發(fā)布時間：2018-06-14 13:22

  本文選題：甜櫧 + 天然林��； 參考：《中南林業(yè)科技大學》2017年碩士論文

【摘要】：本研究以湖南蘆頭森林生態(tài)系統(tǒng)定位觀測研究站甜櫧天然林為研究對象,采用野外調查和室內實驗相結合的方法,對其生物量和碳儲量進行研究,為蘆頭生態(tài)站的常綠闊葉林研究提供基礎性數(shù)據(jù),同時也為進一步研究森林生態(tài)系統(tǒng)的碳循環(huán)和碳平衡提供參考數(shù)據(jù),從而更好地對我國亞熱帶常綠闊葉林進行合理利用和碳匯經(jīng)營。主要研究結果為:(1)甜櫧林的總生物量為384.32t.hm-2;喬木層(373.86t.hm-2)凋落物層(7.66t hm2)灌木層(1.93 t hm-2)草本層(0.87t hm2)。喬木層的生物量為373.86 t·hm-2,占甜櫧林總生物量的97.28%;其中樹干生物量占絕對優(yōu)勢,為喬木層生物量的60.37%。灌木層生物量為1.93t·hm-2,地上部分(1.39t·hm-2)地下部分(0.54t·hm-2)。草本層生物量只有0.87t·hm-2,地下部分(0.54t·hm-2)地上部分(0.33t·hm-2)。甜櫧林凋落物層生物量為7.66t·hm-2,且生物量大小在不同分解階段表現(xiàn)出已分解層(2.86t.hm-2)半分解層(2.74t·hm-2)未分解層(2.06t·hm-2)。(2)甜櫧林單株各器官生物量所占比例大小依次為:樹干(48.42%～62.00%)樹枝(10.74%～15.04%)粗根(8.19%～10.81%)樹皮(5.47%～7.65%)大根(4.67%～6.16%)樹葉(3.19%～4.75%)中根(2.46%～4.03%)小根(1.93%～2.92%)細根(1.04%～1.79%),各器官生物量隨著徑級的增大而增大,不同徑級的標準木單株生物量之間差距明顯。(3)在徑級較小時(8 cm，，16cm,24cm),不同器官按含碳率的大小排序順序為 C枝(45.32%～46.68%)C皮(44.15%～45.99%)C 干(43.44%～44.80%)C 葉(42.67%～44.33%)C 根(41.54%～43.95%)。而徑級較大(32cm,48cm)時,不同器官按含碳率的大小排序順序為C皮(46.22%～48.52%)C干(45.10%～47.90%)C葉(44.63%～47.57%)C枝(44.42%～46.20%)C根(44.02%～46.68%).甜櫧不同器官的含碳率在43.43%～45.90之間,按碳素含量高低排序順序為C皮C枝C干C葉C根。灌木層植物平均含碳率差別不大,為40.37%～45.84%,草本層植物的含碳率在29.89%～37.58%之間。土壤層0-15、15-30、30-45、45-60、60 cm 的含碳率分別為 4.88%、2.79%、1.54%、0.90%、0.51%,隨土壤深度不斷加深,土壤含碳率越來越小。(4)甜櫧林的總碳儲量為329.72t·hm2。喬木層的碳儲量為168.40 t·hm2其中樹干占絕對優(yōu)勢,占喬木層碳儲量的60.59%;灌木層的碳儲量為0.84t·hm-2草本層的碳儲量為0.31 t·hm-2林下植被層只占到總碳儲量的0.35%;凋落物層各層碳儲量大小順序為:半分解層(0.99t·hm2)未分解層(0.92t·hm-2)已分解層(0.65t.hm2),其碳儲量為2.56t·hm2;土壤層的碳儲量為157.61t·hm-2,土壤層 0-15、15-30、30-45、45-60、60 cm 的碳儲量分別為 43.66 t hm-2、25.49 t·hm-2、14.52t·hm2、10.02t·hm-2、6.31t·hm2。甜櫧林碳儲量的空間分布大小順序為喬木層(51.07%)土壤層(47.80%)凋落物層(0.78%)灌木層(0.25%)草本層(0.10%)。其中喬木層和土壤層的碳量之和為326.01 t·hm2,占總碳儲量的98.87%,甜櫧天然林的碳量主要集中在喬木層和土壤層中。
[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.
【學位授予單位】：中南林業(yè)科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：S718.556


本文編號：2017523