In China, 10 ethnic minorities with a combined population of over 20 million people are followers of Islam. In Ningxia Hui Autonomous Region, the population is nearly 6 million, a-mong which the Islamic population is ...In China, 10 ethnic minorities with a combined population of over 20 million people are followers of Islam. In Ningxia Hui Autonomous Region, the population is nearly 6 million, a-mong which the Islamic population is about 2 million. In China as a whole, more than 20 million people enjoy eating food prepared according to Islamic guidelines, known as hal'al food.展开更多
The Weining Beishan area of Ningxia Hui Autonomous Region is located at on the western edge of the Helanshan tectonic belt,which is a tectonic joint among Alxa Block,Ordos Block,and North Qilian orogenic belt.However,...The Weining Beishan area of Ningxia Hui Autonomous Region is located at on the western edge of the Helanshan tectonic belt,which is a tectonic joint among Alxa Block,Ordos Block,and North Qilian orogenic belt.However,the tectonic evolution of this area remains unclear due to the lack of magmatic information.This paper conducted researches on geochronology,geochemistry,and Sr-Nd-Hf isotopes of the diorite porphyrites exposed in the Weining Beishan area.The zircon U-Pb dating yields two ages of 145.0±1.1 and 146.2±1.5 Ma,and the whole-rock geochemical data indicate that the diorite porphyrites are metaluminous to weakly peraluminous and high-K calc-alkaline series.The characteristics of highly initial^(87)Sr/^(86)Sr ratios(0.70816 to 0.71047),negativeε_(Nd)(t)(−8.9 to−8.4),and negativeε_(Hf)(t)(−13.8 to−21.2)indicate that the diorite porphyrites originated from partial melting of the middle-lower ancient crust related to the North China Craton.Combined with the regional geology,we suggested that partial melting was triggered by a tectonic activity of deep faults cutting through the crust under the regional stress transformation from compressing to extension during the Late Jurassic–Early Cretaceous,which is probably related to the westward subduction of the Paleo-Pacific Plate.展开更多
More than 240 items of historical records containing climatic information were retrieved from official historical books, local chronicles, annals and regional meteorological disaster yearbooks. By using moisture index...More than 240 items of historical records containing climatic information were retrieved from official historical books, local chronicles, annals and regional meteorological disaster yearbooks. By using moisture index and flood/drought (F/D) index obtained from the above information, the historical climate change, namely wet-dry conditions in borderland of Shaanxi Province, Gansu Province and Ningxia Hui Autonomous Region (BSGN, mainly included Ningxialu, Hezhoulu, Gongchanglu, Fengyuanlu and Yan'anlu in the Yuan Dynasty) was studied. The results showed that the climate of the region was generally dry and the ratio between drought and flood disasters was 85/38 during the period of 1208-1369. According to the frequencies of drought-flood disasters, the whole period could be divided into three phases. (1) 1208-1240: drought dominated the phase with occasional flood disasters. (2) 1240-1320: long-time drought disasters and extreme drought events happened frequently. (3) 1320-1369: drought disasters were less severe when flood and drought disasters happened alternately. Besides, the reconstructed wet-dry change curve revealed obvious transition and periodicity in the MongoI-Yuan Period. The transitions occurred in 1230 and 1325. The wet-dry change revealed 10- and 23-year quasi-periods which were consistent with solar cycles, indicating that solar activity had affected the wet-dry conditions of the study region in the Mongol-Yuan Period. The reconstructed results were consistent with two other study results reconstructed from natural evidences, and were similar to another study results from historical documents. All the above results showed that the climate in BSGN was characterized by long-time dry condition with frequent severe drought disasters during 1258 to 1308. Thus, these aspects of climatic change, might have profound impacts on local vegetation and socio-economic system.展开更多
[Objective]This study was to reveal the photo-physiological properties and suitable climate conditions for potato growth,so as to improve potato quality and yield by making use of the climate resources in Ningxia Hui ...[Objective]This study was to reveal the photo-physiological properties and suitable climate conditions for potato growth,so as to improve potato quality and yield by making use of the climate resources in Ningxia Hui Autonomous Region,to intensively develop the special agriculture there to enhance the economic benefit of local people.[Method]Using CIRASⅠ-Portable Photosynthesis System,we measured the daily change of photo-physiological indices of potato and further analyzed their relationship with daily weather change,and investigated the impacts of climate factors including atmospheric temperature,humidity,CO2 concentration and light intensity on various physiological indices of potato at key growth stages(flowering stage and stem-swelling stage).