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中文摘要：
应用自控、封闭、独立的生长室系统，研究了川西亚高山岷江冷杉根际土壤微生物数量对查气CO2浓度升高（环境CO2浓度＋350（±25）μmol·mol^-1，EC）和温度升高（环境温度＋2.2（±0.5）℃，ET）及其CO2浓度和温度同时升高（ECT）的响应．结果表明，1）同对照（CK）相比，在6月、8月和10月，EC处理的采际细菌数量分别增加了35％、164％和312％，ET处理增加了30％、115％和209％，而EC和ET处理对根际放线菌和根际真菌数量影响不显著；ECT处理的根际放线菌数量分别增加了49％、50％和96％，根际真菌数量增加了151％、57％和48％，而ECT对根际细菌数量影响不显著．2）3种处理对非根际土壤微生物数量影响均不显著．3）在EC、ET和ECT处理下，微生物总数的根际效应明显，其R／S值分别为1．93、1．37和1．46（CK的R／S值为0．81）．
英文摘要：
With independent and top-enclosed chamber system, this paper studied the responses of culturable bacteria, fungi, and actinomycetes in rhizospheric soil of Abies faxoniana sapling to elevated atmospheric CO2 concentration （ambient ＋ 350 （±25） μmol·mol^-1, EC）, temperature （ambient ＋ 2.2 （±0.5）℃; ET）, and their combination （ECT） under high-frigid conditions of West Sichuan Province. The results showed that in comparing with the control, treatments EC and ET increased the number of rhizospheric bacteria by 35%, 164% and 312%, and 30%, 115% and 209% in June, August and October, respectively, but had little effects on the numbers of rhizospheric actinomycetes and fungi, in treatment ECT, the numbers of rhizospheric actinomycetes and fungi increased by 49%, 50% and 96%, and 151%, 57% and 48% in June, August and October, respectively, while that of rhizospheric bacteria had little variation. EC, ET and ECT had significant effects on the total number of rhizospheric microbes, with the R/S being 1.93, 1.27 and 1.46, respectively, but had little effects on non-rhizospheric microbes.
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