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在2009年、2010年和2011年的10月,研究了位于鄱阳湖主湖区南部的南矶山湿地的南荻(Triarrhena lutarioriparia)群落、灰化薹草(Carex cinerascens)群落和狗牙根(Cynodon dactylon)群落下的土壤垂直剖面的细菌群落结构,采用末端限制性片段长度多态性(T-RFLP)分析方法,以及主成分分析、细菌群落-土壤因子相关分析和典范对应分析方法,探究细菌群落结构变化规律及其影响因素。结果表明,南矶山湿地土壤细菌群落结构年变化显著,2011年10月的土壤细菌群落显著不同于2009年和2010年的10月;其次影响土壤细菌群落结构分布的是植物群落类型,在同一年内,狗牙根群落的土壤细菌群落显著不同于灰化薹草群落和南荻群落;而0~45 cm深度的土壤细菌群落结构无深度差异。尽管湿地土壤总磷含量显著影响土壤细菌群落的年际分布,各植物群落土壤总有机质含量、总有机碳含量、总氮含量和含水量都显著影响其土壤细菌群落结构,但仅能解释细菌群落结构变化的11.6%。
In 2009, 2010 and 2011, the community of Triarrhena lutarioriparia, Carex cinerascens and Cynodon dactylon were studied in the Nanji Mountain wetland in the southern part of the main lake of Poyang Lake. The bacterial community structure under vertical soil profile was analyzed by T-RFLP, principal component analysis, bacterial community-soil factor correlation analysis and canonical correspondence analysis to explore the bacterial community structure Variation and Influencing Factors. The results showed that the annual bacterial community structure changed significantly in Nanji Mountain Wetland, the soil bacterial community in October 2011 was significantly different from that in 2009 and 2010, and the second was the type of plant community that affected the distribution of soil bacterial community structure. During the year, the soil bacterial community of Bermudagrass community was significantly different from that of A. septempunctata community and N. nigra community. However, there was no significant difference in the bacterial community structure at 0-45 cm depth. Although total phosphorus content in wetland soil significantly affected the interannual distribution of soil bacterial communities, soil total organic matter, total organic carbon, total nitrogen and total water content significantly affected soil bacterial community structure, but only the bacterial community 11.6% of structural change.