Study On Carbon Storage Of Man-planted Pinus Koraiensis Wood And Wood Products

Global warming was mainly caused by the increasing number of greenhouse gases made by the human activity, especially CO2. And the wood contained50%carbon, it was a huge carbon sink. Studying the wood carbon storage function had great significance to cultivate the superior quality plantation forest with high carbon storage, and establish the measures of carbon storage and emission reduction.This paper took man-planted Pinus koraiensis wood as the research object, mainly studied the carbon storage function of Pinus koraiensis wood and wood products. First of all, researched the influence of Pinus koraiensis wood anatomical and physical characteristics on wood carbon storage through the methods of regression analysis and correlation analysis, and analyzed the internal correlation between characteristic indexes and carbon storage. Secondly, researched the influence of different management measures (included the site conditions, meteorological conditions and cultivating measures) on wood carbon storage through the methods of statistical analysis and multiple regression analysis and correlation analysis, in order to confirm the management measures of superior quality plantation forest with high carbon storage. Thirdly, based on the fractal theory, studied the Pinus koraiensis wood carbon storage through fractal analysis from the nonlinear perspective, and discussed the regular change. Finally, based on the theory of life cycle assessment, established the calculation model of CO2emissions of wood products carbon storage cycle, and combined with specific instances, evaluated the wood products carbon storage cycle.The research conclusions were summarized as follows:(1) The radial variation rules of Pinus koraiensis carbon storage of growth ring, early wood and latewood were similar. And grow ring carbon storage respectively had highly significant correlation with early wood and latewood carbon storage at the level of0.01.(2) The influence of Pinus koraiensis wood anatomical and physical characteristics on carbon storage was mainly displayed in the following aspects. Earlywood and latewood carbon storage respectively had highly significant positive correlation with earlywood and latewood tracheid length and tracheid length-width ratio, and had relatively significant negative and positive correlation with earlywood and latewood tracheid wall thickness, and had highly significant negative correlation with earlywood and latewood microfibril angle. Latewood carbon storage had relatively significant positive correlation with latewood tracheid diameter and tracheid wall rate. Earlywood and latewood carbon storage had significant positive correlation with earlywood and latewood density, and had highly significant positive correlation with latewood rate, and had highly significant negative correlation with growth rate. Earlywood carbon storage had highly significant negative correlation with earlywood width. Wood carbon storage and other characteristics had not significant correlation.(3) Aiming at Pinus koraiensis wood carbon storage under different site conditions, drew the summary that, Fangzheng Forest Farm> Liangshui Forest Farm> Laoshan Forest Farm, and the slope position which both in shady slope and on top of slope> other slope position, and during the soil types, albic horizon dark brown soil> albic soils.(4) Under different meteorological conditions, Pinus koraiensis carbon storage of Laoshan Forest Farm and Liangshui Forest Farm had certain correlation with mean temperature, mean ground temperature, sunshine percentage, relative humidity and rainfall. When the meteorological factors influenced reciprocally, in Laoshan Forest Farm, the rainfall of January had highly significant negative correlation with wood carbon storage, the mean ground temperature of April had highly significant positive correlation with wood carbon storage, the mean ground temperature of October had highly significant positive correlation with latewood carbon storage, and the relative humidity of October had highly significant negative correlation with growth ring and earlywood carbon storage. In Liangshui Forest Farm, the rainfall of January and sunshine percentage of February both had highly significant negative correlation with growth ring and earlywood carbon storage, the mean ground temperature of April had highly significant positive correlation with growth ring and earlywood carbon storage, the relative humidity of October had highly significant negative correlation with latewood carbon storage. And the meteorological factors of March, May, July, August, November of Laoshan and Liangshui Forest Farm, and wood carbon storage all had not significant correlation.(5) Aiming at Pinus koraiensis wood carbon storage under different cultivating measures, drew the summary that, during the stand structure, pure forest> mixed forest> three trees a clump. During the planting density,1.5m×1.0m>2.0m×2.0m>1.5m×1.5m. And during the thinning measures, thinning> no thinning.(6) When managing the man-planted Pinus koraiensis with high carbon storage, Fangzheng Forest Farm was better than Liangshui Forest Farm, the slope position which both in shady slope and on top of slope was better than other slope positions, albic horizon dark brown soil was better than albic soils, they could help to improve the wood carbon storage. It was better to increase1～2℃of the mean ground temperature of April and July appropriately, and rise the relative humidity of November, reduce the relative humidity of January, May, July, September and October, reduce the rainfall of January and raise the rainfall of April appropriately. And that, the best stand structure was pure forest, the best planting density was1.5m×1.0m, also could implement moderate thinning.(7) To study the carbon storage of Pinus koraiensis by fractal theory, could drew the summary that, the radial variation trend of Pinus koraiensis carbon storage of Laoshan ForestFarm was close to Liangshui Forest Farm, and the carbon storage capacity of Liangshui Forest Farm was higher than that of Laoshan Forest Farm. The mean fractal dimension of juvenile wood and mature wood carbon storage of Liangshui Forest Farm was obviously higher than that of Laoshan Forest Farm, its gradient distribution of carbon storage was more complex than Laoshan Forest Farm and the effect of carbon storage was superior to Laoshan Forest Farm. The radial variation trend of carbon storage of sunny slope and shady slope was similar, and the carbon storage capacity of shady slope was higher than sunny slope. The mean fractal dimension of juvenile wood and mature wood carbon storage of shady slope was obviously higher than that of sunny slope, its range of variation of gradient distribution of carbon storage was larger than sunny slope, and the effect of carbon storage was better than sunny slope.(8) Based on the theory of life cycle assessment, established the calculation model of CO2emissions during the whole life cycle of wood products and the stages of production, transportation and disposal. And taking the medium density fiberboard produced by a MDF factory as an example, evaluated its carbon storage cycle, and obtained that, the total CO2emissions of medium density fiberboard during the stages of production, transportation and disposal of carbon storage cycle was32.8135kg/m2. Among it, about59%came from the stage of disposal,39%came from the stage of production and2%came from the stage of transportation.