林业碳汇对人工林最优轮伐期的影响——以杉木和落叶松为例  

Effects of forest carbon sequestration on optimal rotation of plantations:a case study of Chinese fir and larch

作　　者：储安婷 宁卓 杨红强[1,2] CHU Anting;NING Zhuo;YANG Hongqiang(College of Economics and Management,Nanjing Forestry University,Research Center for Economics and Trade in Forest Products,NFGA,Nanjing 210037,China;Research Center for the Yangtze River Delta􀆳s Socioeconomic Development,Nanjing University,Nanjing 210093,China)

机构地区：[1]南京林业大学经济管理学院,国家林业与草原局林产品经济贸易研究中心,江苏南京210037 [2]南京大学长江三角洲经济社会发展研究中心,江苏南京210093

出　　处：《南京林业大学学报（自然科学版）》2023年第3期225-233,共9页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：国家自然科学基金面上项目(72073064);国家自然科学基金青年科学基金项目(71703069);江苏省“333高层次人才培养工程”项目(BRA2018070)。

摘　　要：【目的】在我国禁伐天然林的背景下,人工林的碳汇功能因为减缓气候变化方面的重要作用而备受关注。分析林业碳汇对我国人工林最优轮伐期的影响,为人工林碳汇经营的管理决策提供理论基础。【方法】以我国南方林区的杉木人工林和北方林区的落叶松人工林为研究对象,基于修正的Faustmann-Hartman模型,借助林木的生长模型和林业碳汇供给的计算模型,计算并比较不同经营目标下人工林的最优轮伐期和林地期望值。【结果】(1)无论树种和立地条件,将碳汇收益纳入经营目标都会增加林地期望值;(2)在碳价为35元/t、利率为5%时,将碳汇收益纳入林地经营目标,最优轮伐期有小于1 a的延长;只考虑碳汇收益时,人工林的碳汇收益随轮伐期的延长而增大;(3)碳价格在0~125元/t范围内变动时,杉木最优轮伐期有2~3 a的变动,落叶松最优轮伐期基本没有变化,最大林地期望值的变动均不明显。【结论】开展人工林的碳汇经营有利于林地投资。现有的经营强度和碳价格下,由于碳价格远远低于木材价格,将碳汇收益纳入林地经营目标时,林地经营者考虑的最优轮伐期不会有很大变化;只考虑碳汇收益时,以不砍伐森林的收益最大。碳价格在较低水平变动时,对人工林最优轮伐期的影响不显著。【Objective】In the context of China􀆳s natural forest logging ban,the carbon sequestration function of planted forests plays an important role in mitigating climate change.This study therefore aimed to analyze the impact of forestry carbon sequestration on the optimal rotation age of plantations in China and to provide a theoretical basis for management strategies of carbon sequestration in plantations.【Method】Taking the Cunninghamia lanceolata(Chinese fir)plantation in the southern forest area and the(Larix spp.)(larch)plantation in the northern forest area as examples,the revised Faustmann⁃Hartman model was used as the theoretical basis.The forest growth model and formula of forestry carbon sequestration supply were used to calculate the optimal rotation age and expected values,before comparing the differences.【Result】(1)Regardless of the tree species and site conditions,inclusion of carbon sequestration income into the management target increased the expected value of forestland.(2)When the carbon price was 35 yuan/t with an interest rate of 5%,the carbon sequestration income was included in the forest land management target,with the optimal rotation age extended by less than one year.When the only carbon sequestration income was considered,the income of the forest carbon increased alongside the extension of the rotation age.(3)When the carbon price fluctuated within the range of 0-125 yuan/t,the optimal rotation age of Chinese fir changed by 2-3 years,the optimal rotation age of larch remained unchanged,whilst there was no obvious change in the expected maximum forest land value.【Conclusion】(1)Carbon sequestration management of plantations was beneficial for the forest land investment.(2)Under the current management intensity and carbon price,the carbon prices are much lower than wood prices,and hence,when the carbon sequestration income is included in the forestland management target,the management strategy would not change significantly.On considering only the benefits of the carbon seque

关 键 词：林业碳汇 人工林 最优轮伐期 森林管理 Faustmann公式 

分 类 号：S757[农业科学—森林经理学]