Carbon Measurement Parameters And Biomass Models Of Main Plantations In Eastern Inner Mongolia

In order to slow down global climate change,maintain global carbon balance and better fulfill international responsibilities,China has begun to compile a national greenhouse gas inventory.In Inner Mongolia,because of the lack of suitable for plantation carbon measurement parameter values,the region in the greenhouse gas list compiled by the international default values,to solve this problem need to supplement and improve the main plantation forest region of Inner Mongolia carbon measurement parameters measured,constructs a model of biomass for main plantation in Inner Mongolia,increase the area of artificial forest biomass and carbon estimation precision.is of great significance to the compilation of greenhouse gas inventory and the formulation of reasonable carbon emission trading scheme.Selection of eastern Inner Mongolia mainly plantation reproduction area as the study area,with the main plantation(Larix gmelinii、Larix principis、pinus sylvestris、Populus)as the research object,and chooses the measurement method of eastern Inner Mongolia mainly plantation biomass,the calculation of the plantation carbon measurement parameter values,mainly including biomass transformation and extension factor(BCEF),biomass expansion factors(BEF),root ratio(R)and wood basic density(WD),analysis of influence factors on carbon measurement parameters.The biomass model of main plantations in eastern Inner Mongolia was established,and the following conclusions were drawn:(1)The values of carbon measurement parameters in young or middle aged forests of the four working forests were all greater than the average value,while those in near-mature forests,mature forests and overmature forests were all lower than the average value.The measured values of biomass conversion and expansion factor(BCEF),biomass expansion factor(BEF)and wood basic density(WD)in Larix chinensis and Pinus var.mongrel plantations were 18%-58%larger than the default values,and the measured values of root-shoot ratio(R)were 22%-37%smaller than the default values.Four plantation of biomass conversion and extension factor(BCEF),biomass expansion factors(BEF)with plantation age,diameter at breast height(D)(A),tree height(H)has significant negative correlation,north China larch plantations and mongolica plantation root ratio(R)and forest age(A)A relatively small negative correlation,sing-an larix gmelinii and poplar plantation wood basic density(WD)and diameter at breast height(D),tree height(H)A relatively small negative correlation.(2)through the four types of artificial forest biomass model parameter selection of components,and the inspection and evaluation model,then the biomass,the optimal model of four plantation are the power function model,utilize modern larix gmelinii,north of larix gmelinii,mongolica plantation biomass,the optimal model of components for the power function model of diameter at breast height(D)as the independent variable,and the optimum biomass of poplar plantation model is based on tree height,diameter at breast height(D~2H)power function model of the independent variables.(3)Aboveground biomass(AB)and underground biomass(UB)of the four plantations were significantly correlated with stand volume(V)(P<0.01)Sing-an larix gmelinii,north the ground biomass of larix gmelinii(AB),underground biomass(UB),as well as mongolica plantations and poplar plantation aboveground biomass(AB)in power function for the optimal model,mongolica plantations,poplar plantation of underground biomass(UB)is the optimal model based on hyperbolic function.