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Effect of Elevated Surface O3 Concentration on Soil Microbial FunctionalDiversity in Wheat Field
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- Author:
- No author available
- Journal Title:
- Chinese Journal of Applied & Environmental Biology
- Issue:
- 2
- DOI:
- 10.3724/SP.J.1145.2012.00309
- Key Word:
- 臭氧浓度升高;麦田;水溶性有机碳;呼吸强度;土壤微生物功能多样性
Abstract： 利用中国臭氧FACE(Free-air O3 concentration enrichment,开放式空气臭氧浓度增高)试验平台,通过测定麦季土壤水溶性有机碳含量、土壤呼吸强度和BIOLOG指标,研究了近地层臭氧浓度升高50％条件下(～70 nmol mol-1),麦田土壤微生物功能多样性的响应.结果发现,臭氧浓度升高F麦田土壤水溶性有机碳含量提高,土壤微呼吸强度增加,平均吸光值显著高于对照(P＜0.05).多样性指数结果显示,臭氧浓度升高对麦田土壤微生物丰富度和优势度指数没有显著影响,但是臭氧处理下均一度指数显著高于对照(P＜0.05)；主成分分析显示,相对于其它碳源,臭氧浓度升高对麦田土壤微生物的糖类物质利用能力的影响最大.研究揭示了1.5倍的近地层臭氧浓度增强了麦田土壤微生物碳源利用能力,特别是非优势微生物.图4表2参23
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