Carbon Storage Of Young Plantation Pine After Desertification Control In Shaoyang County

With the worsening of global warming, Karst rocky desertification, as a serious problem of ecological and environmental degradation, had severely constrained the local social and economics sustainable development, and had gradually been valued by more people. Pine is a common afforestation and imported timber species in China, which have been widely introduced and used for the restoration of the pioneer species. Pine has the characteristics that resistants barren and quickly grows in the early. After the restoration of the desertification areas, not only prevented soil from erosion effectively and improved the local forest landscape, but also increased the storage of carbon in desertification areas and mitigated the greenhouse effectively. So the quantitatively researches of forest growth and carbon storage on the desertification control project, can provide valuable data and theoretical basis for the accurate assessment of the ecological benefits of desertification control project. But there were few reports about researches for desertification control about carbon storage specifically. In this paper, use the plantation pine ecosystem in GuZhou valley in Shaoyang county after vegetation as the study objects. Investigated in field sample plot with the method of Indoor potessium dichromate potassium-hydration heat, determinated and analyzed carbon content and carbon storage and distribution capacity of in different rocky desertification degree (mild, moderate, and severe) Pinus elliottii artificially young forest in Shaoyang county. And the results showed that:With increasing degree of the three kinds of wetland, soil carbon content of pine desertification decreased. The average values were 0.98%,0.77%, 0.67%.Soil carbon storage were 26.109,19.165,14.282 t/hm2, and soil carbon storage of mild rocky desertification was slightly higher than the other two desertification. There was a certain linear relationship between soil bulk density and soil organic carbon storage. Between Slash Pine Soil organic carbon and soil total nitrogen there was a highly significant positive linear correlation. Correlation coefficient:r2=0.6196, Equation: y=8.363x-0.3532. C/N ratio equation under desertification process:y=0.1997x-0.3047, r2=0.7078.Between soil organic carbon content and soil pH, negative correlation significant linear exists. Correlation coefficient:r2=0.9376,Equation y=-1.8414x+8.2992.The carbon content of different organs of slash pine range of 47.10%～51.32%.In mild slash pine rocky desertification,carbon content in different organs range of 47.73 %～50.95%; For moderate rocky desertification the range was 47.10%～49.92%;To severe desertification the range was 45.82%～49.97%. From high to low, organs of three pine plots carbon storage:Mild and moderate were, trunk> leaves> roots> branches, as the severe:leaves> stem> roots> branches. The carbon storage of three young pine forest were 13.800 t/hm2,4.817 t/hm2,2.319 t/hm2.Ground carbon storage of the total carbon storage were 87.83%,86.55%,81.67%.Forest tree species ecosystem in the same age, but in different rock desertification, the forest carbon storage were:mild> moderate> severe. The average carbon content of wetland shrub layer, herb layer and death of Litters layer of pine forests slight desertification, was 51%-59%,and there were no significant differences among them.The carbon storage of the shrub layer were mild desertification (0.977t/hm)<severe desertification(2.635t/hm2)<moderate desertification(2.334t/hm2). Litter carbon storage were 0.320,0.754,1.034 t/hm2.Carbon storage of young pine ecosystem in slight desertification, moderate desertification and severe desertification were 41.266,27.371,19.969 t/hm2, and decreased with the increasing degree of desertification.The first productivity of three slash pine plantation were 5.24,3.05,2.7 t/hm2 a. And annual net carbon storage were 2.62,1.55,1.41 t/hm2 a.If all of the county desertification land planting pine, after 6 years of desertification control project, slash pine plantation carbon storage in Shaoyang County would be:mild carbon storage in existing desertification 1.04×106t, moderate desertification existing carbon storage in 0.35×106t, severe desertification of existing carbon storage in 0.06×106t, the total potential for carbon sequestration 1.45×106t, equivalent to a fixed CO2 32954.5t, the average annual carbon sequestration 0.24×106 t·a-1.