渭北旱塬植被重建区坡面土壤水分变化影响机制分析OA

The ecological environment in the Weibei arid region is fragile,and the vegetation restoration work faces numerous challenges due to harsh site conditions.As a key soil physical property index,soil moisture content affects the activities of soil microorganisms and the decomposition process of or-ganic matter,and is also related to vegetation coverage status and ecological system stability.To clar-ify the impact mechanism of soil moisture content,this study selected 9 impact factors from three as-pects:soil environmental factors,soil nutrient factors and topographic factors,and explored the im-pact of each factor on soil moisture content as well as the correlation among various factors.Mean-while,the partial least squares path model was used for modeling to explore the impact mechanism of impact factors on soil moisture content.The results show that among the various selected factors in the Weibei arid region,there is an obvious correlation between them.Among them,pH value and soil nutrient factors have a relatively large impact on soil moisture content.Further analysis by the partial least squares path model shows that soil nutrient factors explain approximately 51.86％of the varia-tion in soil moisture content,while the pH value explains approximately 7.66％of the variation in soil moisture content.This study effectively separated the driving effects of soil nutrient factors and soil environmental factors on soil moisture content,and explored the intensity and pathway of the interac-tion among various factors,which can provide a theoretical basis for the ecological restoration and construction in this region.