生态学报2026，Vol.46Issue(3)：1310-1323,14.DOI:10.20103/j.stxb.202501180161
黄土高原刺槐人工林各植被层生物量多因子响应与管理
Multifactor response and management of the biomass of various vegetation layers of Robinia pseudoacacia plantation in the Loess Plateau of China
摘要
Abstract
Based on the literature data of Robinia pseudoacacia plantation in the Loess Plateau,the response of biomass of tree layer,shrub layer,herb layer,and litter layer to main factors was analyzed by outsourced line analysis,and the appropriate control measures were determined to maintain the biomass of each layer at a high level.The results showed that:(1)The average biomass(t/hm2)in each layer on the Loess Plateau was as follows:tree layer(73.78)＞litter layer(6.43)＞shrub layer(2.91)＞herb layer(1.55),with the tree layer accounting for 87%of the total.(2)The biomass of each layer varies with changes in the main influencing factors as follows:the most important influencing factor for the tree layer was forest age,with biomass increasing rapidly with increasing forest age(0-20 years),slowing down(20-30 years),and stabilizes(＞30 years).Site index(10 m),canopy density(0.60),and stand density(1500 plant/hm2)served as turning points for biomass growth in this layer.The primary influencing factors for the shrub layer and herb layer were site index,stand density,and canopy density.Biomass in the shrub layer decreased gradually with increasing site index,while biomass in the herb layer followed a trend of rapid increase-slow increase-stabilization.Biomass in both the shrub and herb layers decreased significantly after exceeding 1700 plant/hm2 and maintained a high value at canopy density between 0.60 and 0.65.The main influencing factors for the litter layer were forest age,tree layer biomass,and canopy density.Biomass first increased rapidly with increasing forest age and tree layer biomass,then the rate of increase slows.Biomass exhibited a single-peak response with canopy density(peak at 0.60-0.70).(3)At canopy density levels of 0.60-0.65,biomass in all vegetation layers remained at relatively high levels(above 85%of the maximum value of the outer envelope).This study analyzed the response of biomass of each vegetation layer of Robinia pseudoacacia plantation in the Loess Plateau to the main factors for the first time,and proposed that the canopy density range of 0.60-0.65 should be maintained in the future management of Robinia pseudoacacia plantation to maintain the biomass of each layer at a high level,so as to provide support for guiding the construction of a reasonable tree-shrub-herb-litter composite structure,improving the stability of Robinia pseudoacacia forest ecosystem and ecological functions such as carbon sequestration,soil and water conservation and biodiversity protection.关键词
黄土高原/刺槐人工林/植被层生物量/立地因子/林分结构/郁闭度Key words
Loess Plateau/Robinia pseudoacacia plantation forests/biomass of vegetation layers/site factors/stand structure/canopy density引用本文复制引用
云慧雅,王冬梅,王彦辉,张莹莹,张梦棋,刘亚玲..黄土高原刺槐人工林各植被层生物量多因子响应与管理[J].生态学报,2026,46(3):1310-1323,14.基金项目
国家自然科学基金项目(U20A2085) （U20A2085）
国家重点研发计划项目(2022YFF1300404) （2022YFF1300404）
