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大气氮沉降量持续增加已经成为当前关注的热点。土壤细菌群落作为土壤环境中大量存在的微生物,在养分循环过程中发挥着不可忽视的作用。在福建三明森林生态系统与全球变化研究站陈大观测点,我们在野外模拟大气氮沉降试验,通过16S rDNA扩增子测序,研究中亚热带地区杉木幼林土壤细菌群落多样性和组成对氮沉降的响应。结果表明:短期施氮对研究区的土壤细菌群落多样性和组成并未产生显著影响,但高氮处理显著改变敏感菌群相对丰度,如富营养型类群丰度增加,贫营养型类群丰度降低。土壤细菌群落的营养策略发生变化,这可能是受到了养分有效性的驱动。因此,了解土壤细菌群落和养分分配格局对氮沉降的响应,有助于提高我们对未来环境的预测能力。
Atmospheric nitrogen deposition continues to increase has become the current focus of attention. As a large number of microorganisms in soil environment, soil bacterial communities play an important role in nutrient cycling. At the Chen observation station of the Sanming Forest Ecosystem and Global Change Research Station in Fujian Province, we simulated atmospheric nitrogen deposition in the field and sequenced the 16S rDNA amplicon to study the effects of bacterial community diversity and composition on soil nitrogen deposition in young Chinese fir subtropics response. The results showed that short-term nitrogen application had no significant effect on the diversity and composition of soil bacterial community in the study area. However, the high-nitrogen treatment significantly changed the relative abundance of the sensitive flora. For example, the abundance of eutrophication increased, Reduced degree. Changes in the nutritional strategies of soil bacterial communities may be driven by nutrient availability. Therefore, understanding the response of soil bacterial communities and nutrient allocation patterns to nitrogen deposition will help improve our ability to predict the future environment.