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Inner Mongolia Agricultural University (2020)

Study on Rhizosphere Soil Nutrients and Microorganisms of Cleistogenes Songoria in Desert Grassland under Different Stocking Rates

杨阳;

Titre : Study on Rhizosphere Soil Nutrients and Microorganisms of Cleistogenes Songoria in Desert Grassland under Different Stocking Rates

Auteur : 杨阳;

Grade : Master’s Theses 2020

Université : Inner Mongolia Agricultural University

Résumé partiel
Desert steppe is an unique ecosystem of Eurasia which has the characteristic of most arid but least productivity.Grazing is the most direct,economical and almost the only utilization way for Desert steppe.Stocking rate is the determining factor that affects the productivity,community structure and function of grassland ecosystem.Rhizosphere is the interface of substance exchange and energy flow in plant root-soil-microbial system,which has an important effect on the dynamic of ecosystem nutrients distribution.However,there are few reports about the effects of stocking rate on rhizosphere soil nutrient.Taking the Cleistogenes songoria,a dominant species of Desert steppe,as the object and relying on a long term sheep grazing experiment platform which established in 2004 and including four stocking rate(no grazing,CK ;Light grazing,LG ;Moderate grazing,MG and Heavy grazing,HG),this research studied the effects of stocking on physical and chemical properties as well as microbial community of Cleistogenes songoria thizosphere and non-rhizosphere soil.Simultaneously,we analyzed the relationship between soil environmental factors and microbial community.The aim of this study was to figure out the nutrient difference between rhizosphere and non-rhizosphere soil,and reveal the adaptation strategies and involved mechanisms of Desert steppe species to nutrients poverty and drought

Mots clés : Stocking rate; Cleistogenes songorica; Rhizosphere; Microbial diversity; Soil nutrient;

Présentation (CNKI)

Page publiée le 26 mars 2022