亚热带甜槠天然林生物量和碳储量研究

发布时间：2018-06-14 13:22

  本文选题：甜槠 + 天然林　； 参考：《中南林业科技大学》2017年硕士论文

【摘要】：本研究以湖南芦头森林生态系统定位观测研究站甜槠天然林为研究对象,采用野外调查和室内实验相结合的方法,对其生物量和碳储量进行研究,为芦头生态站的常绿阔叶林研究提供基础性数据,同时也为进一步研究森林生态系统的碳循环和碳平衡提供参考数据,从而更好地对我国亚热带常绿阔叶林进行合理利用和碳汇经营。主要研究结果为:(1)甜槠林的总生物量为384.32t.hm-2;乔木层(373.86t.hm-2)凋落物层(7.66t hm2)灌木层(1.93 t hm-2)草本层(0.87t hm2)。乔木层的生物量为373.86 t·hm-2,占甜槠林总生物量的97.28%;其中树干生物量占绝对优势,为乔木层生物量的60.37%。灌木层生物量为1.93t·hm-2,地上部分(1.39t·hm-2)地下部分(0.54t·hm-2)。草本层生物量只有0.87t·hm-2,地下部分(0.54t·hm-2)地上部分(0.33t·hm-2)。甜槠林凋落物层生物量为7.66t·hm-2,且生物量大小在不同分解阶段表现出已分解层(2.86t.hm-2)半分解层(2.74t·hm-2)未分解层(2.06t·hm-2)。(2)甜槠林单株各器官生物量所占比例大小依次为:树干(48.42%～62.00%)树枝(10.74%～15.04%)粗根(8.19%～10.81%)树皮(5.47%～7.65%)大根(4.67%～6.16%)树叶(3.19%～4.75%)中根(2.46%～4.03%)小根(1.93%～2.92%)细根(1.04%～1.79%),各器官生物量随着径级的增大而增大,不同径级的标准木单株生物量之间差距明显。(3)在径级较小时(8 cm，，16cm,24cm),不同器官按含碳率的大小排序顺序为 C枝(45.32%～46.68%)C皮(44.15%～45.99%)C 干(43.44%～44.80%)C 叶(42.67%～44.33%)C 根(41.54%～43.95%)。而径级较大(32cm,48cm)时,不同器官按含碳率的大小排序顺序为C皮(46.22%～48.52%)C干(45.10%～47.90%)C叶(44.63%～47.57%)C枝(44.42%～46.20%)C根(44.02%～46.68%).甜槠不同器官的含碳率在43.43%～45.90之间,按碳素含量高低排序顺序为C皮C枝C干C叶C根。灌木层植物平均含碳率差别不大,为40.37%～45.84%,草本层植物的含碳率在29.89%～37.58%之间。土壤层0-15、15-30、30-45、45-60、60 cm 的含碳率分别为 4.88%、2.79%、1.54%、0.90%、0.51%,随土壤深度不断加深,土壤含碳率越来越小。(4)甜槠林的总碳储量为329.72t·hm2。乔木层的碳储量为168.40 t·hm2其中树干占绝对优势,占乔木层碳储量的60.59%;灌木层的碳储量为0.84t·hm-2草本层的碳储量为0.31 t·hm-2林下植被层只占到总碳储量的0.35%;凋落物层各层碳储量大小顺序为:半分解层(0.99t·hm2)未分解层(0.92t·hm-2)已分解层(0.65t.hm2),其碳储量为2.56t·hm2;土壤层的碳储量为157.61t·hm-2,土壤层 0-15、15-30、30-45、45-60、60 cm 的碳储量分别为 43.66 t hm-2、25.49 t·hm-2、14.52t·hm2、10.02t·hm-2、6.31t·hm2。甜槠林碳储量的空间分布大小顺序为乔木层(51.07%)土壤层(47.80%)凋落物层(0.78%)灌木层(0.25%)草本层(0.10%)。其中乔木层和土壤层的碳量之和为326.01 t·hm2,占总碳储量的98.87%,甜槠天然林的碳量主要集中在乔木层和土壤层中。
[Abstract]:In this study, the biomass and carbon storage of Castanopsis eyrei natural forest in Lutou forest ecosystem observation station of Hunan Province were studied by combining field investigation with laboratory experiments. It provides basic data for the study of evergreen broad-leaved forest in Lutou ecological station, and also provides reference data for further study on carbon cycle and carbon balance of forest ecosystem. Thus, the subtropical evergreen broad-leaved forest in China is better utilized and managed in carbon sequestration. The main results were as follows: the total biomass of Castanopsis carlesii forest was 384.32 t 路h ~ (-2); the tree layer was 373.86 t 路h ~ (-2); the litter layer was 7.66 t 路hm ~ (2) the shrub layer was 1.93 t 路hm ~ (-2) and the herbaceous layer was 0.87 t 路hm ~ (-2). The biomass of Arbor layer is 373.86 t hm-2, accounting for 97.28% of the total biomass of Castanopsis eyrei, and the trunk biomass is the dominant biomass, which is 60.37% of the total biomass of Arbor layer. The biomass of shrub layer is 1.93 t hm-2, and that of aboveground part is 1.39 t hm-2) the underground part is 0.54 t hm-2. The biomass of herbaceous layer is only 0.87 t hm-2, and that of underground part is 0.54 t hm-2) the aboveground part is 0.33 t hm-2. The biomass of litter layer in Castanopsis carlesii forest is 7.66 t 路hm ~ (-2), and the biomass of litter layer is 2.86 t 路m ~ (-2) (2.74 t 路m ~ (-2) the biomass of each organ of Castanopsis eyrei forest is 2.06 t 路m ~ (-2) 路m ~ (-2) ~ (2) the biomass of each organ of Castanopsis carlesii forest is 48.422cm ~ (62.00). 