灰木莲人工林生物量和生产力的研究

对广西高峰林场界牌分场46年生灰木莲人工林的生物量和生产力进行测定和研究,建立灰木莲各器官生物量估测模型,分析灰木莲人工林不同径阶的生物量的分配规律和林分生产力。结果表明:生物量估测模型拟合效果理想,达到较高精度,可用于生产实践;灰木莲林分乔木层总生物量为224.86 t·hm-2,干材生物量为155.24 t·hm-2,占总生物量比重的69.04%;林下植被总生物量为5.31 t·hm-2。无论是单株生物量还是乔木层生物量,灰木莲各个器官生物量所占总生物量的比例顺序均为:干材>根系>活枝>干皮>叶子>枯枝;灰木莲人工林单株生物量随着林木径阶的增大而增加,不同径阶差异性显著;灰木莲人工林净生产力为10.09 t·hm-2·a-1。

Studies on the Biomass and Productivity of Manglietia glauce

The biomass and productivity were measured and analyzed for 46-year-old Manglietia glauce in Jiepai Branch of Guangxi Gaofeng Forestry Farm.Using the software to build the biomass model,this paper analyzed the biomass' regular in different diameter and the whole plantation's productivity.The result showed that the biomass models achieved high accuracy,which could be used for practical product.The tree layer of the total biomass was 224.86 t·hm-2,wood biomass was the main point of the total biomass,the proportion was 69.04%,the biomass of understory plants was 5.31 t·hm-2.Manglietia glauce's allocation rate of various organs to the total biomass was in the order: dry wood>root>branch>bark>leave>twigs;Manglietia glauce plantation's single tree's biomass was increased by the diameter,different diameter had notable different.Net productivity of Manglietia glauce plantation was 10.09t·hm-2·a-1.