检索结果-南通市图书馆

Impacts of n-alkane concentration on soil bacterial community structure and alkane monooxygenase genes abundance during bioremediation processes

引用

Frontiers of Environmental Science & Engineering 2018年第5期12卷 155-167页

作者： Yueqiao Liu Aizhong Ding Yujiao Sun Xuefeng Xia Dayi Zhang College of Water Sciences Beijing Normal UniversityBeijing 100875China School of Environment Tsinghua UniversityBeijing 100084China Lancaster Environment Centre Lancaster UniversityLancaster LA14YQUK

Petroleum hydrocarbons,mainly consisting of n-alkanes and polycyclic aromatic hydrocarbons(PAHs),are considered as priority pollutants and biohazards in the environment,eventually affecting the ecosystem and human *** many previous studies have investigated the change of bacterial community and alkane degraders during the degradation of petroleum hydrocarbons,there is still lack of understanding on the impacts of soil alkane contamination *** the present study,microcosms with different n-alkane contamination(1%,3%and 5%)were set up and our results indicated a complete alkane degradation after 30 and 50 days in 1%-and 3%-alkane treatments,*** all the treatments,alkanes with medium-chain length(C_(11)-C_(14))were preferentially degraded by soil microbes,followed by C27-alkane in 3%and 5%*** contamination level slightly altered soil bacterial community,and the main change was the presence and abundance of dominant alkane ***,Gemmataceae and Thermodesulfovibrionaceae were highly related to the degradation of C_(14)-and C_(27)-alkanes in 5%treatment,but linked to alkanes with medium-chain(C11-C18)in 1%treatment and C21-alkane in 3%treatment,***,we compared the abundance of three alkane-monooxygenase genes,e.g.,alk_A,alk_P and alk_*** abundance of alk_R gene was highest in soils,and alk_P gene was more correlated with alkane degradation efficiency,especially in 5%*** results suggested that alkane contamination level showed non-negligible effects on soil bacterial communities to some extents,and particularly shaped alkane degraders and degrading genes *** study provides a better understanding on the response of alkane degraders and bacterial communities to soil alkane concentrations,which affects their biodegradation process.

关键词： Petroleum hydrocarbon contaminated site n-alkane contamination level n-alkane biodegradation soil bacterial community Alkane degraders Alkane-monooxygenase genes

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Control of Southern Root-knot Nematodes on Tomato and Regulation of soil bacterial community by Biofumigation with Zanthoxylum bungeanum Seed

引用

Horticultural Plant Journal 2021年第1期7卷 49-58页

作者： Xiaoyun Wang Wencong Shi Jilei Wang Zheng Gao Shuang Li Ningxin Wang Qinghua Shi College of Horticulture Science and Engineering Shandong Agricultural UniversityTai’an 271018China College of Life Sciences Shandong Agricultural UniversityTai’an 271018China College of Plant Protection Shandong Agricultural UniversityTai’an 271018China State Key Laboratory of Crop Biology Shandong Agricultural UniversityTai’an 271018China Shandong Liangjian Bioengineering Co. Ltd.Jinan 271100China

Biofumigation is an environmentally friendly strategy used to control nematodes and plant *** volatile oil of Zanthoxylum bungeanum has high insecticidal and antibacterial ***,it is not known if the seed of *** is a suitable material for biofumigation to control southern root-knot nematodes(SRKN)on tomato,and how it may regulate the soil bacterial community *** used pot experiments in the greenhouse to determine the effects of *** seeds on SRKN,plant growth parameters,soil physicochemical and microbial characteristics.A total of 26 volatile components,including nematicidally active substances,were identified from *** *** seed biofumigation significantly reduced the SRKN population by 88.89%and 81.55%on the 50th and 100th day after transplanting,*** to the control,the total soluble sugar,soluble solids,soluble protein,titratable acid,root activity and the fruit yield per tomato plant increased *** content of soil alkali-hydrolyzed nitrogen,available potassium and the soil enzyme activities were also significantly *** soil bacterial diversity and the co-occurrence network complexity were increased by *** seed *** keystone OTUs in biofumigation soil had potential plant growth-promoting *** function of *** seed increasing tomato production in SRKN-infected soil depends on directly killing SRKN and improving soil *** results indicate that *** seed can be used as both a nematicide and a high quality organic fertilizer in tomato production.

