摘要
森林蓄积是森林生物量的主要组成部分,是各类森林资源监测的重要指标,为了准确估算塞罕坝地区云杉蓄积量,指导该地区云杉林的经营,本研究基于塞罕坝地区云杉样木实测数据,建立了该地区云杉林的二元材积模型和一元材积模型,根据以上2个模型构建了塞罕坝地区云杉林的二元立木材积表和一元立木材积表,并分析了经营措施对云杉林高径比的影响,比较了2个立木材积表的适用性,得出以下结论:(1)云杉林的高径比随抚育强度的增加而降低,随密度的增加而增加;(2)塞罕坝云杉林最优的二元、一元材积模型分别为V=0.00008506D 1.969 H 0.684,V=0.000140D 2.400;(3)应用t检验证明在塞罕坝地区,以上2个材积模型建立的材积表均有良好的适用性;(4)一元材积表计算出的未抚育林分蓄积量比二元材积表偏低,而抚育后计算出的云杉林蓄积量则略高于二元材积表的计算结果。
Forest volume was a major component of forest biomass and an important monitoring index of forest resources.In order to estimate the spruce stand volume accurately,and guide the management activities of spruce in the Saihanba Mechanized forestry Farm,a two-variable stand volume model and a one-variable stand volume model for spruce forests were established based on the measured data of sample trees.Based on the above two models,the two-variable stand volume table and the one-variable stand volume table of spruce were constructed in the area.The effects of management measures on the height-diameter ratio of spruce were analyzed,and the applicability of the two stand volume tables were compared.The results showed that:(1)The height-diameter ratio of spruce decreased with the increase of tending intensity and increased with the increase of stand density.(2)The two-variable and one-variable stand volume models for spruce were V=0.00008506 D 1.969 H 0.684,and V=0.000140 D 2.400,respectively.(3)The t-test results showed that the volume tables established by the two models had good applicability in the Saihanba area.(4)The volume calculated by one-variable volume table was lower than that by the two-variable stand volume table in untended stand,while the stand volume of tended stand was higher when calculated by one-variable volume table.
作者
付立华
张菲
张岩
吴梦宇
程顺
许中旗
FU Lihua;ZHANG Fei;ZHANG Yan;WU Mengyu;CHENG Shun;XU Zhongqi(Saihanba Mechanized Forestry Center of Hebei Province,Weichang 068466,China;College of Forestry,Hebei Agricultural University,Baoding 071000,China)
出处
《林业与生态科学》
2023年第3期275-281,共7页
Forestry and Ecological Sciences
基金
承德国家可持续发展议程创新示范区建设科技专项项目(202008F025)。
关键词
塞罕坝地区
云杉
立木材积表
间伐
Saihanba area
spruce
volume table of living tree
thinning
