IMHE OpenIR  > 成都山地所知识仓储(2009年以前)
Alternative TitleResearch on soil organic carbon loss under different slope gradients
賈松偉; 賀秀斌; 韋方強
Corresponding Author賈松偉
Source Publication第五届海峡两岸山地灾害与环境保育学术研讨会暨第六届全国泥石流学术会议
Conference Date2006-7-27
Conference Place云南东川
Funding Organization中国水土保持学会;中国地质学会;中国地理学会;中国青藏高原研究会
Abstract本文通过野外径流社区试验和室内分析,研究了黄土丘陵区坡度对土壤有机碳流失的影响.结果表明,随着坡度的增加(10°~30°),其径流量和侵蚀强度变 化趋势爲:20°>30°>15°>10°>25°,20°是变化的转捩点;土壤有机碳的流失变化趋势与侵蚀强度的变化趋势一致,有机碳的流失主要受社区 侵蚀强度的影响.土壤侵蚀造成了泥沙中有机碳的富集,其5次産流的平均富集比爲2.27~3.74,并且随着侵蚀强度和坡度的增大均减小.土壤有机碳流失 程度随着最大30min雨强I30的增大而增大,与降雨特徵值PI30呈幂函数关系.
Other AbstractBased on field runoff plots and laboratory analysis,the effect of slope gradient oil soil organic
carbon loss was studied on the loess hilly mgion.The results show that with increasing slope gradient,runoffamount
and soil erosion intensivy first increased to a peak value on slope of 20 degrees,then decreased,suggesting that
there exists a critical slope gradient between 20 degrees and 25 degrees.Soil organic carbon loss amount was mainly
influenced by soil erosion intensity,appearing the SⅢile fiend as did soil erosion intensity with increasing slope
gradient.Soil erosion results in the enrichment oforganic carbon in sediment.The average enrichment ratioes offive
mnoffplots vaned from 2.27 to 3.74 for five storm events.and decreased with increasing soil erosion intensity and
slope gradient.The degree ofsoil organic carbon loss increased with increasing maximal 30-min intensity(130),and
was a power function with rainfall characteristics rPl30).
Keyword土壤侵蚀 土壤有机碳流失 坡度 侵蚀强度
Document Type会议论文
Corresponding Author賈松偉
Recommended Citation
GB/T 7714
賈松偉,賀秀斌,韋方強. 不同坡度条件下土壤有机碳流失规律研究[C],2006:722-727.
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