关键词： biofumigant Zanthoxylum bungeanum seed root-knot nematode tomato soil bacterial community

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Influence of proximity to the Qinghai-Tibet highway and railway on variations of soil heavy metal concentrations and bacterial community diversity on the Tibetan Plateau

引用

Research in Cold and Arid Regions 2019年第6期11卷 407-418页

作者： Xia Zhao JunFeng Wang Yun Wang Xiang Lu ShaoFang Liu YuBao Zhang ZhiHong Guo ZhongKui Xie RuoYu Wang Gaolan Station of Agricultural and Ecological Experiment Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province LanzhouGansu 730000China State Key Laboratory of Frozen soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China Key Laboratory of Desert and Desertification Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China

An understanding of soil microbial communities is crucial in roadside soil environmental *** 16S rRNA se quencing of a stressed microbial community in soil adjacent to the Qinghai-Tibet Highway(QTH)revealed that the accu mulation of heavy metals(over about 10 years)has affected the diversity of bacterial abundance and microbial community *** proximity of a sampling site to the QTH/Qinghai-Tibet Railway(QTR),which is effectively a measure of the density of human engineering,was the dominant factor influencing bacterial community *** diversity of bacterial communities shows that 16S rRNA gene abundance decreased in relation to proximity to the QTH and QTR in both alpine wetland and meadow *** dominant phyla across all samples were Actinobacteria and *** concentration of Cr and Cd in the soil were positively correlated with proximity to the QTH and QTR(MC/WC sam pling sites),and Ni,Co,and V were positively correlated with proximity to the QTH and QTR(MA/WA sampling sites).The results presented in this study provide an insight into the relationships among heavy metals and soil microbial commu nities,and have important implications for assessing and predicting the impacts of human-induced activities from the QTH and QTR in such an extreme and fragile environment.

关键词： Qinghai-Tibet Highway (QTH) Qinghai-Tibet Railway (QTR) soil bacterial community alpine wetland alpine meadow heavy metal

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Shifts in soil bacterial communities induced by the controlled-release fertilizer coatings

引用

Journal of Integrative Agriculture 2016年第12期15卷 2855-2864页

作者： PAN Pan JIANG Hui-min ZHANG Jian-feng YANG Jun-cheng LI Shu-shan LIU Lian ZHANG Shui-qin LEI Mei Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences

Coated controlled-release fertilizers （CRFs） have been widely applied in agriculture due to their increased efficiency. However, the widespread and a lot of coated CRFs application may leave undesired coating residues in the soil due to their slow degradation. Limited information is available on the effects of substantial residual coatings on the soil bacterial community. By adding 0, 5, 10, 20, and 50 times quantities of residual coating from conventional application amount of resin and water-soluble coated CRFs, we studied the responses of soil properties and bacterial community composition to these two residual coatings in black soil. The results showed that the resin and water-soluble coatings did not essentially alter the properties of black soil or cause dramatic changes to bacterial diversity within the test concentration range. The residual resin and water-soluble coatings also did not distinctly alter the relative abundance of the top ten bacteria at phylum level. Heatmap results suggested that the treatments were basically clustered into two groups by concentration rather than types of coating material. Pearson correlation analysis showed that the Simpson＇s diversity index of the bacterial community was significantly correlated with microbial biomass carbon （MBC, r=0.394, P〈0.05）, and the richness index abundance-based coverage estimator （ACE） of the bacterial community was significantly correlated with microbial biomass nitrogen （MBN, t=0.407, P〈0.05）. Overall, results of this study suggested that substantial residual resin and water-soluble coatings with 0-50 times quantities of residual coating from conventional application amount of coated CRFs did not generate obviously negative impacts on the bacterial community in black soil.

