盐肤木和红麸杨人工幼龄林生物量的研究

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 22 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 = aD^b, w= a( D²H)^b) . 各方程的相关系数均达极显著水平( r 值在0.970 0~ 0.998 2 之间) , 估测精度和置信度高( 标准回归误差在0.019 5~ 0.051 3 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 1 540. 6 g/ m², 其中, 乔木层和林下植物的生物量以及凋落物量分别为 1 291. 0 g/ m², 157. 0 g/ m², 92. 6 g/ 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( 50.7%) > 叶片( 20.9%) > 根系( 14.9%) > 枝条( 13.5%) .

A Study on the Biomass of the Young Plantation of Rhus chinensis and R. punjabensis

The biomass and its allocation of the young plantation of Rhus chinensis and R. punjabensis was determined with the average standard tree method. According to the data From 22 standard trees of different basal diameter classes, the following regression equations to estimate the biomass of each organs for Rhus chinensis and R. punjabensis were described from single plant : W= aD^b, W= a( D²H )^b. With signi ficant correlation coefficients 0. 970 0~
0.998 2, small standard error 0.019 5~ 0.051 3, the equations had practical values. The results obtained showedthat the total biomass the gallaphid summer host plants stand in three- year old is 1 540. 6 g/m², among which thebiomasses of tree layer , understory layer and litterfall are 1 291.0 g/ m²
, 157.0 g/ m², 92. 6 g/m² respectively. Thebiomass components ratio of each organ is trunk ( 50.7%) > leave ( 20.9% ) > root ( 14.9%) > branch ( 13.5%) .