检索结果-南通市图书馆

Weathering-pedogenesis of Carbonate Rocks and Its Environmental Effects in subtropical region

Acta Geologica Sinica(English Edition) 2008年第5期82卷 982-993页

作者： ZHU Lijun HE Shouyang LI Jingyang Key Laboratory of Karst Environment and Geological Hazard Prevention （Guizhou University） Ministry of Education Guiyang Guizhou 550003 Bureau of Geology and Mineral Exploration and Development of Guizhou Province Guiyang Guizhou 550004 Laboraryfor Study of Earth＇s Interior and Geofluids Institute of Geochemistry Chinese Academy of Sciences Guiyang Guizhou 550002 Graduate University of the Chinese Academy of Sciences Beijing 100039

We investigated the weathering-pedogenesis of carbonate rocks and its environmental effects in subtropical regions of China. The investigation demonstrated that the weathering- pedogenesis of carbonate rocks is the process of a joint action of corrosion and illuviation and metasomatism in subtropical region. It is characterized by multi-stage, multi-path and multi-style. With the persisting development of weathering-pedogenesis of carbonate rocks, metasomatic pedogenesis progressively became the main process of the weathering-pedogenesis and the dominant style of formation of minerals. And it proceeds through the whole process of evolution of the weathering-pedogenesis of carbonate rocks. The stage evolution of weathering-pedogenesis of carbonate rocks and the fractionation evolution of newly produced minerals are characterized by obvious vertically zoning structures and the rules of gradation of elements geochemical characteristics in the carbonate rocks weathering profiles. The geochemical process of weathering-pedogenesis of carbonate rocks can be divided into three geochemical evolution stages, i.e., the Ca, Mg-depletion and Si, Al-enrichment stage; the Fe, Mn enrichment stage and the Si-depletion and Al-enrichment stage in the subtropical regions. Consistent with the three geochemical evolution stages, the sequence of formation and evolution of minerals can be divided into the clay mineral stage; the Fe, Mn oxide and the gibbsite stage. The influence of weathering-pedogenesis of carbonate rocks on the chemical forms of heavy elements is mainly affected via newly produced components and minerals in the process of weathering-pedogenesis, e.g., iron oxide minerals and organic matters. The important mechanism for the mobilization, transport and pollution of F and As is affected the selective adsorption and desorption of F and As on the surface of iron oxide minerals in the subtropical karst zones, i.e., the selective adsorption and desorption on mineral surfaces of

关键词： carbonate rocks weathering-pedogenesis metasomatic pedogenesis environmental effects subtropical region

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

A STUDY ON CLIMATIC RESOURCES AND ALLOCATION OF ECONOMIC FOREST/FRUIT IN THE EASTERN PART OF THE subtropical region OF CHINA

引用

Journal of Geographical Sciences 1992年第1期3卷 84-94页

作者： Zhang Yangcai Academy of Meteorological Science State Meteorological Administration

The vertical and horizontal distributions of light,heat and water resources in the eastern part of the subtropical region of China are *** vertical stratification model of agroclimatic resources was developed by taking the comprehensive action of multiple climatic factors into *** to the analysis of the climatic conditions for high quality and high-yield subtropical economic forest and fruit,it was proposed that subtropical economic forest and fruit production bases could be established in three layers,each with different characters and ways of *** serves as a guiding principle for rational development of mountainous agroclimatic resources and production.

关键词： subtropical region agroclimatic resources ecological model

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Population occurrence of the fall armyworm,Spodoptera frugiperda(Lepidoptera:Noctuidae),in the winter season of China

引用

Journal of Integrative Agriculture 2021年第3期20卷 772-782页

作者： YANG Xian-ming SONG Yi-fei SUN Xiao-xu SHEN Xiu-jing WU Qiu-lin ZHANG Hao-wen ZHANG Dan-dan ZHAO Sheng-yuan LIANG Ge-mei WU Kong-ming State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193P.R.China State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops Fujian Agriculture and Forestry UniversityFuzhou 350002P.R.China College of Plant Protection Southwest UniversityChongqing 400716P.R.China

Fall armyworm(FAW),Spodoptera frugiperda(***),has become an important pest in Chinese agricultural systems since its invasion on 11 December *** its establishment,FAW months in the year-round breeding region have become the main source population migrating to other areas in *** investigations were conducted in tropical and subtropical regions to improve understanding of its year-round breeding area in *** results showed that FAW larval density was significantly correlated with the seasonal temperature of the location *** FAW larvae maintained a high density in the tropical area and were frequently found in sites of the south subtropical region,but were absent from the north subtropical region and the northern part of the central subtropical *** results indicated that FAW can reproduce annually in the tropical and south subtropical regions of China,including Hainan,Taiwan and the southern area of Fujian,Guangdong,Guangxi,Guizhou,and ***,great effort should be made to monitor and control FAW in the year-round breeding region to suppress the population density of this area and to reduce migration of moths into northern parts of *** study clarifies the occurrence area of the pest in winter in China and provides much valuable information for its population forecasting and management.

