草业学报2016，Vol.25Issue(11)：173-177,5.DOI:10.11686/cyxb2016090
东祁连山高寒草地几种禾本科牧草根际促生菌研究
The study of plant growth promoting rhizobacteria (PGPR)from several Poaceous species in the East Chi-lien Mountains of China
摘要
Abstract
This research studied the quantity and distribution of bacteria in the rhizosphere of seven Poaceous species from the east Chi-lien Mountains.The research employed a cultivation method,and mainly studied ni-trogen fixing bacteria.It was found that there were large numbers of bacteria in rhizospheres of all 7 plant spe-cies studied.The total number of rhizosphere bacteria counted ranged from 2.5×10 6 cfu/g to 17.07×10 6 cfu/g,with Agropyron cristatum and Leymus secalinus having the lowest rhizosphere nitrogen-fixing bacterial pop-ulations and Poa alpigena having the highest,with the other 4 species intermediate.A total of 201 nitrogen-fixing strains were isolated from the 7 grass species studied.The quantity of bacteria and PGPR present a dis-tribution trend:“root system surface (RP)>root surface soil (RS)>histoplan or interior of roots (HP)”.关键词
禾草/PGPR/联合固氮菌Key words
grasses/plant growth promoting rhizobacteria (PGPR)/Nitrogen fixing bacteria引用本文复制引用
李建宏,李雪萍,马文文,姚拓,孙建军,蒋永梅,张建贵,师尚礼..东祁连山高寒草地几种禾本科牧草根际促生菌研究[J].草业学报,2016,25(11):173-177,5.基金项目
国家自然科学基金项目（31360584）和农业部国家牧草产业技术体系（CARS-35）项目资助。 （）
