麻栎人工林的生物量与生产力

Biomass and Productivity of Quercus acutissima Plantation

为给麻栎人工林培育和经营提供参考,通过样方收货法采集样品,建立不同器官生物量模型,对广西良凤江国家森林公园27年生的麻栎人工林进行生物量和生产力研究。结果表明,麻栎人工林总生物量高达236.07t/hm2,单株立木生物量随着径阶的增加而增加,径阶间生物量差异显著;不同器官生物量大小依次为树干>枝>根蔸>叶>粗根>中根>细根;林分年净生产力为14.94t/(hm2·年),叶片的年净生产力最高,为6.21t/(hm2·年)。结论:麻栎人工林生物量主要集中于树干,叶片年净生产力较高,林分物质循环迅速,为速丰生产优质培育树种。

The biomass and productivity of Quercus acutissima plantation with 27-year age in Liangfengjiang National Forest Park,Guangxi were studied by building different biomass models of different organs to provide a reference for cultivation and management of Q.acutissima.The total biomass of Q.acutissima plantation was up to 236.07 t/hm2 .The biomass per standing tree increased with diameter increasing and there was significant difference in biomass between different diameters.The biomass of different organs was trunk〉branch〉 root stump〉leaf〉thick root〉medium root〉rootlet.The annual net productivity of stand tree was 14.94 t/（hm2 ·a）and the leaf annual net productivity reached 6.21 t/（hm2 · a）,which was the highest among different organs.In conclusion,the biomass of Q.acutissima plantation with higher leaf annual net productivity and rapid circulation of stand material concentrates mainly on trucks,which indicated that Q.acutissima was a good fast-growing tree species.