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运用样方收获等方法对桂西南地区32年生擎天树人工林的生物量、生产力进行研究。结果表明:各器官生物量与测树因子D2H间存在密切联系,拟合的回归模型可靠度高。林分平均木单株生物量与径级呈正相关,且不同径级间差异显著。各器官生物量由大到小的排序依次为:树干、枝条、根兜、干皮、叶子、粗根、中根、细根。平均木单株生物量达654.8 t/hm2,其中树干的生物量达410.8 t/hm2,占全株生物量的62.7%,年净生产力达10.74 t/hm2.a。
The biomass and productivity of Chinense Schneideriana plantation in the southwest of Guangxi were studied using quadrat harvesting methods. The results showed that there was a close relationship between biomass of each organ and tree-staging factor D2H, and the fitted regression model was highly reliable. The stand biomass per plant had a positive correlation with the diameter and the difference between the different diameter classes was significant. The descending order of the biomass of various organs was as follows: trunk, branches, root pocket, dry skin, leaves, coarse roots, middle roots and fine roots. The average biomass per plant reached 654.8 t / hm2, of which the trunk biomass reached 410.8 t / hm2, accounting for 62.7% of the total plant biomass with an annual net productivity of 10.74 t / hm2.a.