失的影响[J].水土保持研究,2025,32(4):76-83,8.基金项目
昆明市科技"揭榜挂帅制"项目(2021-J-H-002-02) （2021-J-H-002-02）
云南省"兴滇英才支持计划"青年人才专项(XDYC-QNRC-2022-0205) （XDYC-QNRC-2022-0205）
云南省科技特派团创新引导与科技型企业培育计划项目(202204BI090003) （202204BI090003）
国家自然科学基金(32060345) （32060345）
