【作者】 秀英；

【导师】 岳永杰；

【作者基本信息】 内蒙古农业大学 ， 林业硕士（专业学位）， 2023， 硕士

【摘要】 森林资源在陆地生态系统中具有巨大的碳储存能力。随着工业化急剧发展,人类对自然资源的需求日益增长,导致向大气中的排放的CO₂相应增多,全球气候发生变化,温室效应不断增强,成为了全球生态可持续发展和国际经济社会共同面临的严峻挑战。因此,森林生物量、碳储量估算是全球碳循环研究中的关键参数,对森林碳汇的探讨有着长远的意义。本文以察哈尔右翼中旗那日斯太林场乔木林为研究对象,以那日斯太林场的2017年森林资源二类调查数据为基础,分析那日斯太林场森林资源的分布,用IPCC计量参数法计算生物量,并对那日斯太林场不同树种、不同起源、不同林龄和不同林种的碳储量和碳密度进行计算和现状分析,为该林场森林储碳能力提供重要的依据,为当地森林固碳及增汇提供了有利的数据支持。研究结果如下:（1）通过对那日斯太林场森林资源现状分析,发现以天然次生的白桦优势树种最显著,并分别分析了树种组成、林分起源、龄组结构、林种结构的蓄积量和面积。其中,有林地面积为5564.23 hm²、占林地面积19.12%;树种组成以白桦和落叶松为主,白桦和落叶松面积之和占乔木林总面积的97.19%;在不同林龄的面积中,中龄林面积最大,占总面积的67.77%;天然次生林面积占较大,占乔木林面积80.51%,人工林面积仅占乔木林的19.49%;灌木林面积为11297.75 hm²,占林地总面积为38.82%。（2）结果发现乔木林生物量最大为大南沟林区,乔木林生物量最小为石烂林区,分别为48103.29 t及10162.63 t。乔木林树种中白桦的生物量最大,值为135102.78 t;其次为落叶松生物量,值为38459.73 t。（3）该林场碳储量和碳密度,结果表明,按林区划分大南沟林区碳储量最大,为24302.85 t,石烂林区碳储量最少,为5200.00 t。按树种结构分析那日斯太林场白桦和落叶松两个主要树种的碳储量,占乔木林总碳储量的97.51%,白桦碳密度为15.23 t/hm²;落叶松碳密度为20.74 t/hm²;按不同起源那日斯太林场以天然林为主体,占有林地总面积的80.51%,碳储量占乔木林总碳储量的75.76%;按林种结构以水土保持林为主,水土保持林占乔木林总碳储量的77.08%;按林龄以白桦林中龄林为主,占乔木林优势树种总面积的67.66%,碳储量占乔木林优势树种总碳储量的67.66%。整体上,各乔木林碳密度随树种林龄增大而增大。其中,落叶松成熟林碳密度为最高、樟子松幼龄林最低。幼龄林过渡到中龄林及中龄林过渡到近熟林阶段乔木林树种多,碳密度涨幅最大,而中龄林碳储量最高,那日斯太林场乔木林具有较大碳汇潜力。更多还原

【Abstract】 Forest resources have great carbon storage capacity in terrestrial ecosystems.With the rapid development of industrialization,the increasing demand of human beings for natural resources has led to the corresponding increase of CO₂emissions to the atmosphere,the global climate has changed,and the greenhouse effect has been increasing,has become the global ecology sustainable development and the international economic society common faces the stern challenge.Therefore,the estimation of forest biomass and carbon stock is a key parameter in the study of global carbon cycle,which has a long-term significance for the study of forest carbon sink.The arbor forest of Narisitai Forest Farm in Chayouzhongqi was the research object of this study,based on the 2017 second-class survey data of forest resources,the distribution of forest resources in Narisitai forest farm was analyzed.,the biomass was calculated using the IPCC metrological parameter method.The carbon storage and carbon density were calculated and analyzed by different tree species,different origins,different ages and different species structure in Narisitai forest farm,which provided an important basis for the forest carbon storage capacity of this forest farm,and provides a favorable data base for forest carbon sequestration and carbon enhancement in this region The results are as follows:（1）Through the analysis of the results of the second-class survey of forest resources in Narisitai forest farm,it was found that the dominant species of Birch in the natural secondary forest were the most significant,and the tree species composition,the origin of the forest,the age group structure,the volume and area of the forest-type structure were analyzed respectively.Among them,the area of forest land was 5564.23 hm2;Accounted for 19.12%of forest area;The main tree species were Birch and Larch,and the total area of Birch and Larch accounted for 97.19%of the total area of arbor forest;In the area of different forest ages,the area of middle-aged forests was the largest and accounted for67.77%of the total area;The area of the natural secondary forest accounted for a large proportion,accounted for 80.51%of thel area of the arbor forest,the area of artificial forest was only 19.49%of forest area.The shrub area was 11297.75 hm2 and accounted for 38.82%of forest area.（2）Results found that the maximum biomass was Dannangou forest area and the minimum biomass was Shilan forest area,which were 48103.29t and 10162.63t respectively.The biomass of betula platyphylla was the highest among the tree species of arboreal forest,which was 135102.78t.The biomass of larch was followed by 38459.73t.（3）The results of carbon density and carbon storage in the forest farm showed that,according to the forest area,Dannangou forest area had the largest carbon storage（24,302.85 t）and Shilan forest area had the least carbon storage（5200.00 t）;According to the tree species structure,birch and larch were the main species in Narisitai forest farm,accounted for 97.51%of the total carbon storage of arbor forest,and the average carbon density of both was 17.99 t/hm2;According to different origins,natural forest was the main body of Narisitai forest farm,which occupied 80.51%of forest area,and carbon storage accounted for 75.76%of the total carbon storage of arbor forest;According to forest species structure,Soil and water conservation forest was the main forest,accounted for 77.08%of the total carbon storage;According to the age of the forest,the middle-aged birch forest was the main forest,accounting for 67.66%of the dominant tree species of arbor forest,and the carbon storage accounted for 67.66%of the total carbon storage of the dominant tree species.On the whole,the carbon density of each arbor forest increased with the age of tree species.Among them The carbon density was the highest in mature forest of Larch and the lowest in young forest of Pinus sylvestris.At the stage of young forest transiting to middle age forest and middle-age forest transiting to near mature forest,there were e more tree species in arbor forest,with the largest increased in carbon density,while the middle-age forest had the highest carbon storage.On that day,the arbor forest in Stellenchang Forest Farm has a large carbon sink potential Arbor forest in Narisitai forest farm had a large potential of carbon storage.更多还原