艾比湖湿地氨氧化细菌数量空间分布及其与土壤环境相关性分析

【目的】对新疆艾比湖湿地不同植被类型(柽柳群落、盐节木群落、芦苇群落)和土壤深度(0-5 cm、5 cm-15 cm、15 cm-25 cm、25 cm-35 cm)中氨氧化细菌数量空间分布进行研究,并对其与土壤环境因子的相互关系进行分析。【方法】采用MPN-Griess和Pearson相关分析法。【结果】艾比湖湿地不同植被类型氨氧化细菌的数量存在明显的差异,分布趋势为柽柳群落最高,盐节木群落次之,芦苇群落最低;不同土层中氨氧化细菌的数量也存在明显的差异,分布趋势为15 cm-25 cm>0-5 cm>5 cm-15 cm>25 cm-35 cm;氨氧化细菌数量分布与土壤有机质含量呈显著相关,与土壤pH、含水量、盐度以及氨氮含量等因子之间均无相关性。【结论】艾比湖湿地不同植被类型和不同土层中氨氧化细菌数量的分布均存在显著差异;氨氧化细菌数量的空间分布除与土壤有机质含量呈显著相关外,与其他土壤环境因子均无相关性。

Correlation analysis between the distribution of ammonia-oxidizing bacteria and soil environment in Ebinur Lake Wetland

Objective] In order to study the spatial distribution of ammonia-oxidizing bacteria(AOB) in different vegetation communities(Tamarix ramosissima,Halocnemum strobilaceum,Phragmites australis) and different soil layers(0?5 cm,5 cm?15 cm,15 cm?25 cm and 25 cm?35 cm) of wetland in the Ebinur Lake in Xinjiang.Then explore the correlations between the spatial dis-tribution of AOB and soil environment factors.Methods] MPN-Griess was used to study the distribution of AOB,using Pearson’s correlation analysis relationships between the distribution of AOB and soil environment factors.Results] The distribution of AOB had obvious differ-ences in vegetation communities of wetland in Ebinur Lake.The trend of distribution is that the highest Tamarix ramosissima community area,Halocnemum strobilaceum community is the second smallest and Phragmites australis community area minimum.The distribution of AOB also had obvious differences in different soil layers,the trend of distribution is that 15 cm?25 cm>0?5 cm>5 cm?15 cm>25 cm?35 cm.The distribution of AOB was significantly correlated to soil organic matter content,it had no correlation with pH,Moisture content,Salinity and NH4+?N content.Conclusion] The distribution of AOB had obvious differences in vegetation communities and different soil layers of wetland in Ebinur Lake.Except the distribution of AOB showed obvious relationship with soil organic matter content,it had no relation with the other soil factors.