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森林病虫害经济损失评估的一种新方法——曲线法

作  者:
常国彬;谭成春;邢渤庶;梁洪勇
单  位:
葫芦岛市连山区林业局;辽中县林业局;国家林业局森林病虫害防治总站
关键词:
森林病虫害;经济损失评估;曲线法
摘  要:
森林病虫害通过危害林木的根、干、枝、叶等组织,使林分蓄积量或生物量遭受损失,从而影响森林生态系统服务功能作用的发挥。本文采用林木生长曲线法估算不同林龄林分蓄积量,通过森林生物量转换因子连续函数法(BEF)实现林分蓄积量与生物量的转换。编制了我国主要森林病虫害危害程度分级表、林分蓄积量年生长损失率表和主要林木生物量转换因子基本常数表,并以马尾松为例拟合出林分蓄积量单木生长曲线。确定了我国森林单位重量生物量生态效益值(K)为1 476.2元/t。应用林木生长曲线法和生物量转换因子连续函数法评估森林病虫害经济损失适用性强,准确度高,更能反映我国森林病虫害危害程度的实际状况。
译  名:
A new method of economic loss evaluation on forest pests
作  者:
CHANG Guo-bin,et al.(General Station of Forest Pest Management,State Forestry Administration,Shenyang 110034,China)
关键词:
forest pest;economic loss;curve evaluation method
摘  要:
The forest pests hurt the tissues of trees(roots,stems,branches,leaves etc.),resulting in the loss of wood store and biomass,and thus influenced the service function of forest ecosystem.The method of wood growth curve was used to evaluate the store of woods at different age and different phase,the conversion between the store and biomass was expressed by BEF(Biomass Expansion Factor).In order to analyze the dynamic wood store at different age and different phases,3 diagrams(the harm grade,the annual loss ratio of wood store caused by the major pests in China and the basic constants of biomass expansion factor of major species)were made.Based on Pinus massoniana,1 curve model of wood growth,3 formulas of direct economic loss and 2 formulas of indirect economic losses were drawn up,which indicated that the ecological value of biomass was 1 476.2 Yuan/t.The methods of loss evaluation were applicable and precise and could reflect the real situation of forest pests in China.

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