北京9个典型板栗园土壤碳代谢微生物多样性特征
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国家自然科学基金资助项目(40771118);北京市科技计划资助项目(D070600304191)


Carbon catabolic diversity characters of 9 chestnut soils in Beijing
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    摘要:

    土壤微生物多样性与土壤质量存在密切联系,也是目前的研究热点。从北京板栗主产区采取9个典型板栗园表层(0—20 cm)土壤,采用BIOLOG生态微平板(BIOLOG Eco PlateTM)分析土壤微生物碳代谢群结构,旨在了解不同板栗园土壤微生物碳代谢功能群结构的特点与差异。结果表明:9个土壤可分为3组:(1)1,6,9号土壤、(2)2,5,7号土壤、(3)3,4,8号土壤。组内土壤微生物碳代谢功能群结构相似,而每组之间有显著性的差异。其中,1,6,9号土壤利用D-羟基丁二酸等7种基质的微生物比较多;而利用葡萄糖-1-磷酸盐等14种基质的微生物比较少,2,5,7号土壤与1,6,9号土壤正好相反,3,4,8号土壤与1,6,9号土壤的相似之处表现在代谢D-羟基丁二酸等7种基质的微生物也比较多,而代谢i-赤藻糖醇、D-木糖、2-羟基安息香酸等基质的微生物比较少。但是,目前对于土壤微生物碳代谢功能群多样性在土壤可持续利用中的作用与意义,特别是与土壤CNP等生物化学过程之间的关系还不清楚。

    Abstract:

    Soil microbial diversity is closely related to soil quality and one of research hotspots in soil science. In this study, 9 surface soils (0—20 cm) were collected from 9 typical chestnut orchard gardens in Beijing. Carbon catabolic diversity of the soils was measured by BIOLOG Eco plate containing 31 substrates. Our aim was to compare the difference in carbon catabolic diversity of the 9 soils. The results showed that the 9 soils could be classified into three groups of (1) soil No. 1, 6 and 9, (2) soil No. 2, 5 and 7, (3) soil No. 3, 4 and 8. The carbon catabolic diversity of the soils in same group was similar, but significant different among each group. Soil No. 1, 6 and 9 had more microbes metabolizing D-malic acid and another 6 substrates, but less in using glucose-1-phosphate and another 14 substrates. In contrary, soil No. 2, 5 and 7 had a reverse pattern of metabolizing the 31 substrates. Soil No. 3, 4 and 8 had similarity in using D-malic acid and another 6 substrates, but much less microbes in using i-erythritol, D-xylose, 2-hydroxy-benzoic acid. Currently, we have less knowledge on the roles and importance of carbon catabolic diversity in soil sustainable management. Further work may be particularly necessary to understand the links of this functional diversity of soil microbial community with soil microbiological processes of C, N, P transformation.

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曹均,吴姬,赵小蓉,李贵桐,孙明德,曹庆昌,林启美*.北京9个典型板栗园土壤碳代谢微生物多样性特征.生态学报,2010,30(2):527~532

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