Dynamic Change Of Carbon Storage For Larch Plantation In Heilongjiang Province

Based on the36sample trees of carbon storage and5periods data of forest resources continues inventory in Heilongjiang province from1986～2005, the dynamic change of carbon storage for Larch plantation were estimated by using non-linear error-in-variable model. The results showed that the carbon density of different organs were within456.7mg·g-1～479.0mg·g-1for Larch plantation in Heilongjiang province. The differences of carbon density of different organs were significant. The carbon density of different organs varied in the order: leaf>branch>stem>root. The carbon storage ratios of different ages in various organs were66.75%～68.92%of stems,21.59%～22.62%of roots,5.99%～8.16%of branches and2.47%～3.50%of leaves, respectively. The proportion of carbon storage of roots and branches increases with growing, while that of stems and leaves presented opposite result.The range of carbon storages for Larch plantation in different areas of Heilongjiang province were3.13t·hm-2～11.03t·hm-2in1986,6.62t·hm-2～16.61t·hm-2in1990,17.53t·hm-2～25.61t·hm-2in1995,22.26t·hm-2～35.71t·hm-2in2000,25.44t·hm-2～34.35t·hm-2in2005, respectively.The carbon storage for Larch plantation in Southern part of Lesser Xing’an Mountains, Western part of Zhang Guangcai Mountains and Wandashan Mountains has a tendency of increase from1986to2005and stabilize at around30t·hm-2in2005. The carbon storage for Larch plantation in Southern part of Lesser Xing’an Mountains and Eastern part of Zhang Guangcai Mountains has a tendency of increase from1986to2000, while it has a opposite tendency from2000to2005and was more than25t·hm-2in2005. The carbon storage for Larch plantation in Southern part of Lesser Xing’an Mountains, Northern part of Lesser Xing’an Mountains, Eastern part of Zhang Guangcai Mountains, Western part of Zhang Guangcai Mountains and Wandashan Mountains increased at1.17t·hm-2,1.06t·hm-2,1.15t·hm-2,0.92t·hm-2and1.42t·hm-2respectively during1986and2005per year. On the whole, the carbon storage of Larch plantation in Heilongjiang province has a tendency of increase from1986to2005and up to29.42t·hm-2in2005. The carbon storage increased at1.21t·hm-2during1986and2005per year.