Carbon Storage Of Larch Forests At Local Scale In Northern Greater Hinggan Mountains,Inner Mongolia

Daxing’anling forest area is located in the high latitude cold area,the soil has a frozen soil layer,belongs to one of the global climate sensitive areas,the forest area ranks first in China’s forest area,is the world and China’s important carbon reservoir.As the main dominant tree species and population species in this area,the forest stand accumulation accounts for the largest proportion of the cold temperate forest area in China,so the study of the carbon storage of Xing’an larch forest is of great strategic significance.In this study,taking the Xing’an larch forest in the northern forest area of Daxing’anling Mountains in Inner Mongolia as the research object,the biomass and carbon density of the Xing’an deciduous forest were analyzed by plot survey method and model simulation method,and then the distribution of vegetation and soil carbon storage was studied.(1)The vegetation biomass of each forestry bureau increases with the growth of forest age,and the biomass of living standing wood accounts for the largest proportion of vegetation biomass,accounting for about 87%.(2)The carbon content of the vegetation layer of each forestry bureau is basically about 0.44,of which the carbon content of the vegetation layer of the Genhe Forestry Bureau is the largest,the carbon content of the vegetation layer increases with the growth of forest age,the carbon content of inverted wood and dead standing wood is basically greater than that of living standing wood,the carbon content of herbs,shrubs and ground surface litter is smaller than that of living standing wood,the carbon content of living standing wood in each component is closest to the carbon content of vegetation layer,the soil carbon content rate of the same age group is 0 to 10 cm,and the soil carbon content of 0 to 10 cm layer increases with the growth of forest age.(3)The vegetation carbon density of different age groups of Mordauga Forestry Bureau is between 35.539t/hm~2and 91.597t/hm~2;the vegetation carbon density of different age groups of Jinhe Forestry Bureau is between 15.606t/hm~2and 37.928t/hm~2;the vegetation carbon density of different age groups of Genhe Forestry Bureau is between 24.517t/hm~2and 35.612t/hm~2,and the carbon density of living standing wood is the largest,accounting for about 90%.The carbon density of vegetation in different age groups basically showed an increasing trend with the increase of forest age.(4)The soil carbon density of 0 to 10 cm layer in each age group accounts for about 50%of the carbon density of soil layer,and the soil carbon density of different age groups basically shows an increasing trend from juvenile forest to mature forest,the soil carbon density of mature forest is slightly higher than that of overripe forest,and the soil carbon density of the same age group decreases with the increase of soil thickness.(5)The average carbon density of forest ecosystems in different age groups of Moldauga Forestry Bureau was 175.623t/hm~2,the average carbon density of forest ecosystems in different age groups of Jinhe Forestry Bureau was 241.822t/hm~2,the average carbon density of forest ecosystems in different age groups of Genhe Forestry Bureau was 235.609t/hm~2,and the distribution of carbon density of each component of forest ecosystems in the same age group was:soil layer>living standing>litter layer>understory vegetation layer,The average carbon density of forest ecosystems in different age groups of each forestry bureau is as follows:Jinhe Forestry Bureau>genhe Forestry Bureau>Mordauga Forestry Bureau.(6)The forest ecosystem carbon storage of the Mordauga Forestry Bureau is 75.859×10~6t;the forest ecosystem carbon storage of the Jinhe Forestry Bureau is 111.104×10~6t;the forest ecosystem carbon storage of the Genhe Forestry Bureau is 124.194×10~6t,and the carbon storage of the Forestry Bureau is as follows:Genhe Forestry Bureau>Jinhe Forestry Bureau>Mordauga Forestry Bureau.