应用全收割法测定广东省鼎湖山南亚热带常绿阔叶林林下层植物生物量 ,林下植物总生物量为 12 9 58g/m2 ,其中茎、枝、叶、根的生物量占总生物量的比例约为 4 0 % ,9 0 % ,2 2 % ,2 9% .由部分实测数据建立林下植物个体生物量估算模型为W =0 0 0 4 2 ·H1 932 3.应用该模型得到的估算值 ,与收获实测值的相对误差仅为 1 8% ,具有良好的精度 .此外 ,还通过改变取样面积对该模型的适用性进行了探讨 . The total biomass of undergrowth plants in the subtropical evergreen broad-leaved forest in Dinghushan of Guangdong Province was determined by total harvesting method. The total biomass of undergrowth plants was 12 9 58 g / m 2, and the biomass of stems, branches, leaves and roots as a percentage of the total biomass About 40%, 90%, 2 2% and 29%, respectively.According to some measured data, the estimation model of individual biomass of understory plants was W = 0 0 0 4 2 · H1 932. 3. The estimation obtained by using this model The relative error between the measured value and the actual measured value was only 18%, with good accuracy. In addition, the applicability of this model by changing the sampling area was also discussed.