不同密度长白落叶松林生物量与碳储量分布特征

通过对立地条件相近28年生的5种林分密度(780、920、1099、1190、1377株·hm-2)长白落叶松人工林标准地调查与生物量测定,探讨了不同林分密度长白落叶松人工林生物量与碳储量的分布特征.结果表明,林分密度对长白落叶松林平均单株木生物量、群落生物量及乔木层生物量均有显著影响.前者随林分密度的增加而下降,且下...

Biomass and carbon storage distribution of different density in Larix olgensis plantation

The distribution of biomass and carbon storage was studied in 28-year-old Larch olgensis plantations with similar site and 5 kinds of different densities(780,920,1 099,1 190,1 377 number · hm-2) in Lesser Khingan Mountains(Northeast of China) based on the survey of sample plots and biomass research materials.The main results are as follows:(1) The stand density affected the individual biomass,arbor biomass and community biomass significantly.The individual biomass decreased with the stand density increasing and varied less and less.And their relationship could be expressed by the equation Y=aXb.The arbor biomass and community biomass increased along with enlarging of the stand densities and varied less when the density increased to a value(1 190 number · hm-2).And their relationship with the density could be expressed by equation Y=a+bln(X).(2) The total carbon storage of community in unit area increasing steadily along with enlarging of the stand densities,in sequence of arbor,litters and underground vegetation.The arbor carbon storage in unit area is main component with ratio of 93.84%.As the stand densities increased,the litters carbon storage in unit area decreased firstly,then increased.For underground layer,the carbon storage changed in decreasing tendency.In conclusion,our study shows that stand density has a great influence on carbon storage and its allocation rules for L.olgensis plantations.