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模拟增温对高寒草甸土壤三大类微生物数量的影响

来源:本站原创 作者:科管处 发布时间: 2017年05月27日

模拟增温对高寒草甸土壤三大类微生物数量的影响

李欣[1]  李峰科1  芦光新1 德科加2  张明2  张东杰3

  1.青海大学农牧学院草业科学系,西宁,8100162.青海省畜牧兽医科学院,西宁,810016

3.海畜牧兽医职业技术学院,湟源,812100

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015cm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)。

关键词:模拟增温;土壤微生物;微生物数量;高寒草甸

中图分类号:S812.2    文献标识码:A     文章编号:1003-7950(2017)02-0006-06

 

Effects of simulated warming on microbial population

in Alpine meadow soil

LI Xin1 etal

(Grassland Department, College of Agriculture and Animal Husbandry, Qinghai University, Xining , 810016)

 

Abstract: This study focused on the effects of temperature enhancement on the number and distribution of soil microorganisms fungi, actinomycete, bacteriain 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 0-15cm soil depth(P < 0.05);Under the condition of simulated warming ,the increased number of bacteria, actinomyces and fungi were mainly occurred in July and August (P < 0.05). But there was not significant effect on microorganisms number in September (P > 0.05).

   Keywords: Simulated warming; Soil microorganism; Microbial population,; Alpine meadow



 


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