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The application of chemical P significantly improved the sustainability index of soil P, but the application of chemical N and K did not significantly change the sustainability index of soil N and K nutrients compared to the N- and K-lack treatments, respectively. In summary, the use of balanced fertilizer application is critical for achieving high maize yield in typical yellow soil regions in Guizhou Province.

P and N fertilizers are equally important for improving maize yield, and long-term application of unbalanced chemical fertilizer, especially the lack. Distribution and transfer of potentially toxic metal loid s in Juncus effusus from the indigenous zinc smelting area, northwest region of Guizhou Province, China. We collected samples i. The results include the following: First, there is a high concentration of one or more potentially toxic metal loid s in the slag and surrounding soil in the research area. This situation might be caused by metal loid damage or contamination due to the circumstances.

Additionally, Juncus effusus in the indigenous zinc smelting area are contaminated by some potentially toxic metal loid s; since they are used for Chinese medical materials, it is especially significant that their As, Cd and Pb concentrations are greater than their limited standard values.

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Finally, both the bioconcentration factors and transfer factors for most potentially toxic metal loid s in Juncus effusus are less than 1 in the study area. Therefore, we suggest that Juncus effusus could be used for phytostabilization or as a pioneer plant for phytoremediation of potentially toxic metal loid s because it has a tolerance and exclusion mechanism for these metal loid s in the research district.

HPV varies geographically and is correlated with cervical cancer genesis and progression.


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The rates of DNA sequence mutation and amino acid mutation were Both E6 and E7 genes showed higher mutation rate than their prototypes. The possible correlation between genetic variation and cancerigenesis may be used to design an HPV vaccine for cervical carcinoma. Soil quality changes in land degradation as indicated by soil chemical, biochemical and microbiological properties in a karst area of southwest Guizhou , China.

Not only the nutritional status and biological activity but also the soil ecological functioning or soil health has been impacted profoundly by land degradation in the karst area of southwest China where the karst ecosystems are generally considered as extremely vulnerable to land degradation under intensified land-use changes. The objectives of this study are to elucidate the changes in overall soil quality by a holistic approach of soil nutritional, biological activity, and soil health indicators in the karst area as impacted by intense cultivation and vegetation degradation.

Topsoil samples were collected on selected eco-tesserae in a sequence of land degradation in a karst area of southwest Guizhou in The soil nutrient pools of organic carbon Corg , extractable extracellular carbon Cext , total soil nitrogen Nt , alkali-hydrolyzable nitrogen Nah , total phosphorus Pt , available phosphorus Pa were analyzed by wet soil chemistry.

The soil biological properties were studied by means of measurements of microbial biomass carbon both by fumigation-extraction, FE-Cmic, and by calculation from substrate-incubation respiration, SIR-Cmic of respiration [respiration without addition of substrates, basal respiration BR , and potential respiration PR with substrate-incubation] and of soil enzyme activities invertase, urease, and alkaline phosphatase.

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While the nutritional pool parameters, such as Corg and Cext, described basically the changes in soil life-supporting capacity with cultivation interference and vegetation declined, those parameters of biological activity such as FE-Cmic, SIR, and SIR-Cmic as well as bacterial community structures measured by molecular method evidenced well the changes in soil functioning for ecosystem health with. It is the first report on SSR-based molecular evaluation of genetic variability among sugarcane genotypes from the Karst region of China that provides useful information for local sugarcane improvement.

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Eighteen sugarcane genotypes including 13 active cultivars and five elite QT-series clones bred l Copper deficiency in Guizhou semi-fine wool sheep on pasture in Nov 23, The Guizhou semi-fine sheep in the Weining County, Guizhou province, south west China karst mountain area were affected by an ailment characterized by pica, emaciation, dyskinesia, depressed appetites, unsteady gait and anemia.

We found that concentrations of copper Cu in soil and forage. Carbon-oxygen isotopes and rare earth elements as an exploration vector for Carlin-type gold deposits: A case study of the Shuiyindong gold deposit, Guizhou Province, SW China. The Shuiyindong gold deposit is a deeply concealed strata-bound Carlin-type deposit in southwestern Guizhou Province, China. The deposit lies on the eastern limb of the Huijiabao anticline with ores mainly along the anticline axis and hosted in bioclastic limestone, containing calcite veins, of the Permian Longtan Formation units.


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In this study, we measured carbon and oxygen isotopic ratios and rare earth element REE concentrations of the host rocks and calcite veins along a profile across the Shuiyindong deposit. In this paper three new species of the genus Anatkina are described from Guizhou,China. All the type specimens are deposited in the Agricultural College of Guizhou University. This species resembles A. This species is similar to A.

