南京林业大学学报（自然科学版）2026，Vol.50Issue(2)：187-195,9.DOI:10.12302/j.issn.1000-2006.202408018
修枝和间伐对长白落叶松人工幼龄林下草本植物多样性和土壤理化性质的短期影响
The short-term effects of pruning and thinning on the diversity of herbaceous plants and soil physicochemical properties under the artificial Larix olgensis young forest
摘要
Abstract
[Objective]This study aims to explore the effects of single pruning and combined pruning-thinning treatments on understory herbaceous plant diversity and soil physicochemical properties in young larch(Larix olgensis)plantations,providing theoretical and technical foundations for sustainable management of larch plantations.[Method]Utilizing a 17-year-old L.olgensis plantation established in August 2019,three treatments were designed:pruning+thinning,pruning only,and an untreated control.Surveys of understory herbaceous plants and soil were conducted 2 and 4 years after treatment.Changes and correlations among herbaceous plant diversity and soil nutrients under different treatments were analyzed to clarify the relationships between the two silvicultural methods,herbaceous plant diversity,and soil physicochemical properties.[Result]Silvicultural treatments showed signifcant effects on herbaceous plant diversity and soil physicochemical properties.Specifically,both pruning-only and pruning+thinning treatments significantly increased species richness and cover of understory herbaceous plants in the short term.Pruning+thinning had a greater impact on soil bulk density and compactness.Compared to the control,soil bulk density decreased by 10.4%((0,10]cm),10.2%((10,20]cm),and 8.9%((20,40]cm);in the(0,10]cm soil layer,pruning+thinning increased total nitrogen by 38.9%,hydrolyzable nitrogen by 34.8%,available potassium by 53.0%,and organic carbon by 84.6%(P＜0.05).Pruning-only primarily affected the(10,20]cm soil layer,increasing hydrolyzable nitrogen by 30.2%,available phosphorus by 14.4%,and organic carbon by 42.2%(P＜0.05);herbaceous plant diversity showed significant correlations with soil organic carbon,nitrogen,and potassium(P＜0.05).Increased species richness and cover enhanced soil carbon and nitrogen sequestration significantly.[Conclusion]The combined pruning+thinning treatment more effectively improved herbaceous plant richness and cover.Both pruning and thinning directly enhanced understory plant diversity and cover,indirectly promoting soil nutrient cycling.For young Larix olgensis plantations,combined pruning+thinning optimizes light conditions,fosters understory herbaceous diversity and growth,accelerates soil nutrient cycling,and helps maintain soil fertility while preventing siol degradation.关键词
修枝/间伐/林下草本/植物多样性/土壤理化性质/长白落叶松人工林Key words
pruning/thinning/understory vegetation plant diversity/soil physicochemical property/artificial of Larix olgensis分类
农业科技引用本文复制引用
杨贺,刘盛,李国伟,刘东洋,李依桐,王斌..修枝和间伐对长白落叶松人工幼龄林下草本植物多样性和土壤理化性质的短期影响[J].南京林业大学学报（自然科学版）,2026,50(2):187-195,9.基金项目
国家重点研发计划(2023YFD2200802). （2023YFD2200802）
