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采用平均标准木法对五倍子蚜虫夏寄主主要树种盐肤木和红麸杨人工幼龄林的生物量及其分配进行了测定和研究 .根据 2 2株不同径级标准木的实测数据 ,建立了测算盐肤木和红麸杨 2树种各器官生物量的回归方程 (w =aDb,w=a(D2 H) b) .各方程的相关系数均达极显著水平 (r值在 0 .970 0～ 0 .9982之间 ) ,估测精度和置信度高 (标准回归误差在 0 .0 195～ 0 .0 5 13之间 ) ,具有实用价值 .研究结果表明 ,3年龄的倍蚜虫夏寄主林现存总生物量可达 15 40 .6g/m2 ,其中 ,乔木层和林下植物的生物量以及凋落物量分别为 12 91.0g/m2 ,15 7.0g/m2 ,92 .6g/m2 .两种夏寄主树的生物量在各器官中的分配比率依次是主茎 (5 0 .7% ) >叶片 (2 0 .9% ) >根系 (14.9% ) >枝条 (13.5 % ) .
The average standard wood method was used to measure and study the biomass and distribution of Artemisia sphaerocephala chinensis and Artemisia mandshurica young seedlings in achilles mykiss.According to the measured data of 22 different size classes of standard wood, The regression equation (w = aDb, w = a (D2H) b) was calculated for the biomass of different organs of Rhus typhina and the two varieties of red bran.With the correlation coefficient of each equation reaching the extremely significant level (r = 0.970 ~ 0.9982), with high estimation accuracy and high confidence (the standard regression error is between 0 .0 195 ~ 0 .0 5 13), and has practical value. The results show that the 3-year-old double aphid summer host forest The existing total biomass can reach 15 40.6 g / m2, of which the biomass and litter amount of tree layer and undergrowth are 12 91.0g / m2, 15 7.0g / m2 and 92.6g / m2 respectively. The biomass of the host tree in the order of main stem (50.7%) leaves (20.9%) roots (14.9%) branches (13.5%).