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以山西省吕梁地区方山县峪口花果山油松人工林为对象,在同一地区选择并设置4块标准地,然后利用直接收获法中的平均木法测定选定所在标准地的生物量,对峪口一带的油松人工林群落生物量、生物量在各器官的分配情况以及峪口地区各种林分密度下油松人工林的生物量进行研究和分析。结果显示:①样地SX-LL-FC-P03-R1、SX-LL-FC-P03-R 2、SX-LL-FC-P03-R 3、SX-LL-DC-P08的群落生物量分别是70.03t/hm2、131.78t/hm2、122.75 t/hm2、99.83 t/hm2;②林分中乔木所包含的生物量在总生物量中占有的绝大部分,为97.99 t/hm2,枯落物层次之,3.03 t/hm2,草本层再次,0.62 t/hm2,灌木层最少,0.35 t/hm2;③油松人工林的树干、树枝、树叶、树根的生物量的分配虽然受立地条件和树龄等客观因素的影响而呈现一定差异性,但单株林木中各个器官生物量所占的比例仍呈现出一些规律:总生物量中树干约占38.44%,树枝约占27.47%,树叶约占18.05%,根系约占16.04%;④不同密度的油松人工林对群落的总生物量也有相当大的影响,SX-LL-FC-P03-R1样地的林分密度为790株/hm2,群落总生物量为70.03 t/hm2,SX-LL-FC-P03-R2样地的林分密度为2 170株/hm2,群落总生物量为131.78 t/hm2,SX-LL-FC-P03-R3样地的林分密度为2 120株/hm2,群落总生物量为122.75 t/hm2,SX-LL-DC-P08样地的林分密度为2250株/hm2,群落总生物量为99.83 t/hm2。
Taking the Pinus tabulaeformis plantation in Huaguo Mountains, Meiyukou of Meiyukou in Yukou, Lianshan County, Shanxi Province as an example, four standard plots were selected and set up in the same area. The biomass of the selected standard was determined by the average wood method in the direct harvesting method The biomass of Pinus tabulaeformis plantation, the distribution of biomass in various organs and the biomass of Pinus tabulaeformis plantation in the Yuzuk area were studied and analyzed. The results showed that: (1) The community biomass of SX-LL-FC-P03-R1, SX-LL-FC-P03-R2, SX-LL-FC-P03-R3 and SX-LL-DC- Is 70.03t / hm2, 131.78t / hm2, 122.75t / hm2, and 99.83t / hm2 respectively. (2) Most of the biomass contained in the arbor in the forest is 97.99 t / hm2 The distribution of biomass of tree trunk, branch, leaf and root of Pinus tabulaeformis plantation was controlled by site conditions (3.03 t / hm2, 0.62 t / hm2 for herb layer and 0.35 t / hm2 for shrub layer) And tree age. However, the proportion of individual organ biomass per plant still showed some rules: the total biomass accounted for about 38.44% of the trunk, the branch about 27.47%, the leaves about Accounting for 18.05% and 16.04% of the root system respectively. (4) The Pinus tabulaeformis plantations with different densities had a considerable impact on the total biomass of the community. The stand density of SX-LL-FC-P03-R1 plots was 790 plants / hm2 , The community total biomass was 70.03 t / hm2, the stand density of SX-LL-FC-P03-R2 was 2 170 plants / hm2, the total biomass of the community was 131.78 t / hm2, The stand density of -R3 plot was 2 120 plants / hm2, and the community total biomass was 122 .75 t / hm2, the stand density of SX-LL-DC-P08 plots was 2250 plants / hm2, and the community total biomass was 99.83 t / hm2.