内蒙古东部山杏与柠条灌木林地上碳储量模型研究

发布时间：2018-12-08 09:02

【摘要】：森林碳储量对全球碳循环研究具有重要意义,而灌木林是森林生态系统的重要组成部分,因此,对灌木林生物量和碳储量方面的研究是准确评估森林生态系统碳库的基础。本研究以内蒙古东部兴安盟地区的山杏林和柠条林为研究对象,首先在实测数据的基础上,研究各器官鲜重、含水率、生物量和含碳率情况,再在此基础上探讨各树种的实测生物量和碳储量。其次,对实测灌木形态指标与地上生物量进行回归分析,建立树种的地上生物量模型,其后结合含碳率,构建树种地上碳储量模型,最后对不同评估碳储量方法进行比较分析,结果表明:1.研究区天然山杏、人工山杏、柠条灌木层生物量依次为536.95、396.17、1164.69 g/m2,总体上各器官生物量大小顺序,枝根叶,其中天然山杏地上部分比例占60%左右,根系部分占40%以内;人工山杏和柠条地上部分比重在70%左右,根的比重在30%左右。2.引用常用的回归方程,模拟了山杏和柠条的单株地上生物量。结果表明,树种的生物量回归方程均显著,其线性方程的拟合效果最优,精度检验在80%以上,可应用于实际生物量研究。3.结合山杏生物量模型和含碳率,建立了单株地上碳储量回归模型。天然山杏地上碳储量模型为y=1.2375DH+32.13。人工山杏单株地上碳储量模型为y=0.1575D2H+221.77。柠条单株地上碳储量模型为y=11.93H-963.69。4.通过回归模型碳储量估算和实测碳储量相比较表明,模型的估计值和实测值总体上非常接近,天然山杏的单株实测碳储量为696.94 g、967.16 g、1179.57 g、382.89 g、336.39 g,相应估计值为 727.37g、871.90g、1130.17 g、395.71 g、263.13 g;人工山杏的单株的实测单株碳储量为518.98g、306.38 g、1145.98 g、444.74 g,相应估计值为454.82 g、232.21g、1244.74g、479.94 g;柠条的实测单株碳储量为1351.16、1207.97 g、1721.06g、1028.99 g,其相应估计值为1134.37 g、1238.47 g、2231.58 g、829.90 g。
[Abstract]:Forest carbon storage plays an important role in the study of global carbon cycle, and shrub is an important part of forest ecosystem. Therefore, the study of shrub biomass and carbon storage is the basis of accurate assessment of forest ecosystem carbon pool. In this study, the almond forest and Caragana korshinskii forest in XingUNITA area of eastern Inner Mongolia were taken as the research objects. Based on the measured data, the fresh weight, moisture content, biomass and carbon content of each organ were studied. On this basis, the measured biomass and carbon storage of each tree species are discussed. Secondly, regression analysis between the measured shrub morphological index and aboveground biomass was carried out to establish the aboveground biomass model of tree species, and then combined with the carbon content rate, the above ground carbon storage model of tree species was constructed. Finally, the different methods of carbon storage assessment were compared and analyzed. The results show that: 1. The biomass of natural apricot, artificial apricot and Caragana shrub layer was 536.95396.17 (1164.69 g / m ~ 2), and the biomass order of each organ, branch, root and leaf, was about 60%. The part of root system is less than 40%; The proportion of aboveground part of artificial apricot and Caragana is about 70%, the proportion of root is about 30%. The aboveground biomass of apricot and Caragana korshinskii was simulated by using the commonly used regression equation. The results show that the regression equations of the biomass of tree species are significant, and the fitting effect of the linear equation is the best, and the precision test is more than 80%, which can be applied to the study of actual biomass. Based on the biomass model and carbon content of apricot, a regression model of aboveground carbon storage was established. The above ground carbon storage model of natural apricot is y=1.2375DH 32.13. The aboveground carbon storage model of artificial apricot was y=0.1575D2H 221.77. The aboveground carbon storage model of Caragana korshinskii is 11.93H-963.69.4. The comparison between the estimation of carbon storage by regression model and the measured carbon storage shows that the estimated value of the model is very close to the measured value, and the measured carbon storage per plant of natural apricot is 696.94 g / kg 967.16 g / L 1179.57 g / g ~ 382.89 g / g. 336.39 g, the corresponding estimated value is 727.37 g ~ 871.90 g / g ~ 1130.17 g / g ~ 395.71 g / m ~ 263.13 g; The measured carbon storage per plant of artificial apricot was 518.98g / L 306.38g / L 1145.98g / L ~ (444.74) g / L, and the corresponding estimated value was 454.82 g / L 232.21g / kg ~ 1244.74g / g ~ 479.94 g / g; The measured carbon storage per plant of Caragana korshinskii was 1351.161.1207.97g / L 1721.06g / L 1028.99g, and the corresponding estimated value was 1134.37 g / kg 1238.47g / kg / kg ~ 2231.58g / g ~ 829.90 g / g.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S718.5

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