This species has unique colour pattern on head and pronotum,forewing black with two red stripes in basal half,which are different from those of any other species of the genus. The soil was moderately polluted by Cu because of the high geochemical background value of Cu in the area. The potential environment risk index RI showed that 7. While in mature tea leaves, they were —10,, —, 0. Furthermore, the concentrations of Pb, Cu, As, Hg, Cd, and Cr in young tea leaves and mature tea leaves were all lower than the standard limit values 5.

Besides, the accumulation ability of tea leaves to Mn was the strongest, and the average bioconcentration factor BCF of Mn in mature tea leaves was In addition, the average target hazard quotients THQ were all less than one for the young tea leaves and the average aggregate risk hazard index HI to adults was 0. However, for mature tea. Landsat images from the years , , , and were analyzed using geographical information system GIS techniques.

This change in land use structure was embodied in the rapid increase of developed areas with a relative change rate of up to The increase in developed areas mainly occurred in agricultural land, especially near the shores of Lake Dianchi. The spatial pattern and structure of the change was influenced by the urban sprawl of the city of Kunming. The urban sprawl took on the typical expansion mode of cyclic structures and a jigsaw pattern and expanded to the shore of Lake Dianchi. Agricultural land changed little with respect to the structure but changed greatly in the spatial pattern.

The landscape in the watershed showed a trend of fragmentation with a complex boundary. The organic-rich sediments were widely deposited over the entire Yangtze Block during the Early Cambrian late Nemakit-Daldynian to Botomian. In the mid-upper Yangtze region, northeastern Guizhou , South China , they comprise, in ascending order, the Niutitang, Jiumenchong and lower Bianmachong formations which are dominated by black shales except the middle one characterized by interbedded shales-limestones.

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Three third-order depositional sequences are identified in the two studied sections located on the upper slope to basin of the open shelf. The organic-rich sediments were mostly deposited notably during transgressions on the shallower upper slope-margin TOC up to 25 wt. In contrast, in the shelf basin, the concomitant organic-rich sediments yield lower organic TOC Block within the north mid-low-latitude trade-wind zone during deposition the Early Cambrian. As such, enhanced offshore currents driven by the trade winds could have further induced the upwelling of nutrient-rich deep waters along the shelf during the transgressions, although tended to wane onwards, leading to the tempo-spatial heterogeneities in organic production and redox state across the shelf sea.

Effects of mining activities on evolution of water quality of karst waters in Midwestern Guizhou , China : evidences from hydrochemistry and isotopic composition. Zhijin coal-mining district, located in Midwestern Guizhou Province, has been extensively exploited for several decades. The discharge of acid mine drainage AMD has constituted a serious threat to local water environmental quality, which greatly affected the normal use of local people.

The Permian limestone aquifer is the essential potable water supply for local people, which covered under the widely distributed coal seams. To investigate the origin of the water, the evolutionary processes, and the sources of dissolved sulfate in the karst waters, the mine water, surface water, and groundwater near the coal mines were sampled for stable isotopes H, O, and S and conventional hydrochemical analysis.

The results of hydrochemistry and isotopic composition indicate that the regional surface water and partial karst groundwater are obviously affected by coal-mining activities, which is mainly manifested in the increase of water solute concentration and the change of hydrochemical types. The surface water is mainly controlled by the oxidation of pyrite, as well as the dissolution of carbonate rocks, whereas that of natural karst waters is influenced by the dissolution of carbonate rocks.

Given the similar chemistry and isotopic composition between surface water and partial groundwater, it is reasonable to assume that most of the dissolved sulfate source in part of the groundwater was derived through the oxidation of pyrite in the coal. Furthermore, the contamination of the surface water and partial groundwater from the coal seam has occurred distinctly in the. Methane and CO2 emissions from China 's hydroelectric reservoirs : a new quantitative synthesis.

Controversy surrounds the green credentials of hydroelectricity because of the potentially large emission of greenhouse gases GHG from associated reservoirs.


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However, limited and patchy data particularly for China is constraining the current global assessment of GHG releases from hydroelectric reservoirs. This study provides the first evaluation of the CO2 and CH4 emissions from China 's hydroelectric reservoirs by considering the reservoir water surface and drawdown areas, and downstream sources including spillways and turbines, as well as river downstream.

