Study on Biomass and Productivity of Eucalyptus and China Fir Mixed Forest at Different Ages
[Objective]To reveal the biomass allocation and productivity characteristics of mixed eucalyptus and China fir forests of different ages,and provide theoretical basis for the afforestation model of eucalyptus in the south.[Method]Different ages forests(2-year-old,4-year-old,and 6-year-old)of eucalyptus and China fir mixed forests and 6a eucalyptus pure forests in Huanjiang county,Guangxi were selected as the objects.The significance of differences in stand growth,biomass,and productivity were analyzed by using typical sampling method and one-way ANOVA.[Result]The biomass of the tree layer in 2-year-old,4-year-old,and 6-year-old mixed forests were 9.56,28.57,and 69.46 t/hm2,respectively.The biomass distribution of tree layer in different forest ages was:trunk>root>branch>leaf.The shrub layer accounted for the highest proportion of understory vegetation biomass at different ages,and the stand biomass showed the following order:shrub layer>litter>herb layer.There were significant differences in biomass among the components of mixed forest ecosystem at different ages,and the biomass of mixed forest increased with the increase of forest age.The biomass of tree layer was the main part of stand ecosystem biomass,and the productivity of tree layer was the highest in different forest age ecosystems.[Conclusion]The ecological complementary advantage of mixed forest significantly improved the productivity of stand ecosystem,and the 6-year-old mixed forest of eucalyptus and China fir lanceolata could maximize the economic benefits of wood resources.
NETL
NSTL
万方数据
