【摘要】 本文通过对祁连山水源涵养林主要树种各器官生物量及动态变化进行观测研究，建立了估测乔木层单株立木各器官生物量的回归方程；估测水源涵养林总生物量为４．１７０×１０７ｔ，其中青海云杉林１．９７３８×１０７ｔ，灌木林１．５４８４×１０７ｔ；按各器官生物量排序青海云杉为：干＞枝＞根＞叶＞果，祁连圆柏为：干＞根＞枝＞叶＞果；立木各器官生物量比率反映林木生物学特性和生态学特征更多还原

【Abstract】 According to the measurement of biomass and dynamics change of all organs of the main trees of the water conservation forest in Qilian Mountains,the regression equations had been established to estimate the biomass of all organs of a single tree on the tree stratum.the total biomass of the water conservation forest is 4.1701×10 7t,among which the biomass of P.crassifolia forest is 1.9738×10 7t,the biomass of shrub is 1.5484×10 7t. p.crassifolia allots its biomass to each organ in the order--trunk>branch>root>leaf>fruit,S.przewalskii does it in the order--trunk>root>branch>leaf>fruit.The biomass ratio of all organs of standing tree reflects its ecological and biological characteristics.更多还原