The total emission of China 's hydroelectric reservoirs thus currently mitigate GHG emission when compared to the main alternative source of electricity with potentially far great reductions in GHG emissions and benefits possible through relatively minor changes to reservoir management and design. Based on our finding, a substantial revision of the global carbon emissions from hydroelectric reservoirs is warranted.

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Recent years, large amount of natural gas has been discovered in volcanic rock of Lower Crataceous of Songliao basin. Volcanic reservoirs have become one of the important target reservoir types of eastern basin of China. In order to study the volcanic reservoirs , we need to know the main factors controlling the reservoir space. By careful obsercation on volcanic drilling core, casting thin sections and statistical analysis of petrophysical properties of volcanic reservoir in Songliao basin, it can be suggested that the igneous rock reservoir in Yingcheng formation of Lower Crataceous is composed of different rock types, such ad rohylite, rohylitic crystal tuff, autoclastic brecciation lava and so on.

There are different reservoirs storage space in in various lithological igneous rocks, but they are mainly composed of primary stoma, secondary solution pores and fractures. The evolution of storage space can be divided into 3 stage: the pramary reservoir space,exogenic leaching process and burial diagenesis. During the evolution process, the reservoir space is effected by secondary minerals, tectonic movement and volcanic hydrothermal solution. The pore of volcanic reservoirs can be partially filled by secondary minerals, but also may be dissoluted by other chemical volcanic hydrothermal solution.

Therefore, the favorable places for better-quality volcanic reservoirs are the near-crater facies of vocanic apparatus and dissolution zones on the high position of paleo-structures. It is reported that these banks will provide Guangdong Aluminum Group with RMB 30 billion for an alu-minum oxide and supporting bauxite mining project in Guizhou.

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A total of DNA A time series analysis of meteorological factors and hospital outpatient admissions for cardiovascular disease in the Northern district of Guizhou Province, China. Jie, Y. Findings on the effects of weather on health, especially the effects of ambient temperature on overall morbidity, remain inconsistent. We conducted a time series study to examine the acute effects of meteorological factors mainly air temperature on daily hospital outpatient admissions for cardiovascular disease CVD in Zunyi City, China , from January 1, to November 30, We used the generalized additive model with penalized splines to analyze hospital outpatient admissions, climatic parameters, and covariate data.

Results show that, in Zunyi, air temperature was associated with hospital outpatient admission for CVD. Our analyses provided statistically significant evidence that in China meteorological factors have adverse effects on the health of the general population. Further research with consistent methodology is needed to clarify the magnitude of these effects and to show which populations and individuals are vulnerable.

Social impacts of ethnic tourism development on the minority communities in Guizhou Province, Southwest China. Full Text Available Since the beginning of the s, ethnic tourism has been oneof the key industries promoted by the government of Guizhouprovince in Southwestern China. This industry has broughttremendous changes to the communities of local ethnic peoplesin destination areas, especially in improving their economiclife.

However, although ethnic tourism does bring manypositive results to local peoples, it also has a negative sideas well. The author contends that if ethnic governments andresidents want to sustain their culture and society, they musthave an awareness and understanding of both the positive andnegative impacts of tourism when considering a project intheir community. Ma, Xiangxian; Zheng, Guodong, E-mail: gdzhbj mail. Iron species revealed that: 1 the oil-bearing reservoir rocks were changed by water-rock-oil interactions; 2 even in the same site, there was a different performance between sandstone and mudstone during the oil and gas infusion to the reservoirs ; and 3 this was evidence indicating the selective channels of hydrocarbon migration.

Mercury bioaccumulation in the food web of Three Gorges Reservoir China : Tempo-spatial patterns and effect of reservoir management. Hg concentrations in aquatic invertebrates and fish indicated a significant temporal trend associated with regular seasonal water-level manipulation. This includes water level lowering to allow for storage of water during the wet season summer ; a decrease of water levels from September to June providing a setting for flood storage.

Hg concentrations in organisms were the highest after flooding. Higher Hg concentrations in fish were observed at the location farthest from the dam. Hg concentrations in water and sediment were correlated. Climate and human impacts on vegetation changes in central Guizhou , China : Carbon and oxygen isotopic records in a stalagmite from Yelang Cave. Below 6 cm depth where the age suddenly changed from late Holocene to late Pleistocene, the stalagmite shows the deposition alternating between white-pure calcite layers and dark-dirty carbonate layers.

Prior to AD to This second deforestation event might be caused a strong immigration in early Qing Dynasty due to mining demand. Assessment of ecologically relevant hydrological change in China due to water use and reservoirs.