关键词： fall armyworm temperature year-round breeding region tropical region subtropical region

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

Effects of Overwintering on the Survival and Vector Competence of Aedes albopictus in the Urban Life Cycle of Dengue Virus in Guangzhou,China

引用

Virologica Sinica 2021年第4期36卷 755-761页

作者： Yue Chen Ronghua Chen Jianrong Gao Chunyuan Li Jun Liu Zhijian Zhou Ruiwen Ren Center for Disease Prevention and Control of the Southern Theatre Command of the PLA Guangzhou510507China Guangdong Arbovirus Diseases Emergency Technology Research Center Guangzhou510507China

The Pearl River Delta,where Aedes albopictus(***)is the only vector for dengue transmission,has exhibited one of the highest dengue burdens in southern China in recent ***,whether dengue virus(DENV)can overwinter in *** in the Pearl River Delta has not been determined to *** this study,300 field-derived *** mosquitoes from Guangzhou that were infected with the predominant endemic DENV-1 strain were investigated under simulated urban balcony environment from October 16,2016,to June 16,*** vertical transmission of DENV in the infected overwintering *** was *** DENV infected overwintering mosquitoes were evaluated for viral load at nine-time points using reverse transcription-quantitative *** vector competence of the infected overwintering *** was also investigated by using suckling *** mosquitoes and larvae were found during the observation *** vertical transmission of DENV-1 was *** DENV-1-positive rates between overwintering males and females had no *** proportion of DENV-1-positive overwintering mosquitoes decreased over time and had no difference beyond three months after the *** mosquitoes can spread DENV-1 to *** engorged mosquitoes at an ambient temperature below 15℃were *** ratio of engorged mosquitoes was positively correlated with the ambient temperature ranging from 15 to 30℃.Our results demonstrated that DENV can overwinter in *** in the Pearl River Delta,*** is the competent vector for DENV,and maintain autochthonous dengue outbreaks in the Pearl River Delta through vertical transmission.

关键词： Dengue virus(DENV) Aedes albopictus Overwintering Vertical transmission subtropical region

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

The potential of agricultural by-products in livestock production in subtropical regions

The potential of agricultural by-products in livestock produ...

引用

低碳经济与高效养殖——第六次全国饲料营养学术研讨会暨动...

作者： Y.G.Zhang,F.G.Yin,X.Wu,Y.L.Yin~* (Key Laboratory for Agro-ecological Processes in subtropical region,Institute of subtropical Agriculture,the Chinese Academy of Sciences,Changsha,Hunan 410125,China)

Livestock play important economical roles in most small farm throughout the world,especially in subtropical *** subtropical region in China covers 14 provinces that have been densely populated and highly cultivated,and produces 52%of the grains,60%of the pork,and 86%of the rice of the whole *** this regard,crop-livestock integration is a novel strategy to make full use of the agricultural products and improve theLivestock play important economical roles in most small farm throughout the world,especially in subtropical *** subtropical region in China covers 14 provinces that have been densely populated and highly cultivated,and produces 52%of the grains,60%of the pork,and 86%of the rice of the whole *** this regard,crop-livestock integration is a novel strategy to make full use of the agricultural products and improve the

关键词： agricultural by-products livestock production subtropical region

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 Analysis of the Endanger Habitat of Chinese Hemlock

The Analysis of the Endanger Habitat of Chinese Hemlock

引用

第六届全国系统与进化植物学青年学术研讨会

作者： Wang Qing(Institute of Botany, Jiangsu Province and the Chinese Academy of Sciences, Nanjing 210014)

Three Chinese hemlocks were ranked as"vulnerable species"in the Chinese Red-Data *** test which factorsmight adequately explain the lack of hemlock regeneration in China,the native habitat factors,the life history andpalynological records of the Chinse hemlock were *** result suggest that Late Tertiary,especial Pleistoceneclimatic deterioration and concomitant aridity of Asia continent mainly served to the endanger habitat of Chinese Tsugaspecies,eliminate Tsuga from much of their ranges,causing them to develop in "relict" habitat,and forced remainingpopulation far to the south localized in the subtropical mid-altitude mountain needle-leafed forests and needle-leafed and

关键词： hemlock forest subtropical region 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

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

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：