| 武琳慧,邵玉琴,鲁槚银,曹伟伟,赵 吉.乌梁素海湿地过渡带土壤微生物类群数量与分布特征[J].农业环境科学学报,2014,33(4):759-764. |
| 乌梁素海湿地过渡带土壤微生物类群数量与分布特征 |
| Soil Microbes and Their Distribution in Wuliangsuhai Wetland |
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| DOI：10.11654/jaes.2014.04.020 |
| 中文关键词: 湿地土壤 稀释平板法 土壤微生物 数量 分布 |
| 英文关键词: wetland dilution plate method soil microorganisms quantity distribution |
| 基金项目: |
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| 中文摘要: |
| 为探明内蒙古乌梁素海湿地土壤微生物主要类群的分布特征，选取湿地过渡带典型植被包括芦苇、碱蓬、白刺3种不同的植物群落，在小河口和退水处设两条平行样带，采用平板计数法对湿地土壤中细菌、真菌和放线菌的数量、组成和分布特征进行了研究。结果表明，不同群落下土壤微生物类群数量和分布明显不同，而且优势类群明显。好气性细菌在小河口芦苇土壤中最多，芽孢型细菌在对照的周边农田土壤中最多，放线菌和真菌在白刺土壤中最多。常年积水的芦苇群落土壤中细菌占主导，季节性淹水的白刺群落土壤中放线菌和真菌数量明显增加，微生物组成结构随环境因子的变化而改变。土壤芽孢型细菌、真菌和放线菌与土壤全氮含量显著相关，说明土壤氮素是调节湿地生态系统土壤微生物代谢及物质转化的关键因子之一。 |
| 英文摘要: |
| Wuliangsuhai wetland is the largest wetland on the same latitude in the world, and plays important roles in maintaining ecological functions of its surrounding area. In the present study, community structure of bacteria, fungi and actinomycetes were profiled in three types of wetland soils and a farmland soil grown with Phragmites australis, Suaeda salsa, Nitraria tangutorum and Helianthus annuus, respectively, from Wuliangsuhai wetland. Bacteria were dominant, while fungi minor in all soils. Quantities of microorganisms were different under different types of plants. The largest number of bacteria was found at Phragmites australis soil of Xiaohekou site, whereas fungi and actinomycetes were the most abundant in Nitraria tangutorum soil. Farmland soil had the highest spore-forming bacteria. The results indicate that the distribution of microbes in soil is closely related with vegetation type and soil nutrients. |
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