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Research on Inheritance and Innovation of Children's Folk Sports Culture in the Junction Area Between Chongqing and Hubei
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作者 Huang Shanying Ye Qiong Xiang Hulin 《Contemporary Social Sciences》 2023年第2期146-155,共10页
This paper examines the current status and development dilemma of the children’s folk sports culture in the junction area between Chongqing and Hubei with reference to relevant literature.After the literature review ... This paper examines the current status and development dilemma of the children’s folk sports culture in the junction area between Chongqing and Hubei with reference to relevant literature.After the literature review and summary,the study finds there are several factors restricting the inheritance and development of the children’s folk sports culture in the area,including insufficiency of theoretical analysis,weak public support in cities,blind imitation of modern sports culture,and absence of policy support.To address the above problems,we put forward several suggestions to promote the inheritance and development of children’s folk sports game culture.First,we should focus on the theoretical research and cultural dissemination of children’s folk sports culture.Second,we should improve the basic rules of children’s folk sports games.Third,importance should be attached to government support in developing children’s folk sports game culture.Fourth,we should ensure the continuation and inheritance of children’s folk sports culture via school activities.Finally,we should carry forward children’s folk sports culture and explore ways to develop excellent cultural tourism. 展开更多
关键词 CHILDREN folk sports cultural inheritance junction area between chongqing and Hubei
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Study on Conceptual Planning of Group Landscapes in Urban Core Areas—A Case Study of Conceptual Landscape Planning of the Core Area in Shuangsong Group,Wanzhou District of Chongqing City,China
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作者 廖春艳 沈一 《Journal of Landscape Research》 2012年第2期9-11,17,共4页
The planning site was divided into a spatial structure of"one center,one corridor,two axes,two belts and three communities"and traffic system designed to a 3-grade road system of"artery,secondary artery... The planning site was divided into a spatial structure of"one center,one corridor,two axes,two belts and three communities"and traffic system designed to a 3-grade road system of"artery,secondary artery and by-pass".Meanwhile,a 3-ring structure of the planning site was constructed:diffusion waterfront landscape belt,waterfront pathway and core eco-green island.Finally,the planning concepts for major ecological constructions were given.This study tried to explore the group eco-landscape pattern in urban core areas so as to provide a strategic instruction for the regional sustainable development. 展开更多
关键词 Urban core areas Ecological landscapes Shuangsong GROUP in Wanzhou DISTRICT of chongqing City CONCEPTUAL landscape planning
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Space Pattern of Rural Leisure Tourism Development in Southwest Minority Area——A Case Study of Ethnic Minority Area in Southeast Chongqing
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作者 陶少华 《Journal of Landscape Research》 2010年第8期81-83,共3页
On the basis of analysis of current research documents on rural leisure tourism, taking ethnic minority area of Southeast Chongqing for example, the paper expounded ecology, culture, authenticity and uniqueness of rur... On the basis of analysis of current research documents on rural leisure tourism, taking ethnic minority area of Southeast Chongqing for example, the paper expounded ecology, culture, authenticity and uniqueness of rural leisure tourist resources in ethnic minority area, and city-dependent, scenic area-dependent, traffic route-dependent and remote characteristic village type of space pattern. 展开更多
关键词 Rural LEISURE tourism ETHNIC MINORITY area of SOUTHEAST chongqing Resources feature SPACE PATTERN
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Analyzing land use characteristics of rural settlements on the urban fringe of Liangjiang New Area, Chongqing, China 被引量:8
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作者 WANG Yi BI Guo-hua +1 位作者 YANG Qing-yuan WANG Zhao-lin 《Journal of Mountain Science》 SCIE CSCD 2016年第10期1855-1866,共12页
