Analysis of Yunnan province 1992-2007 carbon dynamics of forest vegetation change and carbon sequestration potential
|School||Yunnan University of Finance|
|Course||Management of land resources|
|Keywords||carbon storage of forest capacity of carbon sequestration carbonintensity forest cover Yunnan|
Yunnan in the control of CO2concentration and response to global climatechange, a large province as China’s forest resources, forest ecosystems make animportant contribution to forest carbon reserves in Yunnan is particularly important.In this paper, biomass conversion factor is a continuous function method and theforest stock volume expansion method, combined with four periods in YunnanProvince,1992—2007forest resource inventory data to study the dynamiccharacteristics and forest carbon sequestration potential of forest carbon stocks inYunnan, and in accordance with carbon storage and carbon density of the seventhnational forest resource inventory data between Yunnan and other provinces wereanalyzed. In this paper, results are as follows:（1） Existing vegetation carbon reserves of forest in Yunnan Province is812.30×106tC, the broad-leaved forest takes63.71%among this, and it plays theleading role in vegetation carbon reserves of forest in Yunnan Province; in2007, theaverage carbon intensity of vegetation carbon reserves of forest in Yunnan Provinceis38.99tC/hm2, in all kinds of forests, the number of carbon intensity is thatbroad-leaved forest> coniferous forest> bamboo forest> economic forest> arbuscle,in the advantages of every seeds of trees according to forest stand, the largest carbonintensity is hemlock and the carbon intensity is134.10tC/hm2, broad-leaved mixedQuercus together takes46.23%of carbon storage in forest stand whole province; inaccordance with carbon storage of age group, young forest> immature timber>mature forest> near-mature plantation> over-mature stands, but the carbon intensityof over-mature stands is greater than young forest; carbon storage of natural foresttakes95.68%of carbon storage in forest stand whole province, natural forest’scarbon intensity is2.59higher than planted forest, the natural forest takes moreadvantages whether talking about carbon storage or carbon intensity.（2） From the year of1992to2007, the average annual increment of forest areain Yunnan Province is58.49×104hm2, average annual growth rate is6.22%, average annual increment of forest accumulation is2990.13×104m3, average annual growthrate is3.56%, average carbon intensity of forest cover in whole province each year is1997>1992>2007>2002. From the year of1992to2007, the area, accumulationand carbon storage of planted forest take rising proportion of forest stand, it showsthat some related departments of Yunnan Provincial government pay more attentionto the operating management of planted forest.（3） According to the12th Five-Year Plan of forestry development in YunnanProvince,2015and2020, the province’s forest capacity of carbon sequestration up to169.38×106tC and the319.98×106tC expansion of forest resources at the sametime, strengthen the intensive management, improvevolume of forest per unit area,the forest capacity of carbon sequestration will reach the509.11×106tC and the633.31×106tC.（4） By contrast found with the other provinces of the country, Yunnan carbonstorage of forest resources and forest carbon intensity has a clear advantage.The dynamic characteristics of the integrated Yunnan forest carbon stocks, thepotential for carbon sequestration and carbon storage in the characteristics ofsuggestions on Yunnan development of forest carbon sinks.