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荒漠草原2种植物群落土壤微生物及土壤酶特征

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测定和分析了甘肃省金昌市金川区荒漠草原土壤微生物数量、微生物生物量和土壤酶活性.结果表明:同层土壤3大类微生物(真菌、细菌和放线菌)数量、土壤微生物量碳和氮含量及4类土壤酶(蔗糖酶、脲酶、磷酸酶和过氧化氢酶)活性均表现为盐爪爪(Kalidium foliatum)群落大于骆驼刺(Alhagi sparsi folia)群落,而土壤微生物量磷含量相反;同一植物群落,不同层土壤微生物数量(除骆驼刺群落中的真菌亚表层最高外)、土壤微生物量碳、氮、磷含量及土壤酶活性(除骆驼刺群落中脲酶呈现高-低-高-低趋势外)均呈现随土层的加深而降低的趋势;金川区荒漠草原不同植物群落不同空间层次土壤微生物数量、微生物生物量和各种酶之间有不同程度的相关性.
Characteristics of Microorganisms and Enzyme Activity under Two Plant Communities in Desert Steppe
Soil microbial quantities,microbial biomass and enzyme activity of desert steppe ecosystem under different plant communities in desert steppe in Jinchang,Gansu,China were studied in this paper.The results showed that the changes tendency of soil microbial quantities,microbial biomass C,N and enzyme activity of community dominated by Kalidium foliatum were much higher than that of the community dominated by Alhagi sparsifolia,while the microbial biomass P opposite.The number of soil microbial (bacteria and actinomycetes),microbial biomass (C,N,P) and enzyme activity decreased with the soil depth in vegetation coverage,The soil urease showed a "high-low-high-low" trend and maximum fungus in the subsurface layer of soil in community of A.sparsifolia grassland.Meanwhile,the result of correlation analysis indicated that there were significant correlation among soil microbial quantities,soil microbial biomass and soil enzyme activity.

desert steppesoil microbial quantitiessoil microbial biomasssoil enzyme activityKalidium foliatumAlhagi sparsifolia

马文文、姚拓、靳鹏、王国基、张玉霞

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甘肃农业大学草业学院/草业生态系统教育部重点实验室,甘肃兰州730070

甘肃省金昌市人民政府,甘肃金昌737100

荒漠草原 微生物生物量 微生物数量 土壤酶 盐爪爪(Kalidium foliatum) 骆驼刺(Alhagi sparsifolia)

国家自然科学基金甘肃省农业科技创新项目现代农业产业技术体系项目

30960265GNCX-2012-45CARS-35

2014

10.7522/j.issn.1000-694X.2013.00297

中国沙漠
中国科学院寒区旱区环境与工程研究所

中国沙漠

CSTPCDCSCD北大核心
影响因子：1.504
ISSN：1000-694X
年,卷(期)：2014.34(1)
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