The objective of this paper is to analyze land use characteristics of rural settlements in urban fringe so as to provide references for optimizing the regional distribution of rural settlements, consolidating rural se... The objective of this paper is to analyze land use characteristics of rural settlements in urban fringe so as to provide references for optimizing the regional distribution of rural settlements, consolidating rural settlements, and coordinating urban-rural integrated development. The methods of spatial statistical analysis, buffer analysis, Ripley's K function, kernel density analysis based on GIS(Geographic Information System) were used to analyze the characteristics of scale, spatial differentiation and spatial patterns of the rural settlements in Liangjiang New Area in Chongqing Municipality of China. The fractal dimension formula was also developed to reflect fractal feature of the rural settlements. The results show that, the scale of rural settlements in Liangjang New Area takes on distinct characteristics of spatial differentiation along with changes in elevation, gradient, location, geohazards distribution, and the like. The fractal characteristic of rural settlements has obvious regional variations subject to the 6 factors of location in the Liangjiang New Area. Overall, the worse the terrain conditions are, the larger the fractal dimension values become. The better the locationconditions, the larger the fractal dimension values are. The spatial pattern in the township scale presents three kinds of distribution as being aggregated, uniform and random. In contract, the spatial pattern in the plaque scale displays a banding distribution from a general view with several aggregation zones centering on each town center. From the results, we can see that the characteristics of rural settlements in urban fringe are more complicated. For such kind of rural settlements in special regions, in the rural land consolidation more attention should be paid to improve the rural living environments and public services, as well as to promote the harmonious relationship between the urban and rural areas. 展开更多
关键词 Land use Rural settlements Land-use characteristics Urban fringe chongqing Liangjiang New area
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Spatiotemporal features of soil and water loss in Three Gorges Reservoir Area of Chongqing 被引量:9
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作者 李月臣 刘春霞 袁兴中 《Journal of Geographical Sciences》 SCIE CSCD 2009年第1期81-94,共14页
Soil and water loss has been the most serious eco-environmental problem in the Three Gorges Reservoir Area of Chongqing.In this paper the authors studied the spatiotemporal features of soil and water loss from 1999 to... Soil and water loss has been the most serious eco-environmental problem in the Three Gorges Reservoir Area of Chongqing.In this paper the authors studied the spatiotemporal features of soil and water loss from 1999 to 2004 based on RS and GIS techniques.The results showed that:(1) The soil and water loss area decreased from 1999 to 2004.(2) Soil and water loss mainly exists in purple soil,yellow soil,limestone soil,paddy soil and yellow brown soil distributed areas.(3) The dry slope land and sparse woodland that are intensively influenced by human activities experienced most serious soil and water loss.(4) Soil and water loss in the study area indicated an obvious vertical differentiation characteristic.(5) There is a significant correlation between soil and water loss and slope.(6) There is no obvious correlation between soil and water loss and aspect.(7) Soil and water loss mainly exists in the values of R between 300 and 340 distribution area.The very-high soil and water loss has obvious correlation with R. 展开更多
关键词 soil and water loss chongqing Three Gorges Reservoir area
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Fluid migration paths in the marine strata of typical structures in the western Hubei-eastern Chongqing area,China 被引量:3
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作者 Xu Guosheng Liang Jiaju +4 位作者 Gong Deyu Wang Guozhi Yuan Haifeng Cao Junxing Zhang Chengfu 《Petroleum Science》 SCIE CAS CSCD 2013年第1期1-18,共18页
The western Hubei-eastern Chongqing area is an important prospective zone for oil and gas exploration in the central Yangtze area. Three representative structures, the Xinchang structure, Longjuba gas-bearing structur... The western Hubei-eastern Chongqing area is an important prospective zone for oil and gas exploration in the central Yangtze area. Three representative structures, the Xinchang structure, Longjuba gas-bearing structure and the Jiannan gas field, were selected to analyze biomarker parameters in marine strata and to examine various types of natural gas and hydrocarbon sources. Fluid inclusions; carbon, oxygen, and strontium isotopic characteristics; organic geochemical analysis and simulation of hydrocarbon generation and expulsion history of source rocks were used for tracing fluid migration paths in marine strata of the study area. The Carboniferous-Triassic reservoirs in three typical structures all experienced at least two stages of fluid accumulation. All marine strata above the early Permian were shown to have fluids originating in the Permian rocks, which differed from the late stage fluids. The fluids accumulated in the late Permian reservoirs of the Xinchang structure were Cambrian fluids, while