Study On Carbon Storage Of Main Forest Types In Minjiang On The Bank Of The Estuary

Focusing on the forest region of upper reaches of estuary coast in Minjiang,the paperresearched carbon storage on the main forest in Minjiang estuary through methods fieldinvestigation and forest resources inventory data. The main research contents and resultswere as follows:(1) This article calculated forest vegetation carbon storage and density by biomassalgorithm for analyzing the forest vegetation carbon storage and carbon density spatialdistribution characteristics from the different vegetation types, different origins anddifferent age groups: reserves total vegetation carbon was150513.53t, the average carbondensity was28.76t/hm2.Coniferous forest, broad-leaved forest, coniferous andbroad-leaved mixed forest carbon stocks were37141.29t,53834.72t,59537.52t, carbondensity were14.88t/hm2,32.42t/hm2,55.32t/hm2. The forest carbon density of thedifferent origin show that natural forest carbon density greater than plantation forest carbondensity. The carbon storage of the different age in ascending order as follows: middle ageforest> young forest>nearly ripe forest> mature forest, this have a great relationship withthe distribution area of forest types in each age group, the carbon sequestration capacityand the carbon density increases with the increase of age class.(2) Based on the field investigation results, the article calculated the content oforganic carbon in the soil, and calculated the organic carbon density and carbon storageof the soil: With the deepening of the soil layer, soil organic carbon content graduallydecreased. When the soil depth was greater than40cm, soil organic carbon content declinessharply; when the soil depth was greater than80cm, soil organic carbon content was verylow, between0.11g~0.33g. Mixed forests> Soft broad-leaved forest> Casuarinaequisetifolia Forst.>Hard hardwood forest>Betula L.> Cunninghamia lanceolata> Celtistimorensis Span.> Eucalyptus robusta Smith> Pinus elliottii Engelm.> Pinus massonianaLamb.The average soil carbon density was81.95t/hm2,the total carbon storage was428830.55t. The largest carbon storage density was mixed forest, and the least one wasconiferous forest between59.93t/hm2and144.06t/hm2. (3) In central and northern mountain area, some regional carbon density was between150t/hm2and250t/hm2, and shows rising from east to west. In central and northernmountainous areas, some area high carbon density in150t/hm2~250t/hm2, Causes offorest ecosystem carbon density was higher away from human living area is less humandisturbance, It iwas conducive to the conversion of forest carbon cycle. Reserves of theforest ecosystem carbon was579344.08t, The vegetation layer (tree) of carbon storage was150513.53t, Soil carbon storage was428830.55t, accountting for25.98%,74.02%of totalcarbon storage, showing the soil layer was larger than the vegetation layer. Vegetationcarbon density was between14.88t/hm2and55.32t/hm2, soil carbon density is between59.93t/hm2and144.06t/hm2, Soil carbon density was2.85times the average vegetationcarbon density. Soil carbon reserves accumulation plays an important role in forestecosystem carbon sink function.(4) Finally, according to the principle of density effect and the results of the survey,this study compiles the pinus massoniana plantation of carbon management, and expoundsits application methods.