10. 74 and 15. 04) you have 8. 19 and 10. 81) and you have 5. 47 and 7. 65, and you have a big root, 4. 67 and 6. 16) and you can see that there is a small root of 1.9332.922) and that the biomass of each organ increases with the increase of the diameter, and the biomass of the various organs increases with the increase of the diameter of the tree, and it is about 2. 46 and 4. 75.) the small root is 1. 9332.922) and the biomass of the various organs increases with the increase of the diameter of the tree, and the biomass of each organ increases with the increase of the diameter of the tree. There was a significant difference between the biomass of each tree per plant of different diameter classes.) at a relatively small diameter level, there was a significant difference between the biomass of a single plant (8 cm, 16 cm, 24 cm), and the order of carbon content in different organs was 45.32 (46.68), 44.995 (45.99C), 43.4444 (44.80C), 42.67 (44.33C) and 41.5454 (43.95C). When the diameter is larger than 32 cm ~ (48 cm), the order of carbon content in different organs is 46.22 ~ 48.52 ~ 48.52 ~ 45.10 ~ (10) ~ 47.90 ~ 44.63 ~ 44.57 ~ 44.42 ~ 44.42 ~ 44.42 ~ 44.02C ~ + ~ 44.022 ~ 46.68 ~ (th). The carbon content of different organs of Castanopsis carlesii was between 43.43 and 45.90. According to the carbon content, the order was C peel C branch C stem C leaf C root. The average carbon content of shrub layer plants was 40.377.84%, while that of herbaceous plants was 29.89% (37.58%). The carbon content of 0-15 ~ 15 ~ 30 ~ 30 ~ 45 ~ 45 ~ 45 ~ 60 ~ 60 cm was 4.88 ~ 2.79 and 1.54 ~ 0.90 ~ 0.90 ~ 0.01, respectively. The total carbon storage of Castanopsis eyrei forest was 329.72t / hm ~ (2) as the soil depth deepened and the soil carbon content became smaller and smaller. The total carbon content of Castanopsis eyrei forest was 329.7t / hm ~ (2). The carbon storage of Arbor layer is 168.40 t hm2. The amount of carbon storage in tree layer is 60.59t, in shrub layer is 0.84t hm-2, that in herbaceous layer is 0.31t / hm-2, and that in litter layer is 0.35t / kg. The order of carbon storage in litter layer is 0.99t / hm ~ 2) 0.92 t / m ~ (-2) and 0.92 t / m ~ (-2). The carbon storage of soil layer is 157.61 t 路hm ~ (-2), and that of soil layer is 43.66 t 路m ~ (-2) ~ 25.49 t 路hm ~ (-2) ~ 10.02 t 路hm ~ (-2) ~ 6.31 t 路hm ~ (-2), and that of soil layer is 43.66 t 路h ~ (-2) ~ (-1) ~ 25.49 t 路m ~ (-2) ~ (-1) t 路hm ~ (-2) ~ (-1) ~ (-1) t 路m ~ (-2) ~ (-1) ~ (-1) t 路m ~ (-2), respectively. The order of spatial distribution of carbon storage in Castanopsis carlesii forest is tree layer 51.07) soil layer 47.80) litter layer 0.78) shrub layer 0.25) herbaceous layer 0.1010. The total carbon content of Arbor layer and soil layer was 326.01 t hm ~ 2, accounting for 98.87% of the total carbon storage. The carbon content of Castanopsis eyrei natural forest was mainly concentrated in tree layer and soil layer.
【学位授予单位】：中南林业科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S718.556


本文编号：2017523