those in the late Carboniferous reservoirs were sourced from a combination of Silurian and Cambrian fluids. A long-distance and large-scale cross-formational flow of fluids destroyed the preservation conditions of earlier accumulated hydrocarbons. A short-distance cross-formational accumulation of Silurian fluids was shown in the late Permian reservoirs of the Longjuba structure with favorable hydrocarbon preservation conditions. The fluid accumulation in the Carboniferous reservoirs of the Jiannan structure mainly originated from neighboring Silurian strata with a small amount from the Cambrian strata. As a result, the Jiannan structure was determined to have the best preservation conditions of the three. Comparative analysis of fluid migration paths in the three structures revealed that the zone with a weaker late tectonism and no superimposition and modification of the Upper and Lower Paleozoic fluids or the Upper Paleozoic zone with the fluid charging from the Lower Paleozoic in the western Hubei-easteru Chongqing area are important target areas for future exploration. 展开更多
关键词 Western Hubei-eastern chongqing area marine strata geochemical tracer fluid migration path
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Mountain Land Use Planning of Metropolitan Suburbs:the Case of the Jinyun Mountain and Its Surrounding area,Chongqing,China 被引量:14
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作者 SHAO Jingan WEI Chaofu XIE Deti 《Journal of Mountain Science》 SCIE CSCD 2005年第2期116-128,共13页
Open space of metropolitan suburbs in mountain region, has been increasingly becoming the coupling mosaic structure of industrial actions and landscape behaviors. However, the local governments, when making land use p... Open space of metropolitan suburbs in mountain region, has been increasingly becoming the coupling mosaic structure of industrial actions and landscape behaviors. However, the local governments, when making land use planning, often aim at economic development, and rarely refer to the coordination of compatibilities and conflicts between industrial actions and landscape behaviors in the mosaic structure. In this study land use in the Jinyun Mountain and its surrounding area, Chongqing is adjusted by gray multi-objective programming approach and local-level decision-making process to cope with conflicts between objectives for human welfare and objectives for landscape conservation. The results indicate that: 1) the compatibilities and conflicts among different behavior characters and different landscape types result in the compatibilities of landscape to human behavior; 2) a land use planning in the study area is produced based on the sustainable land use and social-eco development, which pays more attention to the resources and environment constraints and economic objectives, and follows the distribution law of rare resources; 3) in the study area, cultivated land of 1,207.27 ha can meet the demands for food and byproducts by the residents there, orchard land and forestland of 632.55 ha, 2,276.61 ha, respectively can provide enough spaee for the local people to improve their living structure and meet their demands for reereational activities, and urban residential land, rural residential land, mining land and transportation land of 1107.60 ha, 120.27 ha, 162.48 ha, 100.91 ha, respeetively can satisfy the resident's eeonomie development and infrastructures; 4) the equilibrium among industrial actions, landscape accessibility and ecological conservation can be obtained by analyzing the possible impaets of human activities on landscape eeologieal proeess in open spaee of metropolitan suburbs in mountain areas. 展开更多
关键词 Mountain land use planning metropolitan suburbs land optimal allocation Jinyun Mountain and its surrounding area chongqing
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Saddle-Dolomite-Bearing Fracture Fillings and Records of Hot Brine Activity in the Jialingjiang Formation,Libixia Section,Hechuan Area of Chongqing City 被引量:1
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作者 HUANG Keke ZHONG Yijiang +2 位作者 HUANG Sijing LI Xiaoning FENG Mingshi 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2016年第1期195-208,共14页
Most vein minerals deposited in fractures of the Jialingjiang Formation from Libixia section, Hechan area include a large amount of saddle dolomite and accompanying celestite, calcite and fluorite. This study analyzed... Most vein minerals deposited in fractures of the Jialingjiang Formation from Libixia section, Hechan area include a large amount of saddle dolomite and accompanying celestite, calcite and fluorite. This study analyzed the nature, source, evolution of the fluids by plane-light petrography, fluid-inclusion methods, cathodoluminescence images, and stable isotopic compositions. The homogenization temperatures of two-phase aqueous fluid inclusions in dolomite range between 100 and 270℃. Combined with the jlSO data, it is suggested that the fluid responsible for the precipitation of fracture fillings have δ18O values between 10%o and 18‰ (relative to SMOW). The saddle dolomite and the accompanying minerals were the result of activity of dense brines at elevated temperatures. Moreover, analysis shows that the fluid was derived from a mixture of marine-derived brine and deeper circulating flow. This fluid was enriched in Sr during diagenesis and formed celestite in fracture and for regional mineralization. Dissolution of saddle dolomite was attributed to the cooling of Mg/Ca-decreased fluids, which may relate to a leaching of gypsum to celestite in surrounding carbonates. 展开更多
