DENG Piao-yun,CHEN Jian-guo,YAN Wen-de.Spatial Distribution of Soil Organic Carbon Density and Their Controlled Mechanism on Longshan Segment in Wuling Mountain[J].HEILONGJIANG AGRICULTURAL SCIENCES,2017,(08):35-39.[doi:10.11942/j.issn1002-2767.2017.08.0035]
武陵山脉龙山段土壤有机碳密度分布及控制机制
- Title:
- Spatial Distribution of Soil Organic Carbon Density and Their Controlled Mechanism on Longshan Segment in Wuling Mountain
- 文章编号:
- 1002-2767（2017）08-0035-05
- Keywords:
- soil organic carbon density; the northwest of Hunan province; spatial distribution; mountainous region
- 分类号:
- S153.6
- 文献标志码:
- A
- 摘要:
- 为了探究山地地貌背景下土壤有机碳密度的分布规律及影响因子，以湘西北龙山县土壤有机碳(0～100 cm土层)为研究对象，对其密度及储量进行了研究。运用ArcGIS空间插值法估算了该县土壤有机碳密度的空间分布格局并利用Surfer软件绘制有机碳密度地形空间分布图。结果表明：龙山县0～100 cm土层土壤有机碳储量为30 537.07×109 g，平均有机碳密度达10.61 kg?m-2，略高于全国平均水平（9.60 kg?m-2）。研究区有机碳密度以位于境内两条山脉西北坡的山原最高，龙山主脉山脊、紧接河谷的中低山山地有机碳密度次之，河谷开阔地与山地之间的缓坡地带土壤有机碳密度再次，龙山主脉两侧河谷开阔地带最低。山脉东西坡水热条件的差异是东西坡土壤有机碳密度差异的根本原因；人为因素的影响导致旱耕地土壤有机碳密度低于山地土壤。
- Abstract:
- In order to study distribution law and influencing factors of soil organic carbon density in mountain,the soil organic carbon density and storage were investigated in Longshan county,in northwest Hunan province.The distribution pattern of soil organic carbon density was estimated in ArcGIS spatial interpolation and the distribution map of soil organic carbon density based on topography was drawn in Sufer software.The results showed that soil organic carbon storage was 30 537.07×109 g in Longshan county,and the average organic carbon density of 0~100 cm soil profile reached 10.61 kg?m-2,being slightly higher than the national average level (9.60 kg?m-2).As for the soil organic carbon density of 0~100 cm soil profile in areas investigated,the highest is in the mountain plateau located in northwest slope of Longshan mountain range and the Boundary mountain,the second is in the Longshan mountain ridge and the medium-low mountain area close to the valleys,the third is in the zone of the gentle slope between the open valley and the steep slope of medium- low mountain,and the lowest is in the open valleys lied in both sides of Longshan mountain range.It is the different hydro-thermal condition between the eastern and western slope of the main mountain range that caused the difference of soil organic carbon density; Due to the human disturbance,the soil organic carbon density of dry farmland was lower than that of mountainous region.
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备注/Memo
收稿日期：2017-06-01基金项目:国家林业公益性行业科研专项资助项目（201404316）；湖南省科技重点研发计划（农业支撑领域）资助项目（2015NK3025）；湖南省优势重点学科资助项目 第一作者简介：邓飘云（1989-），女，湖南省邵阳市人，硕士，助理工程师，从事森林资源资产评估工作。E-mail:dengpiaoyun@163.com。