土壤微生物对荒漠草原一年生和多年生牧草生长发挥的效应

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中图分类号：S812 文献标识码：A 文章编号：1007-0435（2026）01-0061-14

Abstract：The exploration of the mutual relationships between soil microorganisms and diferent types of for ages in desert steppes is crucial for maintaining and restoring desert steppe ecosystems.In this study，perennial forages [Stipa breviflora Griseb，S. glareosa P. Smirn，S. krylovii，Cleistogenes songorica （Roshev）Ohwi] and anual forage[Neopallasia pectinata （Pall）Poljak] in desert steppes were taken as the research objects to analyze the enhancement efects of soil microbial concentration on diffrent species of forages.The results showed that：（1） Soil microbial concentration exerted a neutral efect on the growth of perennial forags，mainly due to the mutual ofset between the negative efects of bacteria Sphingomonas and fungi Dominikia and the positive effects of bacteria norank_f_Longimicrobiaceae and fungi Rhizophlyctis on their growth.（2） Soil microbial concentration exerted an inhibitory effect on the growth of annual forage Neopallasia pectinata，and this effect intensified with the increase in microbial quantity.Soil microbialα diversity，Gemmatimonadaceae， Coprinopsis，Fusariuminrhizosphericsoil，andRubrobacter，Peziza innon-rhizosphericsoilallshowed ihibi tory effects on its growth（ P<0.05） . The analysis of key microbial groups provides a theoretical basis for subsequent related microbial studies， so as to enhance the growth stability of forages in desert steppes.

Key words：Soil microorganism; Desert steppe;Annual forage;Perennial forage;Enhancement effect

内蒙古荒漠草原地处典型的荒漠草原地带，是中国北方草地主要组成部分之一，能够遏制风沙东扩，保卫草原畜牧业稳定发展[1-2]。（剩余22992字）