Soil properties and habitats determine the response of bacterial communities to agricultural wastewa

来源 :土壤圈(英文版) | 被引量 : 0次 | 上传用户:king0083
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Increasing tenperatures and variability of precipitation events due to climate change will lead in the future to higher irrigation demands in agroecosystems.However.the use of secondary treated wasterwater (TWW) could have consequences for the receiving soil environment and its resident microbial communities.The objective of this study was to characterize the importance of soil properties and habitats to the response of soil bacteria and archaea to irrigation with TWW.Two agricultural soils with contrasting textures (loamy sand or silt loam) and,for each,three variants differing in soil organic carbon and nitrogen,as generated by long-term fertilization,were analyzed.For each of these six soils,prokaryotic communities from two habitats,i.e.,root-free bulk soil and the rhizosphere of developing cucunber plants in the greenhouse,were characterized.Communities were analyzed by the quantity and diversity of their polymerase chain reaction (PCR)-amplified 16S rRNA genes.To account for TWW-associated nutrient effects,potable water (PW)served as a control.Anplicon sequence analysis showed that prokaryotic communities mainly consisted of bacteria (99.8%).Upon irrigation,regardless of the water quality,prokaryotic diversity declined,pH increased,and no bacterial growth was detected in bulk soil.In contrast,the growth of cucumbers was stimulated by TWW,indicating that plants were the main beneficiaries.Moreover,strong responses were seen in the rhizosphere,suggesting an indirect effect of TWW by altered rhizodepositions.The main bacterial responders to TWW were Proteobactcria,Bacteroidetes,Actinobacteria,and Planctomycetes.Changes in bacterial communities due to TVW were less pronounced in all variants of the silt loam,indicating the importance of clay and soil organic carbon for buffering effects of TWW on soil bacterial communities.Hence,soil organic carbon and soil texture are important parameters that need to be considered when applying TWW in agriculture.
其他文献
EDUF(electrodialysis with ultrafiltration membranes)是在传统的电渗析器中引入超滤膜,或是用超滤膜取代部分离子交换膜的一种新型膜分离技术,其中超滤膜作为两液流的接触界
本文首先综述了石油污染土壤生物修复技术的研究现状与进展,重点分析了影响生物修复效果的主要因素,然后简要介绍了某油田土壤石油污染状况,最后列出了本论文的主要研究任务和目
基于篆书的正体身份、端庄形象与进入文人艺术行列的时间最晚这两种情况,篆书的创新滞后于其他书体,而无疑当代书法的创作已经进入了创作形式多元化的时代,创作取法也更加多
我国即将实施新一轮的铁路提速,铁路的优越性将会进一步显现。但是高速铁路会进一步加剧对沿线环境的噪声、振动等方面的环境影响,必须对其加以有效的控制。现有的研究主要针对
目的 回顾分析并总结日间官腔镜手术围术期麻醉特征,为安全开展日间宫腔镜手术提供参考依据.方法 按照日间手术管理模式,对535例日间官腔镜手术患者进行麻醉管理,观察术中不
海岸带地下水-海水交换包括海水入侵和地下水海底排泄两个方面,是水循环的重要环节。在天津滨海平原,海水入侵地下水对地下水资源、水环境的影响,地下水海底排泄对海洋水资源、
当前,能源短缺及环境污染问题成为制约我国乃至世界经济发展的瓶颈,因此,作为化石能源的替代品,可再生清洁能源——氢能日益受到世人的重视,并引发了世界范围内研究氢能的热潮。有
近年来,随着石油的深度开采、化工企业的大型化发展和对环境保护的严格要求,油水分离技术日益受到重视。然而,随着各种工业的发展,对含油废水的处理要求也越来越高。我国现有的含
高温堆肥化是将固体有机废弃物转化为高质量有机肥的重要无害化和资源化途径,它不仅可以解决规模化养殖场环境污染问题,而且对于发展有机肥、保持和提高土壤肥力,促进农业持续发
钛酸铋钠(Na0.5Bi0.5)TiO3(简称NBT)是一类钙钛矿型的A位离子复合取代铁电体,其居里点(Tc)为320℃,在室温下具有很强的铁电性,被认为是无铅压电陶瓷最有希望的候选材料之一。本论文采用传统固相法、熔盐法和水热法制备了NBT基([Bi0.5(Na1-x-yKxLiy)0.5]TiO3)陶瓷粉体,系统研究了粉体的合成方法与制备工艺;研究了NBT基陶瓷材料的极化行为和压电性能,分析了N