三门峡山区典型森林植被乔木层生物量动态研究

摘要

We selected the mountain typical forest vegetations in Sanmenxia as the research object. The tree species in 18 standard plots were measured and the factors such as tree height and diameter at breast height were measured,and the biomass was calculated and analyzed by using the different speed growth model. The results showed that the total biomass of forest vegetation in tree layer was 208.73 t · hm-2 calls in Sanmenxia,where in the biomass dominant tree species Quercus variabilis was 116.91 t · hm-2,accounting for 54.65%of the total biomass of tree layer;other major locust species,Quercus variabilis,Pinus armandii and Japanese larch accounted for 4.98%, respectively,10.97%,16.03%,13.37%. Locust advantage in numbers,accounting for 13.79%of the total number of trees in the tree but only 4.98%in the total biomass,pine and Japanese larch although the number is only 6.34%and 6.11%,but the biomass accounted for 16.03% and 13.37%. Early development Quercus variabilis biomass proportion of the total biomass gradually increase,the average diameter at 4-8 cm biomass growth rate of the fastest, at an average diameter of 16cm biomass proportion reaches a maximum and then began to fall ,but still in a dominant position,each organ biomass proportion of the total biomass in decreasing order of trunk>roots>branches>bark>leaves.%选择三门峡山区典型森林植被作为研究对象，对18块标准样地内的乔木树种，分别测量出树高、胸径等因子，通过异速生长模型进行生物量计算与分析.结果表明，三门峡森林植被乔木层总生物量为208.73 t·hm-2，其中优势树种栓皮栎的生物量为107.81 t·hm-2，占乔木层总生物量的54.65%；其他主要树种刺槐、锐齿槲栎、华山松和日本落叶松分别占4.98%，10.97%，16.03%，13.37%.刺槐在数量上占据优势，占乔木总株数的13.79%，但是在生物总量上只占4.98%.华山松和日本落叶松虽然在数量上只占6.34%和6.11%，但是生物量却占16.03%和13.37%.栓皮栎发育前期其生物量占总生物量的比例逐步增加，平均直径在4～8 cm时生物量增长速率最快，在平均直径达16 cm时生物量所占比例达到最大值，然后开始有所回落，但仍占主导地位，各器官生物量在总的生物量所占比重从大到小依次为树干>树根>树枝>树皮>树叶.