裸露砒砂岩区不同植被类型土壤团聚体稳定性与抗蚀性能  

Soil Aggregate Stability and Erodibility in Different Vegetation Types of Exposed Feldspathic Sandstone Region

作　　者：杨振奇 郭建英[1,2] 秦富仓[3] 刘铁军 刘艳萍[1,2] 邢恩德[1,2] Yang Zhenqi;Guo Jianying;Qin Fucang;Liu Tiejun;Liu Yanping;Xing Ende(Yinshanbeilu National Field Research Station of Desert Steppe Eco-hydrological System,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Institute of Water Resources for Pastoral Area of the Ministry of Water Resources of China,Hohhot,Inner Mongolia 010020,China;Desert Science and Engineering College,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010018,China)

机构地区：[1]中国水利水电科学研究院内蒙古阴山北麓荒漠草原生态水文野外科学观测研究站,北京100038 [2]水利部牧区水利科学研究所,内蒙古呼和浩特010020 [3]内蒙古农业大学沙漠治理学院,呼和浩特010019

出　　处：《水土保持通报》2021年第3期8-14,共7页Bulletin of Soil and Water Conservation

基　　金：国家自然科学基金项目“砒砂岩区裸露基岩—土壤复合坡面侵蚀过程研究”(41967008);内蒙古科技计划项目“黄河流域脆弱地质区防蚀控沙生态综合治理技术”(20200GG0126)。

摘　　要：[目的]研究裸露砒砂岩区鲍家沟小流域不同植被类型土壤团聚体特征与可蚀性,为植被建设和减轻入黄泥沙提供科学指导。[方法]运用Le Bissonnais法和崩解法研究裸露砒砂岩区不同植被类型土壤团聚体稳定性特征与可蚀性。[结果]①慢速湿润处理条件下,土壤结构中以2 mm以上的团聚为主,预湿扰动处理条件下,2 mm以上的团聚体占14.79%~40.17%,快速湿润处理条件下2 mm以上团聚体含量占4.69%~15.11%。②土壤团聚体的破坏率呈现:裸地>草地>油松林>山杏林>柠条林>沙棘林的趋势。③裸露砒砂岩区土壤的可蚀性K值在0.045~0.092之间,各植被类型土壤的崩解速率在0.48~1.38 g/min之间。[结论]沙棘等人工植被能够显著增强土壤团聚体结构的稳定性,降低土壤的可蚀性,提升土壤的抗蚀性能,从而有效削减侵蚀产沙过程。[Objective]The soil aggregate stability and soil erodibility in different vegetation types of exposed feldspathic sandstone regions in the Baojiagou watershed were studied in order to provide scientific guidance for vegetation construction and reducing coarse sand into the Yellow River.[Methods]Soil aggregate stability and soil erodibility in different vegetation types were evaluated by using the Le Bissonnais method.[Results]①Under the conditions of the slow-wetting treatment,soil structure was dominated by 2 mm and larger aggregates.Under the conditions of the pre-wetting disturbance treatment,the proportion of 2 mm and larger aggregates was 14.79%~40.17%.Under the conditions of the fast-wetting treatment,the content of 2 mm and larger aggregates was 4.69%~15.11%.②The destruction rate of soil aggregates was influenced by vegetation,and followed the order of bare land>grass land>Pinus tabuliformis forest>Prunus armeniaca forest>Caragana korshinskii forest>Hippophae rhamnoides forest.③The soil erodibility K value in the exposed soft rock area ranged from 0.045 to 0.092,and the disintegration rate of soil in different vegetation types ranged from 0.48 to 1.38 g/min.[Conclusion]H.rhamnoides and other artificial vegetation can significantly enhance the stability of soil aggregate structure,reduce soil erodibility,improve soil corrosion resistance,and thus effectively reduce erosion and sediment yield processes.

关 键 词：裸露砒砂岩区 Le Bissonnais法 土壤团聚体 土壤抗蚀性能 

分 类 号：S718[农业科学—林学] S157