Study On Carbon Storage Of Main Forest Types In Jinggangshan Nature Reserve Based On GIS

Forest ecosystem carbon storage research has important significance in terrestrial carbon cycle and global climate change, as one of the most important carbon store of terrestrial ecosystems. In this paper, Jinggangshan Nature Reserve as a study area, it is located in the southwest of Jiangxi province, with sampling and field investigation and Forest Resource Inventory data, the geo-spatial analysis and statistical methods were used to estimation of vegetation ecosystem carbon storage and analysis of soil carbon storage and its spatial distribution by GIS technology as a means in the study area, result as follows:(1) Base on the data from Forest Resource Inventory, the method of biomass volume source was used to estimate its carbon storage in the major forest types in Jinggangshan Nature reserves. The total carbon of forest cover is 1359594.09 tons, the average carbon density was 47.76 t/hm2. Which coniferous forest, broadleaf forest, coniferous forest, bamboo forest, bush and other land carbon storage are 224,239.56 tons,695,501.28 tons,295,342.51 tons,118,757.94 tons,25,752.80 tons and 2,816.24 tons respectively, carbon density is 36.41 t/hm2,65.43t/hm2,65.31 t/hm2,31.10 t/hm2,14.78 t/hm2 and 1.70 t/hm2 respectively in Jinggangshan Nature reserves. The arbor forest is the main forest vegetation carbon in the Jinggangshan Nature reserves, 89.18% of total carbon storage. Largest reserves of natural forests in which the carbon is carbon storage in plantation about 5 times; carbon storage of near mature forest and mature forest are the highest, its aggregate accounted for 69.77% of total carbon storage, and carbon density with age and advanced level increase, so to strengthen scientific management to the young forest and middle-aged forest, for enhance the carbon gather function of forest will be of great significance in the Jinggangshan Nature reserves.(2) Digital elevation model was used to the study area with the vegetation carbon density distribution map of the forest vegetation carbon storage in space differentiation, based on GIS software. Jinggangshan Nature Reserve's Forest Carbon Storage from south to north show the status of the South than in the north, the carbon density of more than 80t/hm2 blocks of classes focused on two core areas, showing the vertical distribution of the normal characteristics of gradient to 800-1100m largest carbon storage, range of 265-500m and 1400-1775m gradient of carbon storage in the smallest.Among flat slope, gentle slope, slopes, steep slopes, acute slope and risky slope six gradient, distribution characteristics of carbon that slope carbon storage is the largest and risky slope carbon storage is the smallest, but the carbon density is gradually increased with increasing slope, risky slope is maximum. Distribution characteristics of carbon density are shady and semi-sunny slope to be slightly higher than half the carbon density of the southern and semi-shady slope, carbon storage and density of no slope direction of forest vegetation are the lowest.(3) GIS estimation method with the soil types method were applied to estimation of soil organic carbon storage in the study area, the result is 3003555.5t, the average carbon density is 107.03 t/hm2 and 2.24 times the carbon storage of vegetation. Soil carbon density with altitude has high correlation with the increase of altitude increase soil carbon density. Among carbon density of soil type, meadow soil top and carbon density is 16.41kg/ m2, red soil minimum and carbon density is 8.96 kg/m2. The carbon density overall trend are the south than in the north and west than in the east.(4) Organic carbon storage of forest ecosystems in Jinggangshan Nature Reserve was 4363149.6t, the average carbon density was 153 t/hm2, where soil organic carbon storage was 2.2 times in the vegetation carbon storage. In five forest vegetation types, organic carbon storage of broad-leaved forest was the highest, followed by coniferous forest, once again, mixed coniferous and bamboo forests, and organic carbon storage of shrubs was minimum.