Rammed earth wall technique is one of the local widespread traditional construction methods, and it has superior physical property and ecological protection characteristic. When contemporary raw-soil building is replaced by industry building, the hometown building culture is perishing gradually. In order to inherit and develop the Hanzhong local building, rammed earth wall in Taiyangling and Cangshe hometown is investigated, and the characteristics and construction techniques of the local rammed earth wall are concluded. According to the construction problems, the improvement suggestions are put forward, which establishes the foundation to investigate rammed earth wall further, and guide Rural House construction.
【目的】本研究揭示云南腾冲热海热泉真菌多样性及群落分布格局,探讨其理化因子对真菌群落结构的影响。【方法】利用Illumina Hi Seq2500高通量测序平台对腾冲热海热泉沉积物宏基因组ITS基因进行测序,并进行生物信息分析。【结果】从5个热泉样品中共检测到343484条有效序列,包括5个真菌门,20个纲,66个目。右姐妹泉(JMQR)、左姐妹泉(JMQL)、蛤蟆嘴泉(M)、桥泉(QQ)及鼓明泉(GMQP)分别以Agaricales、Eurotiales、Capnodiales和Hypocreales等为优势目。在属水平上,共获得365个属,从JMQR中检测到212个属,以裂褶菌属(Schizophyllum)为最优势;从JMQL中挖掘到197个属,以青霉属(Penicillium)为最优势类群;从M和QQ中分别获得222个和270个属,均以枝孢属(Cladosporium)为最优势;从GMQP中发现179个属,以侧齿霉属(Engyodontium)丰度最高。NH4+含量、温度及pH影响不同优势真菌的分布,其中以pH与优势类群(OTU>1%)结构变化显著性最高(P=0.05)。【结论】云南腾冲热海高温热泉蕴藏着极其丰富的真菌物种,其不同样品真菌分布具有差异性,pH可能是影响热泉真菌群落分布的重要因素之一。
