摘要
【目的】最适主伐年龄是依据不同的森林培育目标来确定合理采伐量、调整经营措施以及规划设计必不可缺的林业指标,对树种培育实现永续利用有重要的影响。探究基于建筑材目的油松Pinus tabulaeformis人工林的最适主伐龄,旨在为森林的可持续经营提供科学依据,并且对油松建筑材林高效培育和经济收益获得具有重要意义。【方法】以河北平泉阴坡厚土油松人工林为研究对象,先通过对比其他针叶建筑材树种材性指标,确定油松作为建筑材林培育的可行性。其次根据基本调查数据及当地造林资料,测定油松建筑材林材性指标,结合建筑材材种规格得出的不同径级木材出材量和出材率,考虑两者得到工艺成熟龄;测定经济指标,当投资收益最大化对应的年龄为经济成熟龄;测定材积生长量指标,连年生长量和平均生长量曲线相交对应的年龄为数量成熟龄,综合三者得出最适主伐年龄。【结果】1)培育油松建筑材林初植密度宜小,控制在2500株/hm^2以下,在主伐前配合修枝措施、合理间伐以促进油松建筑材林的高效培育。2)培育中径级油松建筑材林的工艺成熟龄为47 a,培育大径级油松建筑材林的工艺成熟龄为50 a;经济成熟龄为47 a,数量成熟龄为35 a。【结论】油松作为建筑材林培育具有一定的可行性。阴坡厚土上培育油松中径级建筑材的最适主伐年龄为47 a;培育大径级建筑材的最适主伐年龄为50 a,可适当延迟3~5 a,以获得较高品质的大径级建筑材。
【Objective】The optimal cutting age is a forestry indicator that is indispensable for determining reasonable harvesting volume,adjusting management measures,and planning and design according to different forest cultivation goals,and has an important impact on the sustainable use of tree species cultivation.Therefore,exploring the optimal cutting age of Pinus tabulaeformis plantation based on building timber not only provides a scientific basis for sustainable forest management,but also has important significance for the efficient cultivation of economical forest trees and economic returns.【Method】Taking the Pinus tabulaeformis plantation in thick soil on shady slope of Pingquan,Hebei Province as the research object,the feasibility of Pinus tabulaeformis as a building timber plantation was determined by comparing the material indexes of other coniferous building lumber firstly.Secondly,according to the basic survey data combined with local afforestation datum,measured the index values of Pinus tabulaeformis building timber plantation,and combined the output and rate of different diameters based on the specifications of the building timber species.Consider the above two to obtain the technological maturity age.The economical maturity age was determined when the investment income was maximized corresponding to measure the economical indicators.The volume growth indicator was measured,the quantitative maturity age at which the annual increment curve and the average increment curve intersect corresponds to the age.Finally,combined the above three to obtain the optimal cutting age.【Result】1)The planting density of Pinus tabulaeformis should be small,controlled at 2,500 plants per hectare.The pruning measures should be carried out before the main cutting,then reasonable thinning in order to promote the efficient cultivation of Pinus tabulaeformis.2)The technological maturity age of the medium-diameter Pinus tabulaeformis plantation is 47 years,and the large-diameter Pinus tabulaeformis is 50 years.The economi
作者
贾茜
王清春
贾忠奎
于青军
迟明峰
张龙玉
吴丹妮
马履一
JIA Xi;WANG Qingchun;JIA Zhongkui;YU Qingjun;CHI Mingfeng;ZHANG Longyu;WU Danni;MA Lyuyi(College of Forestry,Beijing 100083,China;Engineering Technology Research Center of Pinus tabulaeformis of National Forestry&Grassland Administration,Beijing 100083,China;College of Ecology&Nature Protection,Beijing Forestry University,Beijing 100083,China;Huangtuliangzi State-owned Forest Farm,Pingquan 067506,Hebei,China)
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2020年第8期45-52,共8页
Journal of Central South University of Forestry & Technology
基金
“十三五”国家重点研发计划项目“油松速生建筑材林高效培育技术研究”(2017YFD0600501)。
关键词
建筑材
油松
主伐龄
河北
building timber
Pinus tabulaeformis
cutting age
Hebei province