关键词 Libixia section Jialingjiang Formation saddle dolomite hot brine Hechuan area chongqing
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Epidemiology and risk factors of retinoblastoma in Chongqing area
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作者 Yu-Qiong Yang Jia Li Hong-Feng Yuan 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2016年第7期984-988,共5页
AIM: To investigate the risk factors of retinoblastoma in Chongqing and offer the bases for scientific measures. METHODS: One hundred and thirty-three retinoblastoma patients were taken as case group, and 133 child... AIM: To investigate the risk factors of retinoblastoma in Chongqing and offer the bases for scientific measures. METHODS: One hundred and thirty-three retinoblastoma patients were taken as case group, and 133 children were taken as control group in 1:1 ratio. The relevant factors were collected from a questionnaire survey which was made by our research group. First, Chi-square and t-test were used to discuss the various factors, and then the logistic regression analysis was made by statistics software SPSS17.0 based on the result of 266 people. RESULTS: Single factor analysis results showed the differences between the two groups were statistically significant (P〈0.05) in 17 factors which were education level of their parents, occupation of their parents, exposure to harmful chemicals of their parents 6mo before pregnancy, the history of pelvic inflammatory disease of mother before pregnancy, childbearing history of their parents, pregnant age of their parents, the medication history of father 6mo before pregnancy, living place of their parents, the pollution living place of mother, hobbies of their parents. Multivariate analysis showed that the living place of parents, mother who feed pets before pregnancy, and exposure to harmful chemicals of father before pregnancy were the independent risk factors of retinoblastoma (P〈0.05). CONCLUSION: The living place of parents, mother who feed pets before pregnancy, exposure to harmful chemicals of father before pregnancy were the risk factors of retinoblastoma which affects the occurrence of retinoblastoma in a certain extent. 展开更多
关键词 chongqing area RETINOBLASTOMA EPIDEMIOLOGY risk factors
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Study on Temporal-spatial Distribution of Heavy Rain and Rainstorm in Different Functional Areas of Chongqing
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作者 Yuan Lin Mou Xinli +2 位作者 Zhang Meng Gu Yi Zhou Jie 《Meteorological and Environmental Research》 CAS 2014年第9期7-10,共4页
To discuss response ability of five functional areas to rainstorm flood in Chongqing,by taking 8 districts( counties) as research object,monthly occurrence times of heavy rain and rainstorm in different functional a... To discuss response ability of five functional areas to rainstorm flood in Chongqing,by taking 8 districts( counties) as research object,monthly occurrence times of heavy rain and rainstorm in different functional areas over the years and appearance month of the maximum rainfall were conducted statistics. Results showed that frequency distribution of heavy rain in whole year in different functional areas was different,but it was similar in the same functional zone. Temporal-spatial distribution of rainstorm was more independent,and there were different performances in various districts of each functional area. In urban functional core area and urban functional expansion area,rainstorm times was more,and the maximum precipitation was larger. In urban development new district,rainstorm times and the maximum precipitation were relatively smaller in whole Chongqing. In ecological conservation development area of northeast Chongqing,rainstorm duration was longer,and we needed prevention and control during June- September. In ecological protection area of southeast Chongqing,although rainstorm occurrence times was the most in Chongqing,the heavy rainstorm was less. 展开更多
关键词 Heavy rain Rainstorm Functional area Temporal-spatial distribution chongqing China
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A comparative study on the extracurricularreading environment of urban and rural children in Chongqing Reservoir Area
