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The Spatial Distribution and Affecting Factors of Soil Organic Carbon Density of Forest in Jinggangshan

Author: GuoJianMing
Tutor: ZhengBoFu；LiJunSheng
School: Nanchang University
Course: Environmental Engineering
Keywords: Climate Change Soil organic carbon Spatial distribution Impact Factor Jinggangshan
CLC: S714
Type: Master's thesis
Year: 2011
Downloads: 79
Quote: 0
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Abstract


Soil organic carbon pool in particular, small changes of forest soil organic carbon pool may cause significant changes in atmospheric carbon dioxide concentration, thus affecting global climate change. Forest soil organic carbon pool dynamics change and regulation mechanism of Jinggangshan Nature Reserve five major forest type soil predict and control the global climate change, an important basic work for the study, analyzed five The spatial distribution of forest soil organic carbon density characteristics, comparative analysis of the evergreen broad-leaved forest and the artificial fir forest soil organic carbon density altitude, mean annual temperature, the correlation between the difference in annual rainfall, pH, slope. The results show that: (1) Nature Reserve Jinggangshan all 36 survey sample point 0-10 cm surface soil organic carbon density ranged between 2.82-7.43 kg/m2, the average density of 5.05 kg/m2; 0 to 100 cm layer of dielectric 9.92 ~ 32.33kg/m2 average density of 21.36 kg/m2 (2) the Jinggangshan evergreen broad-leaved forest soil organic carbon density was significantly higher than artificial Chinese fir pubescens soil organic carbon density minimum. 0-10cm layer undergrowth average soil organic carbon density of five forest types in the order of: the mixed coniferous gt; evergreen broadleaf forests gt; Magnolia forest gt; the artificial fir forest gt; pubescens; 11-20 cm layer ,21-30 cm layer ,31-60 cm layer of average soil organic carbon density of the size of the order are: evergreen broad-leaved forest gt; mixed coniferous gt; artificial Chinese fir gt; Magnolia forest gt; pubescens; while 61 ~ 100 cm layer in order to average soil organic carbon density: evergreen broadleaf forests gt; the mixed coniferous gt; Magnolia forest gt; the artificial fir forest gt; pubescens. (3) Jinggangshan Nature Reserve evergreen broad-leaved forest, artificial fir forest, Magnolia forest, mixed coniferous pubescens soil organic carbon density increase with soil depth decreases, the size of the order are: 0 to 10 cm layer gt; 11 to 20 cm layer gt; 21 ~ 30 cm layer, 31 ~ 60 cm layer gt; 61 ~ 100 cm layer; Jinggangshan Nature Reserve evergreen broadleaf forest, of artificial fir forest soil organic carbon density with longitude increase increase increase with increasing latitude soil organic carbon density increasing from west to east, from south to north, and soil organic carbon density by increasing south to north trend more apparent than the increasing trend from west to east. (4) the evergreen broad-leaved forest soil organic carbon density is reduced with increasing altitude increases, the rise with altitude the artificial fir forest soil organic carbon density increased reduction: evergreen broad-leaved forest soil organic carbon density with annual average temperature rose significantly increase, increase and then reduce the the artificial fir forest soil organic carbon density with an average annual temperature rise is reduced; evergreen broad-leaved forest soil organic carbon density with the increase in annual rainfall significantly reduced, while artificial fir forest soil organic carbon density with annual rainfall increased first reduce and then increase; evergreen broad-leaved forest soil organic carbon density decreases and then increases with the increase of slope decreased further with the Sui and the artificial fir forest soil organic carbon density slope gradient first increases and then decreases again increase; no obvious correlation between the evergreen broad-leaved forest and of artificial fir forest soil organic carbon density pH value; Jinggangshan Nature Reserve forest soil organic carbon content and soil bulk density was significantly negative correlation.

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CLC: > Agricultural Sciences > Forestry > Forestry basic science > Forest soil science
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