Carbon Storage And Density Of Artificial Pinus Tabulaeformis Forest In Ziwuling Area

As CO₂ and other greenhouse gas increasing, great changes have been taken by global warming, which caused a series ecological and environmental problems. It is one of important task to retard the climate change for ecological environment. Furthermore, forest ecosystem plays an important role for climate warming. So it is the essential to clarify the existing forest ecosystem carbon storage and density. This paper had chosen artificial Pings tabulaeformis forest in Ziwuling area of Loess Plateau. Using inventory and laboratory analysis, we studied carbon storage and its density distributing characteristics in spatial growth scales, which may provide basic information to research carbon storage and its potential for the whole Ziwuling forest ecosystem. Main findings are as following:1. The mean carbon content of vegetation was 0.4604. Carbon rate of tree layer was 0.5228; shrub was 0.4622, which rate of change was between 0.4784 and 0.4448 in different types of shrubs; the rate of herb layer was 0.3926, and different type of herbs carbon rate was between 0.3480 and 0.4748.2. Vegetation carbon density and carbon storage were: 47.85 t/hm² and 2.2242 Tg. Carbon density of the tree layer was 30.37 t/hm² and its carbon storage was 1.4118 Tg. Furthermore, great changes had taken place from 10.10 to 2.28 t/hm² for in carbon density, and from 0.4695 to 0.1058 Tg for carbon storage. Shrub carbon density and storage were 8.56 t/hm² and 0.3980 Tg. The same as vegetation layer, different types of shrubs density and storage had obviously difference among them, such as 3.88 t/hm² and 0.1805 Tg for Hippophae reamnoides, 1.55t/hm² and 0.722 Tg for Rubus corchorifolius, 12 t/hm² and 0.1452 Tg for Euonymus. Besides, carbon density and storage of herb layer were 8.91 t/hm² and 0.4144 Tg, and the order was following: Carex lanceolata, Bothriochloa ischemum, Comarum var. sinica, Elymus dahuricus, A.sacrorum, Anemone hupehensis. These herbs carbon density was between 0.26 and 2.28t/hm², and the storages were between 0.0121 to 0.1061 Tg.3. Carbon density of litter was 22.88t/hm², and had taken up to 13.91% of whole forest density. Meanwhile, litter carbon stock was 1.0638 Tg. Soil carbon density was 9.38 kg/m², which was account for 57.01% of the total forest. Besides, sum of soil and litter layer carbon density, the ratio was up to 70.92% of whole forest ecosyst.4. Soil carbon storage was 4.3617 Tg, and average carbon density was 9.38 kg/m². With depth of soil, organic carbon density decreased dramatically. In 0-50cm depth of soil, carbon density of sunny slope was more than shady, but contrast in 50-90cm depth. This may result from human disturbance. Therefore, it is clearly seen that human disturbance has tidy relationship for carbon distribution and size of forest ecosystem.