LUO Lanhua,WANG Cuihong,XIE Hongxia,et al.Study on Vertical Differentiation of Anti-Erodability of Soil Developed from Granite Weathering in Dawei Mountain[J].Research of Soil and Water Conservation,2018,25(01):62-65,71.
大围山花岗岩风化物发育土壤抗蚀性垂直分异
- Title:
- Study on Vertical Differentiation of Anti-Erodability of Soil Developed from Granite Weathering in Dawei Mountain
- 分类号:
- S157.1
- 摘要:
- 为了研究花岗岩风化物发育土壤抗蚀性垂直分异特征，以湖南省浏阳市大围山花岗岩风化物发育而成的山地土壤为例，选取了土壤的有机质、团聚状况、团聚度、分散率、> 0.25 mm水稳性团粒含量五项抗蚀性指标以及采用EPIC模型计算出土壤的可蚀性K值，对土壤抗蚀性垂直分异特征进行了研究。结果表明：大围山花岗岩风化物发育土壤团聚状况和团聚度随海拔高度的升高呈现递减的趋势，趋势较为显著；土壤分辨率随海拔高度的升高而增大，趋势不显著；有机质含量和 > 0.25 mm水稳性团粒含量与海拔相关性很小；土壤可蚀性K值随海拔高度的升高而增大，趋势较显著。大围山花岗岩风化物发育的土壤抗侵蚀能力弱，容易被侵蚀，但因土壤所处地貌部位、山地土壤类型以及植被覆盖情况的不同而产生差异。总体上随海拔高度的升高土壤抗蚀性呈现递减的趋势，但趋势不显著。
- Abstract:
- In order to study the vertical differentiation of anti-erodability of soil developed from granite weathering, we collected soil samples developed from granite weathered materials in Dawei Mountain Liuyang City, Hu’nan Province. The soil organic matter, agglomeration status, agglomeration degree, dispersion rate and > 0.25 mm water stable aggregate content were selected and soil erodibility K value was calculated by EPIC model to study vertical differentiation characteristics of soil anti-erodability. The results showed that with increasing altitude, the soil agglomeration status, agglomeration degree and soil erodibility K value increased, the trend was significant; the soil dispersion rate increased, the trend was not significant; and the content of organic matter and > 0.25 mm water stable aggregate content had little correlation with altitude. The anti-erodability of soil developed from granite weathering in Dawei Mountain was weak, and the soil is easy to be eroded, but erodability was different due to the different physiognomy positions, soil types and vegetation coverage. In general, the soil anti-erodability showed a decreasing trend with the increase of altitude, but the trend was not significant.
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备注/Memo
收稿日期:2017-4-7;改回日期:2017-5-31。
基金项目:国家自然科学基金项目（41371184）；湖南省教育厅科研项目（13C386）；气象防灾减灾湖南省重点实验室创新团队项目
作者简介:罗兰花(1995-),女,湖南省衡阳人,湖南农业大学资源环境学院在读本科生。E-mail:13007499487@163.com
通讯作者:谢红霞(1973-),女,湖南省岳阳人,副教授,研究方向为区域水土保持、环境遥感与GIS。E-mail:xiehongxia136@sina.com