植被恢复边坡土壤抗蚀性及其影响因子耦合协调分析  

Coupling Correlation Analysis of Soil Erosion Resistance and Its Influencing Factors in Vegetation Restoration Slopes

作　　者：谢贤健[1] 苟千陶 XIE Xianjian;GOU Qiantao(School of Geography and Resources Science of Neijiang Normal University,Neijiang 641112,China)

机构地区：[1]内江师范学院地理与资源科学学院,四川内江641112

出　　处：《人民黄河》2024年第5期123-127,共5页Yellow River

基　　金：长江科学院开放研究基金项目(CKWV2017523/KY);国家级大学生创新性实验项目(X2017019)。

摘　　要：为了给边坡植被恢复设计等提供参考和技术支撑,基于内江市境内公路边坡经0、5、7、15、20 a植被恢复的样地野外调查资料,以土壤颗粒(团聚体)平均质量直径和水稳性指数为土壤抗蚀性指标,以土壤粒径≥0.25 mm的大团聚体含量、容重、有机质含量、碱解氮含量、速效磷含量、速效钾含量等6个土壤理化性质指标为土壤抗蚀性影响因子,采用主成分分析、耦合协调度分析等方法,探究不同植被恢复年限的边坡土壤抗蚀性与其影响因子的耦合协调关系,得到以下主要结论:1)不同植被恢复年限的土壤抗蚀性指标及其影响因子具有显著差异,随着植被恢复年限的延长,土壤大团聚体含量和养分含量呈增加趋势,土壤容重呈减小趋势,土壤抗蚀性呈增强趋势;2)碱解氮含量、有机质含量、速效磷含量、大团聚体含量、容重是不同植被恢复年限土壤抗蚀性的主要影响因子;3)土壤理化性质指标中,化学指标(速效磷含量、碱解氮含量、有机质含量、速效钾含量)对土壤抗蚀性的影响大于物理指标(大团聚体含量、容重)的影响,进行植被护坡设计时应当注重有机质和速效肥料的保持;4)土壤理化性质指标与土壤抗蚀性指标的耦合协调度随植被恢复年限的延长而提高,植被恢复15 a时二者的耦合协调类型仍属弱协调、植被恢复20 a时二者的耦合协调类型尚属中度协调,为了进一步改善边坡土壤的理化性质、促进稳定土壤结构的形成、增强土壤抗蚀性,还需更长时间的植被恢复。In order to provide reference and technical support for slope vegetation restoration design,based on field survey data of road slopes in Neijiang City after 0,5,7,15 and 20 years of vegetation restoration,the average mass diameter of soil particles(aggregates)and water stability index were used as soil erosion resistance indicators.The content of large aggregates with soil particle size≥0.25 mm,bulk density,organic matter content,alkaline nitrogen content,available phosphorus content and available potassium content were used as the influencing factors of soil erosion resistance.Principal component analysis and coupling coordination analysis were used to explore the coupling relationship between soil erosion resistance and its influencing factors of slopes with different vegetation restoration years.The main conclusions are as follows:a)There are significant differences in soil erosion resistance indicators and their influencing factors among different vegetation restoration years.With the extension of vegetation restoration years,the content of soil macro-aggregates and nutrients increases,the soil bulk density decreases and the soil erosion resistance increases.b)The content of alkaline nitrogen content,organic matter content,available phosphorus content,macro-aggregate and bulk density are the main influencing factors on soil erosion resistance at different vegetation restoration years.c)Among the soil physical and chemical properties indicators,the chemical indicators(available phosphorus content,alkaline nitrogen content,organic matter content and available potassium content)have a greater impact on soil erosion resistance indicators than that of physical indicators(large aggregate content and bulk density).When designing vegetation slope protection,attention should be paid to the maintenance of organic matter and available fertilizers.d)The coupling coordination degree between soil physical and chemical properties indicators and soil erosion resistance indicators increases with the extension of vegetation

关 键 词：土壤抗蚀性 植被恢复 边坡 土壤理化性质 耦合关联 

分 类 号：S157.1[农业科学—土壤学]