关键词： soil bacterial community controlled-release fertilizer residual coatings 454 pyrosequencing

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Halophyte Vegetation Influences soil Microbial community of Coastal Salt Marsh

引用

Journal of Ocean University of China 2022年第6期21卷 1549-1556页

作者： GU Chen SHI Jiyan RUI Jianliang YU Yanming HUANG Weibin LU Zhinai CHEN Yao CHEN Xiaojun DONG Shudi HU Zhijun YE Chenghua Power China Huadong Engineering Corporation Limited Hangzhou 311122China MOE Key Laboratory of Environmental Remediation and Ecosystem Health and Institute of Soil and Water Resources and Environmental ScienceCollege of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China

Coastal wetlands are the most productive ecosystems worldwide and can provide important ecosystem services,yet the characteristics of microbial community within these systems remain poorly *** community of salt marsh vegetation and the associated soil physio-chemical properties were investigated in this *** typical Suaeda australis,Phragmites australis,Spartina alterniflora wetlands,and non-vegetated bare mudflats in the Zhoushan Islands were studied to advance the understanding of the characteristics of soil bacterial communities in coastal *** showed that the bare mudflats exhibited high pH value and soil moisture content compared with the vegetated *** different vegetation types,the organic matter content,total nitrogen,and total potassium content decreased in the order:*** wetland>*** wetland>*** wetland,and there was no obvious difference in total phosphorous *** halophytes could decrease soil salinity compared with bare ***,Nitrospinae,Bacteroidetes,Acidobacteria,and Nitrospirae were the predominant level across all *** prediction showed that SPA-covered soil might play vital roles in sulphur cycling,while SUA and PHR covered soils were involved in nitrogen *** study could provide the first insight into the microbial community of this study area and contribute to a better understanding of vegetation microbiota and bioremediation in coastal wetland ecosystem.

关键词： illumina sequencing salt marsh vegetation type soil bacterial community function prediction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

PCR-RFLP Analysis of bacterial Communities of Remedied Chromium-contaminated soil

PCR-RFLP Analysis of Bacterial Communities of Remedied Chrom...

引用

The 12th Asian Pacific Confederation of Chemical Engineering Congress

作者： Wang Bao-Li Zhai Wen Qu Dong Li yang College of Life Sciences State Key Laboratory of soil Erosion and Dryland Farming on Loess Plateau College of Resource and Environment,Northwest A & F University,Yangling Shaanxi 712100,China

soil bacterial community is an important criteria of soil quality *** study about soil bacterial diversity during the process of soil remediation plays a significant role in the discus- sion of biological theory for e... 详细信息

关键词： Chromium-contaminated soil bacterial community 16S rDNA RFLP

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

The impact of conservation tillage treatments on soil bacterial communities and soil properties in the dryland region of northern China

The impact of conservation tillage treatments on soil bacter...

引用

中国作物学会——2015年学术年会

作者： Ziting Wan Lu Liu Qin Chen Xiaoxia Wen Yuncheng Liao College of Agronomy Northwest A&F University

Conservation tillage is widely utilized in the dryland regions of northern *** treatments can generate changes in the physical and chemical properties of the soil,affecting the soil bacterial ***,knowledge on the effect of conservation tillage on soil bacterial communities and the correlation between physicochemical soil properties and the bacterial community composition is very ***,we investigated the influence of five-years conservation tillage treatments on soil physical and chemical properties and soil bacterial communities in dryland region of northern *** studied soil bacterial community of Plow Tillage(PT),Zero tillage(ZT),and Chisel plow tillage(CPT)by using high throughput sequencing technology and quantitative *** results demonstrate that among the three tillage treatments,ZT was most similar to CPT,and most distinct from PT,using taxonomic and phylogenetic *** to PT,CPT and ZT had notable increases in the abundance of Firmicutes,and decreased abundance of most other phyla(including Actinobacteria,Acidobacteria,and Alphaproteobacteria).Conservation tillage more strongly influenced the composition of the soil microbiota and taxonomic distribution than phylogenetic *** bacterial diversity and community structure were affected by changes to soil texture(clay/silt/sand fraction)caused by tillage *** had an intermediate H’value and Simpson’s index due to the less disruptive agriculture practices that lead to a more abundant soil bacterial ***,our study showed that CPT and ZT can modify and improve the soil bacterial community to produce more stable and sustainable soil ecosystems in the dryland regions of northern China.

关键词： Conservation tillage soil properties soil bacterial community Dryland region Northern China

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：