Characteristics of soil anti-erodibility of four hedgerows and different hedgerow zones in the Taihang Mountain slope,China
Study the variation characteristics in soil anti-erodibility of different hedgerows and before,within and after the hedgerow belt of the Taihang Mountain slope,provided scientific support for soil and water conservation and ecological restoration of degraded slopes in the area.Taking Lycium chinense plot(I.c),Cerasus humilis plot(Ch),Mentha canadensis plot(Mc),Forsythia suspense plot(Fs),and bare control plot(Ck)as the research objects,we selected nine indicators about soil anti-erodibility and used the principal component analysis method to conduct soil anti-erodibility evaluation.The result shows that:1)Soil bulk density and erodibility K value of the hedgerow plots were generally lower than those of the bare plot,and the porosity,saturated moisture,nutrient content,soil particle fractal dimension and water stability index were generally higher than those of the bare plot.There were significant differences among the indicators at different positions of hedgerow belts.2)The results of principal component analysis showed that soil bulk density,capillary porosity,saturated water holding capacity,and organic matter were the best indicators for evaluating soil anti-erodibility in the study area.The comprehensive soil anti-erodibility of hedgerows plots was better than that of the bare plot,and the overall performance was Lycium chinense plot＞Forsythia suspense plot＞Cerasus humilis plot＞Mentha canadensis plot＞bare plot,and the soil corrosion resistance within the hedgerow belt was stronger than before and after the belt.3)Soil anti-erodibility index had a significant positive correlation with capillary porosity,total nitrogen,organic matter,and fractal dimension(p＜0.05),and a significant negative correlation with erodibility K value(p＜0.05).In summary,hedgerows can improve soil erosion resistance to a certain extent,and among the four hedgerows,Lycium chinense had a better effect.It is recommended to prioritize the use of Lycium chinense as an ecological restoration species in this area to enhance the soil and water conservation capacity and erosion resistance of the slope.
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