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为探讨汶川地震灾区不同气候区土壤微生物群落功能代谢的变化,采用Biolog-ECO生态板技术,研究了亚热带湿润季风气候和半干旱干热河谷气候未受损区、受损治理区、受损未治理区土壤微生物碳源代谢的多样性变化特征.结果表明,平均颜色变化率(AWCD)在未受损区和受损治理区表现为亚热带湿润季风气候区>半干旱干热河谷气候区,在受损未治理区表现为半干旱干热河谷气候区>亚热带湿润季风气候区,不同气候区内受损未治理区AWCD值均处于最低水平;亚热带湿润季风气候区土壤微生物的碳源利用类型明显多于半干旱干热河谷气候区,在不同气候类型区内碳源利用种类均表现为受损治理区>未受损区>受损未治理区的趋势;不同气候区土壤微生物群落碳源代谢多样性特征差异显著,其中多样性指数和均匀度指数均表现为未受损区>受损治理区>受损未治理区,而受损治理区均具有最高的丰富度指数;土壤微生物群落的碳源代谢特征与土壤养分、地上植被生物量及植被覆盖度具有一定的相关性,表明地震及其次生灾害主要通过对地表植被和土壤环境的作用间接影响土壤微生物群落的碳源利用能力,在不同气候类型区与不同的受损治理情况下土壤微生物群落的碳源代谢特征具有显著差异.
In order to explore the functional metabolism of soil microbial communities in different climatic zones affected by the Wenchuan earthquake, the Biolog-ECO ecological panel technique was used to study the effects of sub-tropical wet monsoon climate and unaffected climate, The results showed that the average color change rate (AWCD) showed in subtropical humid monsoon climate zone> semi-arid dry-hot valley climate zone in intact and damaged areas, Uncontrolled area showed semi-arid dry-hot valley climatic zone> subtropical humid monsoon climate zone, and AWCD values of damaged un-dominated areas in different climatic zones were at the lowest level; soil carbon types in subtropical humid monsoon climate zone were significantly more than those in semi-arid In dry-hot valley climatic zones, the types of carbon source utilization in different climatic zones all showed the trend of damaged areas> undamaged areas> impaired uncontrolled areas; the differences of carbon source metabolic diversity of soil microbial communities in different climatic zones Significant, of which the diversity index and evenness index showed uninjured area> damaged area> damaged area, while damaged area The highest carbon abundance index of the soil microbial communities was related to the carbon source metabolic characteristics of soil microbial communities and soil nutrients, aboveground biomass and vegetation coverage, indicating that the earthquake and its secondary disasters mainly through the surface vegetation and soil environment Which indirectly affected soil microbial community carbon utilization ability. There was a significant difference in the carbon source metabolic characteristics of soil microbial communities under different climate types and different damaged conditions.