油茶林分生物量及生产力的研究

Biomass Survey in Oiltea Stands with Different Levels of Oil Output

本文对3种不同产量水平的油茶林分生物量和生产力进行了测定和研究。结果表明:产油水平从高到低编号为Ⅲ、Ⅱ、Ⅰ的样地,其林分总生物量分别为75.71、41.55、30.49t/hm^2,年平均净生产量分别是5.49、3.12,1.17t/hm^2。各样地油茶林分各组分生物量所占比例的排序为干>根>枝>叶>果>花。各组分枝叶比、果叶比、非光合与光合部分比值均以Ⅲ号样地最大。

Oiltea, Camellia oleifera, plots of three levels of oil output were studied in terms of the trees' biomass and productivity. The plots were labelled Ⅰ , Ⅱ , Ⅲ ,in accordance with an upward level of oil yield. The total biomass of the survey plots increased as the level of oil yield went upward, measuring 30. 49 t/ha,41. 55 t/ha, and 75. 71 t/ha, respectively. The annual mean net output also varied with the level of oil yield, with each upward level yielding 1.17 t/ha. yr, 3. 12 t/ha. yr, and 5. 49 t/ha. yr, respectively. Analysis of component biomass of all sample plots showed that the biomass weight of each component part of the tree fell in the descending order of stem,root, branch, leaf, fruit, and flower. The best ratios of branch to leaf, fruit to leaf, and non -photosynthetic parts to photosyn-thetic ones were all found in plot Ⅲ.