| We analyzed the organic carbon storage and carbon sequestration value of vertical distribution (tree layer, shrub layer, herb layer, litter layer and soil horizon) of four main types of forest ecosystems (Larix principis-rupprechtii Mayr, Pobulus davidiana, Betula platyphylla Suk, and Pinus tabuliformis) in Liaoheyuan, and evaluated the influence physicochemical property of soil and meteorological posed on the organic carbon storage of ecosystems, in order to offer scientific basis and theoretical foundation for relevant studies. Major results were summarized as follows:(1) Of the four main types of forest ecosystems, organic carbon storage in Larix principis-rupprechtii Mayr reaches the maximum, arriving at 352.66 t?hm-2, and Betula platyphylla Suk, Pobulus davidiana and Pinus tabuliformis are 298.00 t?hm-2, 269.84 t?hm-2, 220.66 t?hm-2 respectively; In the organic carbon storage, soil horizon store a maximum of 53.52 percent of total, and tree layer, litter layer, shrub layer, and herb layer are 36.73%, 8.24%, 1.34%, and 0.29% respectively.(2) In tree layer, Larix principis-rupprechtii Mayr store a maximum of organic carbon storage, arriving at 113.63 t·hm-2, Pobulus davidiana, Betula platyphylla Suk, and Pinus tabuliformis are 112.62 t·hm-2, 108.64 t·hm-2, 80.50 t·hm-2 respectively; In shrub layer, organic storage of Betula platyphylla is the most, reaching 6.13 t·hm-2, Pinus tabuliformis, Larix principis-rupprechtii Mayr, and Pobulus davidiana are 3.72 t·hm-2, 2.55 t·hm-2, 2.31 t·hm-2 respectively; In herb layer, organic carbon storage in Betula platyphylla Suk reaches the maximum, arriving at 0.83 t·hm-2, Larix principis-rupprechtii Mayr, Pinus tabuliformis, and Pobulus davidiana are 0.48 t·hm-2, 0.42 t·hm-2, 0.39 t·hm-2; In litter layer, Larix principis-rupprechtii Mayr store a maximum of organic carbon storage, arriving at 36.37 t·hm-2, Pobulus davidiana, Pinus tabuliformis, and Betula platyphylla Suk are 25.04·hm-2, 119.86 t·hm-2, 12.68 t·hm-2 respectively; In soil horizon, organic storage of Larix principis-rupprechtii Mayr is the most, reaching 199.24t·hm-2, Betula platyphylla, Pobulus davidiana and Pinus tabuliformis are 169.72 t·hm-2, 129.48 t·hm-2, 116.16 t·hm-2 respectively.(3) The organic carbon storage of Larix principis-rupprechtii Mayr, Pobulus davidiana, Pinus tabuliformis, and Betula platyphylla Suk are 95200 Yuan/ hm-2, 73200 Yuan/ hm-2, 79300 Yuan/ hm-2, 60300 Yuan/ hm-2 respectively based on the afforestation cost method, and 0.3613 million Yuan/ hm-2, 0.2765million Yuan/ hm-2, 0.3053 million Yuan/ hm-2, 0.2261million Yuan/ hm-2 measured by carbon tax method.(4) In the combination of soil physical properties of four main types of forest ecosystem, soil total porosity percent, field moisture capacity, and saturation moisture content were the most important reasons for the organic carbon storage by means of regress analyzing. Particularly, saturation moisture content was the single strongest influence on the organic carbon storage of tree layer; capillary porosity had greatest impact on that of herb layer and shrub layer; volume weight was the key factor in affecting that of litter layer. In the consideration of chemical properties of soil, total K, rapidly available phosphorus, and organic content were selected to influence organic carbon storage. To be specific, total K was the single most important factor in determining organic carbon storage of tree layer; rapidly available phosphorus played a crucial role in deciding that of shrub layer and litter layer; total N was the most important reason for that of herb layer.(5) Combined with the meteorological data of recent 30 years, annual surface temperature was selected to determine the organic carbon storage of Larix principis-rupprechtii Mayr by means of regress analyzing. In the same way, the key factor in determining organic carbon storage of Pobulus davidiana, Betula platyphylla Suk, and Pinus tabuliformis was year of vaporize mete, Evaporation annual, and annual precipitation.
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