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作者 Xiaozhao DENG Haiyan YAO Shubei ZHU 《Chinese Journal of Library and Information Science》 2014年第3期1-17,共17页
Purpose: So far, there have been few studies that discussed children’s reading environment in China’s poverty-stricken areas, this study aims to explore differences existed in extracurricular reading environment bet... Purpose: So far, there have been few studies that discussed children’s reading environment in China’s poverty-stricken areas, this study aims to explore differences existed in extracurricular reading environment between urban and rural children in Chongqing Reservoir Area with empirical evidence.Design/methodology/approach: Using a questionnaire survey, empirical data was collected from 105 participants. Then proposed hypotheses and the reliability of the observation variables were respectively examined with ANOVA and factor analysis. The statistical analysis software SPSS19.0 was used to analyze the data.Findings: Our results showed that 1) differences did exist in school and social reading environment between urban and rural children in Chongqing Reservoir Area; 2) differences in family reading environment between urban and rural children in Chongqing Reservoir Area were not obviously observed.Research limitations: The empirical data were collected from only one county of Chongqing Reservoir Area, which may have partially affected the generalization of our conclusions. In addition, the response rate of questionnaires was comparatively low due to a relatively limited research period. Practical implications: This study would provide some reference for governments, libraries, schools and families to consider how to jointly narrow the gap in the extracurricular reading circumstance between urban and rural children in Chongqing Reservoir Area.Originality value: This is one of the first studies to explore similarities and differences in extracurricular reading environment between urban and rural children in Chinese povertystricken areas, which will help research communities to gain a deeper understanding of children’s reading environment in Chinese Reservoir Area. 展开更多
关键词 Reading environment Extracurricular reading Rural-urban difference Children chongqing Reservoir area
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Experience and Methods for Maize Regional Experiment in Guizhou Mountainous Areas 被引量:1
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作者 周国富 王国忠 陈恩瑞 《Agricultural Science & Technology》 CAS 2016年第2期347-348,416,共3页
Maize regional experiment is a an intermediate link for overall assessment and comprehensive evaluation on yielding ability, stable yield, stress, adaptability, and quality traits of new maize varieties in different e... Maize regional experiment is a an intermediate link for overall assessment and comprehensive evaluation on yielding ability, stable yield, stress, adaptability, and quality traits of new maize varieties in different ecological conditions. It is an essential process for determining whether the new maize varieties can pass the ex- amination and approval for extension. Besides, regional experiment is an important link connecting agricultural scientific researches and agricultural production. In addi- tion, it is a scientific basis for extension and application of new maize varieties in a region. Therefore, the maize regional experiment is of the utmost importance. 展开更多
关键词 Maize regional experiment guizhou mountainous areas Experience and methods
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Geochemical Indication of Sinian Bedded Siliceous Rocks in the Hunan-Guizhou-Guangxi Area and Their Environmental Significance 被引量:3
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作者 PENG Jim YI Haisheng XIA Wenjie 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2000年第1期46-53,共8页
: In the Hunan-Guizhou-Guangxi area there have developed very thick bedded siliceous rocks of the late Sinian. The rocks have a fairly pure composition, with an average content of siliceous minerals exceeding 95%. The... : In the Hunan-Guizhou-Guangxi area there have developed very thick bedded siliceous rocks of the late Sinian. The rocks have a fairly pure composition, with an average content of siliceous minerals exceeding 95%. They are relatively rich in Fe and Mn, and poor in Al, Ti and Mg. The Fe/Ti, (Fe+Mn)/Ti, Al/(Al+Fe+Mn) and U/Th ratios and the Al-Fe-Mn and Fe-Mn-(Ni+Co+Cu)×10 triangle diagrams all show that they are hydrothermal sedimentary siliceous rocks. In the rocks the total amount of REEs is low, the δCe shows an obvious negative anomaly and the δEu a weak anomaly, and LREE>HREE, all indicating that they are products of hydrothermal processes. The δ30Si and δ18O values, as well as the formation temperature of the rocks all clearly show that the silica forming the rocks comes from hot water. Besides, analyses of the depositional environment of the rocks using the MnO/TiO2 ratio and the δCe and δ30Si values yield the same conclusion that they are formed in environments from continental marginal slopes of a bathyal environment to oceanic basins of a deep-sea environment. 展开更多
