华北油松人工林单株林木的生物量

本文根据山西太岳林区和河北承德地区的31块标准地共220株标准木的资料分析了华北油松人工林单株林木的生物量与胸径、树高及林分密度之间的数量关系。分别编制了两地区油松单株林木的生物量表。

DETERMINATION OF THE BIOMASS OFINDIVIDUAL TREES IN STANDS OF PINUS TABULAEFORMIS PLANTATION IN NORTH CHINA

Data of 220 trees from 31 sample plots,laid out in Pinus Tabalaeformis plantation in Taiyue Mountain,Shanxi province and in Chengde,Hebei province,North China,were analyzed to find out the quantitative relation of the biomass of individual tree with the D.B.H.and height of the tree,and with the density of the stand.Biomasses of the stem,the branch,the leaf and the root of individual trees were found to decrease with the increase of stand density,and the regression of the D.B.H.and height with biomass was represented by the equation w=a (D2H)b.The precisions of the two biomass tables calculated from this equation are higher than 0.95 with a confidence 0.95