【作者】 乌吉斯古楞；

【导师】 郭连生；

【作者基本信息】 内蒙古农业大学 ， 森林培育， 2006， 硕士

【摘要】 本文以大青山阴坡30a油松人工林为研究对象,测定研究了不同密度油松人工林胸径、生物量、叶面积指数等,研究结果表明:(1)蓄积量、木材密度、高径比、枝下高与林分密度呈正相关;单株材积和平均胸径在2200株/hm2~3300株/hm2密度范围变化较大,与林分密度呈负相关。(2)当密度由2200株/hm2增加到3300株/hm2时,单株地上生物量从22.48kg减小到13.04kg ;各器官生物量分配比例树干占48.70%~60.35% ,树枝占21.17%~26.35%,树叶占9.47%~14.92%,树皮占7.29%~12.95%,果占0.45%~1.94%。(3)对树干解析结果分析指出,径生长速率随树龄而变化,不同密度林分最大径生长速率的树龄也不同,当密度3307株/hm2时为27a,而密度2202株/hm2、2933株/hm2和4463株/hm2时为21~24a。(4)对阴坡不同坡位胸径总生长量结果分析指出,阴坡中部胸径小于阴坡上部和下部。树龄为30a时,中部胸径为5.83cm,上部和下部分别为7.10cm和6.53cm。最大径生长速率的树龄阴坡下部小于中部和上部,为18a,上部和中部大于21a。(5)30a油松人工林叶面积指数与密度无显著相关性,在被试的密度范围内(2202~4463株/hm2)各样地平均叶面积指数在6.334 m2/m2左右。更多还原

【Abstract】 The artificial Pinus tabulaeformis forest of 30 years old on Daqing Mountain was studied in this article, the analysis of the growth procedure, biomass and LAI of different densities in the similar site condition show:(1) The amount of growing stock, the timber density, the ratio between height and diameter breast height and the timber height, all these have positive correlation with the stand densities, the timber volume and the mean diameter breast height change great at the stand densities range of 2200~3300 stock/ha and has negative correlation with the stand densities.(2) Individual biomass above the ground decrease from 22.48kg to 13.04kg as the stand density increase from 2200 to 3300 stock/ha; The distribution of the biomass of the individual organ is that stock occupies 48.70%~60.35%, branches occupy 21.17%~26.35%, leaves occupy 9.47%~14.92%, cortex occupies 7.29%~12.95%, cones occupy 0.45%~1.94%.(3) Tree analysis shows, the growth speed of the diameter breast height changes with the tree age, the biggest speed is different in the different sample area, it is 27a when the stand density is 3300 stock/ha. While it is 21~24a when the stand density is 2202, 2933 and 4463 stock /ha.(4) The result of the total growth of the diameter breast height on the different site of northern slope of mountains shows, the diameter breast height in the middle slope is smaller than the top and the base. When the age of trees is 30a, the diameter breast height in the middle is 5.83cm, in the top is 7.10cm and the base is 6.53cm.the trees’age of the base is smaller than the top and the middle when the speed of the diameter breast height is the biggest, the age is 18a and the age in the top and middle is bigger than 21a.(5) The LAI of the artificial Pinus tabulaeformis forest of 30 years has no remarkable correlation with the stand density, the mean LAI is about 6.334s.q.m/s.q.m at the sample range of 2200~4463 stock/ha.更多还原