关键词 siliceous rock hydrothermal sedimentary geochemistry environment SINIAN the Hunan-guizhou-Guangxi area
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Economic and Financial Structural Adjustment at Village Level: A Case Study of Rural Areas in Guizhou Province
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作者 Zhuping ZHANG Zongjian WU +1 位作者 Zhongyong YUAN Wen SUN 《Asian Agricultural Research》 2013年第4期45-49,共5页
Village-level economy is not only the important foundation for promoting grass-roots agricultural and rural modernization, but also an essential guarantee for sustainable development of small scale economy of rural fa... Village-level economy is not only the important foundation for promoting grass-roots agricultural and rural modernization, but also an essential guarantee for sustainable development of small scale economy of rural farmer households. Research on this field will play a significant role in rural economic development of Guizhou Province. Taking the observation data from 1999 to 2009 in 10 fixed observation villages in Guizhou Province, we carried out empirical survey and analysis on land scale and use structure, scale and composition of fixed assets for production, level and composition of operational income, and level and composition of financial revenue and expenditure at village level. Finally, we put forward conclusions and recommendations. 展开更多
关键词 RURAL areas of guizhou PROVINCE Village-level econ
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Study on Depression Development Measures of Karst Rocky Desertification Area in Guizhou Province of China
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作者 韦清章 焦丽 《Journal of Landscape Research》 2010年第9期40-45,共6页
In view of the current situation and environmental fragility of karst depression in Guizhou,the study proposed measures to utilize and explore it so as to promote economic development of Guizhou depression.
关键词 KARST rocky DESERTIFICATION area DEPRESSION DEVELOPMENT guizhou
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Seedling Raising of Moringa oleifera in Chongqing
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作者 Zhengchun WANG Haiyan JIANG +1 位作者 Jing XIN Wanlian XIANG 《Agricultural Biotechnology》 CAS 2018年第6期51-53,共3页
The tests of raising seedlings of Moringa oleifera were carried out in autumn and spring in Chongqing.The results showed that in the case of container seedling raising,the seedling emergence rate in autumn was 90%.Due... The tests of raising seedlings of Moringa oleifera were carried out in autumn and spring in Chongqing.The results showed that in the case of container seedling raising,the seedling emergence rate in autumn was 90%.Due to the large humidity and extreme weather,and the limited management conditions such as ventilation,the seedlings suffered from serious diseases,and the preservation rate was only 30%.The emergence rate was 91% in the spring of 2017,and the seedlings had unanimous growth.However,the seedling preservation rate dropped to 75% due to hail.In the spring of 2018,the emergence rate was 93%,and the seedlings also had unanimous growth.By the end of May,the seedlings had grown to 15 cm high.In addition,in the field seedling raising in 2017 and 2018,the seedlings showed unanimous growth with the emergence rate of 88% and 90%,respectively,and the seedlings grew into 30 cm high with good growth conditions in May. 展开更多
关键词 chongqing area Moringa oleifera CONTAINER SEEDLING RAISING FIELD SEEDLING RAISING
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Characteristics and Methods of Groundwater Environmental Impact Assessment in Mining Areas of Guizhou Province:A Case Study of Zhijin Area of Zhina Mining Area
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作者 Xue Jinzhi 《Meteorological and Environmental Research》 CAS 2018年第3期86-91,共6页
In Guizhou Province,karst areas and springs are widely distributed,and hydrogeological conditions are complex in mining areas. Usually there are many hydrogeological units in a mining area,and the hydrogeological cond... In Guizhou Province,karst areas and springs are widely distributed,and hydrogeological conditions are complex in mining areas. Usually there are many hydrogeological units in a mining area,and the hydrogeological conditions are very different from that of most northern mining areas in China. In view of the uniqueness of mining areas in Guizhou Province,taking Zhijin area of Zhina mining area as an example,the planning characteristics of mining areas and characteristics of groundwater environment in Guizhou Province were analyzed firstly,and then the characteristics and key considerations of groundwater environmental impact assessment in mining areas of Guizhou Province were studied. For example,when the height of water flowing fractured zone,impact radius,and the amount of water resources affected are calculated,it is necessary to analyze and evaluate as many typical mines as possible. The impact on springs as the sources of residents' drinking water should be analyzed one by one. 展开更多
