中文摘要：

小叶白蜡（Fraxinus sogdiana Bunge.）为奇数羽状复叶,常由5～13片小叶组成。通过取样测量,分析不同复叶构件生物量的可塑性及其构件生物量之间的关系。结果表明：小叶白蜡全部样本复叶生物量为0.146～1.663g,平均以7片小叶的最大,并显著高于其他复叶,以5片小叶的最小,并显著低于其他复叶;叶轴生物量为0.016～0.179 g,平均以13片小叶的最大并显著高于其他复叶,以5片小叶的最小并显著低于其他复叶;小叶生物量为0.006～0.886 g,平均以7片小叶的最大并显著高于其他复叶。不同复叶构件生物量具有较大的可塑性,其变异系数为22.8%～138%;对生左、右小叶的生物量分配具有对称性,顶小叶和相同叶序小叶生物量分配随小叶数增多依次减小。不同复叶构件生物量之间的关系既有直线函数的同速生长型,又有幂函数的异速生长型,各构件生物量在复叶生长过程中相对增长速度可通过相关方程的参数做具体描述。

英文摘要：

The compound leaf of Fraxinus sogdiana are imparipinnate,consists of 5-13 leaflets in common. By large sampling measurement,the relationship between the phenotypic plasticity on component biomass of different compound leaves of various number leaflets and the component biomass were analyzed. The results showed that compound leaves biomass of all samples of F. sogdiana were 0. 146-1. 663 g,the average biomass of compound leaves with 7 leaflets was the maximum（ 0. 781 ± 0. 366） g and significantly higher than the others,with 5 leaflets was the lowest（ 0. 260 ± 0. 060） g and significantly lower than the others. Rachis biomass was 0. 016-0. 179 g,and the average maximum and minimum were compound leaves with 13 and 5 leaflets,respectively,and both the others difference reached the significant level. Leaflets biomass was 0. 006-0. 886 g,the average maximum 7 leaflets and significantly higher than the others. Plasticity was greater and the variation coefficient was 22. 8%-138% on component biomass of different compound leaves. Biomass allocation to the opposite leaflets of different compound leaves was symmetrical,biomass allocation of the top leaflets and the same phyllotaxis decreased with the increase of the leaflets number. The relationship among component biomass of different compound leaves included isomeric growth type of the linear function and algometric growth type of the exponent function. The relative growth rate of each component biomass during the process of growth could be described specifically by the parameters of correlation equation.