【摘要】 采用野外模拟增温(OTC)方法,研究了模拟增温对高寒草甸土壤三大类微生物数量和分布的影响。结果表明:增温有利于增加三大类群微生物数量,增加百分比从大到小依次为:细菌>放线菌>真菌;增温对0~15cm土层中三大类群微生物数量增加明显(P<0.05);增温对细菌、放线菌和真菌数量的增加主要集中于7月份和8月份(P<0.05),9月份增温对三大类微生物数量的影响不显著(P>0.05)。更多还原

【Abstract】 This study focused on the effects of temperature enhancement on the number and distribution of soil microorganisms(fungi,actinomycete,bacteria) in alpine meadow soils at Qinghai University-Tsinghua University Sanjiangyuan grassland ecological environment monitoring and positioning station by adopting the method of simulated warming with Open-top chambers(OTCs).The results showed that temperature enhancement is beneficial to increase the number of soil microorganisms(fungi,actinomycete,bacteria,and the order of percentage increasing in the number was bacteria>actinomycetes>fungi;Temperature enhancement significantly increased the number of soil microorganisms within 0~15 cm soil depth(P<0.05);Under the condition of simulated warming,the increased amount of bacteria,actinomyces and fungi were mainly occurred in July and August(P<0.05).But there was not significant effect on microorganisms amount in September(P>0.05).更多还原