关键词 guizhou Province Mining areas Groundwater environmental impact assessment Characteristics Methods
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Geochemical Tracing of Ore-forming Material Sources of Carlin-type Gold Deposits in the Yunnan-Guizhou-Guangxi Triangle Area --A Case Study of the Application of the Combined Silicon Isotopes Geochemistry and Siliceous Cathodoluminescence Analysis 被引量:1
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作者 LIU Xianfan NI Shijun +2 位作者 LU Qiuxia JIN Jingfu ZHU Laimin 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 1999年第1期30-39,共10页
Abstract This paper deals with characteristics of silicon isotope compositions and siliceous cathodoluminescence of host rocks, ores and hydrothermal silicified quartz of the Carlin-type ore deposits in the Yunnan-Gui... Abstract This paper deals with characteristics of silicon isotope compositions and siliceous cathodoluminescence of host rocks, ores and hydrothermal silicified quartz of the Carlin-type ore deposits in the Yunnan-Guizhou-Guangxi triangle area. The study shows that primary silicified quartz is nonluminescent but quartz in host rocks and secondary silicified quartz are luminescent by the action of cathode rays. Correspondingly, silicon isotope compositions of host rocks, ores and hydro6thermal quartz veins are clearly distinguished. In strata from the Middle Triassic to the “Dachang” host bed, δ30Si of the host rocks ranges from 0.0% ?0.3%, while that of primary ore-forming silicified fluids from ?0.1% to ?0.4%; in the Upper Permian and Lower Carboniferous strata and Indosinian diabase host beds, δ30Si of the host rocks is from ?0.1% to ?0.2% and that of the primary silicified quartz veins from 0.3 % ?0.5 %. This pattern demonstrates the following geochemical mineralization process, primary ore-forming siliceous fluids migrated upwards quickly along the main passages of deep-seated faults from mantle to crust and entered secondary faults where gold deposits were eventually formed as a result of permeation and replacement of the siliceous ore-forming fluids into different ore-bearing strata. This gives important evidence for the fact that ore-forming fluids of this type of gold deposits were mainly derived from upper mantle differentiation and shows good prospects for deep gold deposits and geochemical background for large and superlarge gold deposits. 展开更多
关键词 silicon isotope siliceous cathodoluminescence tracing of ore-forming material source Carlin-type gold deposit Yunnan-guizhou-Guangxi triangle area
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Market Potential for Reproductive Health Services Huge in Rural Areas--A case study of Kaili, Guizhou Province
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《China Population Today》 2001年第5期8-15,共2页
关键词 A case study of Kaili guizhou Province Market Potential for Reproductive Health Services Huge in Rural areas CASE
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Research on the Longitudinal Transmission Mechanism of Prices for Urban Vegetable Supply Chain-Based on the Empirical Research in Chongqing
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作者 Peng XIE Jing GAO Yurong YANG 《Asian Agricultural Research》 2014年第8期42-44,48,共4页
This paper mainly introduces the longitudinal transmission mechanism of urban vegetable prices in Chongqing area. On the basis of the supply chain theory,the " farm price- wholesale price- retail price" of v... This paper mainly introduces the longitudinal transmission mechanism of urban vegetable prices in Chongqing area. On the basis of the supply chain theory,the " farm price- wholesale price- retail price" of vegetables in Chongqing has been identified as the research object. Through statistical analysis,it is found that the above three types of price show a modest annual fluctuation of 7- 12% from 2008 to2013. Later,the paper focuses on the empirical research on the weekly price data in 2013 applying the co-integration theory,which reveals that the farm price of vegetables is largely influenced by themselves; the wholesale price of vegetables is mainly affected by their own price,the production price and the retail price of the earlier stage without the current influence of the production price; and the retail price of vegetables is also affected by their own price,but is not affected by the their current local price and the wholesale price. Vegetable prices have shown an obvious positive transmission mechanism in the links from production to retail,but the feedback effect of retail on production is not brought into play. 展开更多
关键词 VEGETABLE PRICES Longitudinal TRANSMISSION chongqi
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