间伐对长白落叶松人工林碳汇木材复合经济效益的影响  

Effects of thinning on the compound economic benefits of carbon and wood for planted Larix olgensis forests

作　　者：许欣野 董灵波[1] 陈冠谋 XU Xinye;DONG Lingbo;CHEN Guanmou(College of Forestry,Northeast Forestry University,Harbin 150000,Heilongjiang,China)

机构地区：[1]东北林业大学林学院,黑龙江哈尔滨150000

出　　处：《中南林业科技大学学报》2024年第9期201-210,共10页Journal of Central South University of Forestry & Technology

基　　金：国家自然科学基金面上项目(32171778)。

摘　　要：【目的】为量化不同间伐策略对长白落叶松人工林碳汇木材复合经营中木材产量、碳储量及其经济效益的综合影响。通过比较不同的管理方案,优化林业管理以增强其碳汇功能和木材产量,从而提升林地的总体经济价值。【方法】以帽儿山实验林场长白落叶松人工林为研究对象,以CO_(2)FIX模型为基础,结合气象数据、调查数据和文献数据,探讨由间伐起始期(11、13 a)、间隔期(5、8和10 a)和间伐强度(10%、20%和30%)组成的不同间伐方案(即起始期、间隔期、间伐强度)对长白落叶松人工林木材产量、碳储量、碳流通以及经济效益的影响。【结果】1)较早的间伐起始期有助于提升林分木材产量和碳储量,起始期11 a的林分比13 a的林分木材产量、碳储量增加了约6%和2%;轻度间伐优化碳汇,重度间伐则可提前获得经济效益,10%间伐强度下的林分木材产量、碳储量相较于间伐强度30%的增加了约28.9%和13.2%;而30%间伐强度下林分的经济效益比10%强度下林分增加了19.5%。短间伐间隔(5 a)在木材收获、提升碳汇能力和经济效益比较长的间伐间隔(10 a)增加了10%、5.3%和1.4%。2)当以碳汇和木材为经营目标时,方案A1(11 a,5 a,10%)的效果均为最佳,其木材蓄积、碳储量和经济效益分别为758.49 m^(3)/hm^(2)、124.28 Mg/hm^(2)、32.48万元;当以碳汇木材复合经营为目标时,方案D3(13 a,5 a,30%)效果最佳,其木材蓄积、碳储量分别比方案A1减少了187.8 m^(3)/hm^(2)、13.5 Mg/hm^(2),但经济效益却比A1方案高9.62万元。3)当以碳汇和木材为最优先考虑时,长白落叶松人工林每公顷储碳约246.11 Mg/hm^(2),49%的碳进入土壤碳库,51%的碳进入木材加工。一个轮伐期后,42%的碳进入大气,20%的碳由林产品分解释放,31%的碳留存于木材产品碳库,7%的碳仍存于土壤碳库。而当以碳汇木材复合经营为目标时,长白落叶松人工林每公顷储碳约246.21 Mg/【Objective】To quantify the comprehensive impact of different thinning strategies on the timber yield,carbon storage,and economic benefits in the composite management of Larix olgensis plantations.By comparing different management schemes,optimize forestry management to enhance its carbon sequestration function and timber production,thereby increasing the overall economic value of forest land.【Method】Taking the L.olgensis plantations in Maoershan Experimental Forest Farm as the subject,based on the CO_(2)FIX model,and incorporating meteorological data,survey data,and literature data,this study explored the effects of different thinning schemes:composed of starting periods(11 years,13 years),intervals(5 years,8 years,and 10 years),and thinning intensities(10%,20%,and 30%)[i.e.,[starting period,interval,thinning intensity]]—on the timber yield,carbon storage,carbon flux,and economic benefits of Larix olgensis plantations.【Result】(1)An earlier thinning starting period helped to increase the timber yield and carbon storage of stands,with stands starting at 11 years showing an approximate 6% and 2% increase in timber yield and carbon storage,respectively,compared to those starting at 13 years.Light thinning optimized carbon sequestration,while heavy thinning obtained economic benefits earlier,with stands under 10% thinning intensity showing about a 28.9% and 13.2% increase in timber yield and carbon storage,respectively,compared to those under 30% intensity;however,the economic benefits of stands under 30% intensity increased by 19.5% compared to those under 10% intensity.A short thinning interval(5 years)increased timber harvest,carbon sequestration capacity,and economic benefits by 10%,5.3%,and 1.4%,respectively,compared to a longer interval(10 years).(2)When carbon sequestration and timber were the management objectives,scheme A1[11 years,5 years,10%]performed the best,with timber volume,carbon storage,and economic benefits of 758.49 m^(3)/hm^(2),124.28 Mg C/hm^(2),and 324800 yuan,respectively;when aim

关 键 词：长白落叶松 CO_(2)FIX模型 间伐方案 经济效益 碳储量 木材产量 

分 类 号：S718.5[农业科学—林学]