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Northwest A&F University (2020)

Effects of Different Artificial Vegetation Measures on Soil Properties in Mu Us Sand Land

陈闻;

Titre : Effects of Different Artificial Vegetation Measures on Soil Properties in Mu Us Sand Land

Auteur : 陈闻;

Grade : Master’s Theses 2020

Université : Northwest A&F University

Résumé
Mu Us Sandy Land is located in the ecologically fragile zone of semi-arid region in China.Low vegetation coverage and severe wind erosion lead to land degradation in the Mu Us Sandy Land.However,vegetation restoration can effectively inhibit land degradation and improve soil quality of degraded land.Exploring the changes of soil properties under different vegetation restoration is helpful to reveal the evolution process of soil desertification in the Mu Us sandy land,and it is more conducive to the ecological management and restoration of sandy land.In this paper,six typical artificial vegetation(Pinus sylvestris var.Mongolica,Amorpha fruticosa,Medicago sativa,Hedysarum scoparium,Artemisia desertorum,Amygdalus pcdunculata Pall)and bare sand(CK)in the Mu Us sandy land were studied.The changes of soil moisture,nutrients,bulk density,particle composition and soil bacterial community structure in the 0-40 cm soil layer were studied by combining field sampling and indoor analysis.The relationship between vegetation restoration and soil physical,chemical properties and soil bacterial community structure was analyzed.The main research results are as follows :(1)The soil moisture in the sample plots with different vegetation restoration measures gradually increased with the increase of soil depth,and there was significant difference between different vegetation restoration measures and the control bare sand(p<0.05).The average water content of soil profile at 2m depth in different vegetation restoration sample plotswas lower than that in the control,and the lowest was Pinus sylvestris var.Mongolica sample plot,followed by Medicago sativa,which is 53.3% and43.2% less than the control,respectively.

Mots clés : Mu Us Sandy Land; vegetation restoration; soil moisture; soil nutrients; bacteria;

Présentation (CNKI)

Page publiée le 4 avril 2022