Regulation Mechanism Of Stereocopic Recovery Measure On Soil Microenvironment In Sand

With the increase of global changes and human activities,sand area has increased,and the ecology of the sandy land continues to deteriorate.Therefore,it is necessary to study the restoration of sandy land.However,most researches on ecological restoration of sandy land focus on the evaluation of restoration effects,and there is a lack of discussion on ecological restoration mechanisms.The restoration of the soil microenvironment is the main content and foundation of the ecological restoration of sandy land.Soil moisture,temperature and nutrients are the core factors of the soil microenvironment.This study uses the complementary functions of lignin and polyacrylamide super absorbent resin to form stereoscopic recovery measure in soil shallow and surface layers.By analyzing the effects of the control(Cont),super absorbent polymers(SAP),lignin crust(Crust),and stereoscopic recovery measure(Step)on the soil moisture,soil temperature and nutrients,the regulation mechanism of stereoscopic recovery measure on the soil microenvironment is studied.The main conclusions of this article:1.Recovery measure can control soil moisture,among which stereoscopic recovery measure have the best regulation effect and influence the spatiotemporal distribution of soil moisture by affecting plants,soil factors,soil evaporation and soil infiltration processes.2.Stereoscopic recovery measure can reduce or increase soil temperature by increasing soil heat capacity and soil thermal conductivity,thereby avoiding high or low temperature damage to biological communities.3.Stereoscopic recovery measure reduce soil nutrient erosion and increase the positive feedback of plant factors,microbial factors and soil physical factors,so as to achieve soil nutrient enrichment.