[Results]The results showed that(1) humidity in experimental field assumed a " U" type cosine variation curve,while photosynthetically active radiation and atmospheric temperature presented a reverse variation trend;(2) atmospheric CO2 concentration was positively correlated with intercellular CO2 concentration of potato cells,both assumed double " W" type curve for daily change;(3) during growth period of potato,in the sunny days with appropriate relative humidity,physiological indices including photosynthetic rate,transpiration rate and stomatal conductance presented similar change law with environmental factor photosynthetically active radiation,all appearing an " M" type curve with double peaks and a typical midday depression;(4) midday depression caused by to higher light intensity always appeared simultaneously with the maximum and minimum of air temperature.[Conclusion]Our results provided scientific basis for the large scale production of potato in Ningxia Hui Autonomous Region.展开更多
Background:Cystic echinococcosis(CE)and alveolar echinococcosis(AE)are highly endemic in Xiji County of Ningxia Hui Autonomous Region(NHAR)in China where the control campaign based on dog de-worming with praziquantel ...Background:Cystic echinococcosis(CE)and alveolar echinococcosis(AE)are highly endemic in Xiji County of Ningxia Hui Autonomous Region(NHAR)in China where the control campaign based on dog de-worming with praziquantel has been undertaken over preceding decades.This study is to determine the current prevalence of Echinococcus granulosus and E.multilocularis in domestic dogs and monitor the echinococcosis transmission dynamics.Methods:Study villages were selected using landscape patterns(Geographic Information System,GIS)for Echinococcus transmission“hot spots”,combined with hospital records identifying risk areas for AE and CE.A survey of 750 domestic dogs,including copro-sampling and owner questionnaires,from 25 selected villages,was undertaken in 2012.A copro-multiplex PCR assay was used for the specific diagnosis of E.granulosus and E.multilocularis in the dogs.Data analysis,using IBM SPSS Statistics,was undertaken,to compare the prevalence of the two Echinococcus spp.in dogs between four geographical areas of Xiji by theχ^(2)test.Univariate analysis of the combinations of outcomes from the questionnaire and copro-PCR assay data was carried out to determine the significant risk factors for dog infection.Results:The highest de-worming rate of 84.0%was found in the northwest area of Xiji County,and significant differences(P<0.05)in the de-worming rates among dogs from the four geographical areas of Xiji were detected.The highest prevalence(19.7%,59/300)of E.multilocularis occurred in northwest Xiji,though the highest prevalence(18.1%,38/210)of E.granulosus occurred in southwest Xiji.There was no significant difference(P>0.05)in the prevalence of E.granulosus in dogs from the northwest,southwest,northeast,and southeast of Xiji,but there were significant differences(P<0.05)between dogs infected with E.multilocularis from the four areas.None of the other independent variables was statistically significant.Conclusions:The results from this study indicate a high prevalence of both E.granulosus and E.muiltilocularis in dogs in Xiji County,NHAR.Transmission of E.multilocularis was more impacted by geographical risk-factors in Xiji County than that of E.granulosus.Dogs have the potential to maintain the transmission of both species of Echinococcus within local Xiji communities,and the current praziquantel dosing of dogs appears to be ineffective or poorly implemented in this area.展开更多
文摘In China, 10 ethnic minorities with a combined population of over 20 million people are followers of Islam. In Ningxia Hui Autonomous Region, the population is nearly 6 million, a-mong which the Islamic population is about 2 million. In China as a whole, more than 20 million people enjoy eating food prepared according to Islamic guidelines, known as hal'al food.
文摘The Weining Beishan area of Ningxia Hui Autonomous Region is located at on the western edge of the Helanshan tectonic belt,which is a tectonic joint among Alxa Block,Ordos Block,and North Qilian orogenic belt.However,the tectonic evolution of this area remains unclear due to the lack of magmatic information.This paper conducted researches on geochronology,geochemistry,and Sr-Nd-Hf isotopes of the diorite porphyrites exposed in the Weining Beishan area.The zircon U-Pb dating yields two ages of 145.0±1.1 and 146.2±1.5 Ma,and the whole-rock geochemical data indicate that the diorite porphyrites are metaluminous to weakly peraluminous and high-K calc-alkaline series.The characteristics of highly initial^(87)Sr/^(86)Sr ratios(0.70816 to 0.71047),negativeε_(Nd)(t)(−8.9 to−8.4),and negativeε_(Hf)(t)(−13.8 to−21.2)indicate that the diorite porphyrites originated from partial melting of the middle-lower ancient crust related to the North China Craton.Combined with the regional geology,we suggested that partial melting was triggered by a tectonic activity of deep faults cutting through the crust under the regional stress transformation from compressing to extension during the Late Jurassic–Early Cretaceous,which is probably related to the westward subduction of the Paleo-Pacific Plate.
基金National Natural Science Foundation of China, No.40471047 No.40871033The Knowledge Innovation Program of Chinese Academy of Sciences, No.KZCX2-YW-315
文摘More than 240 items of historical records containing climatic information were retrieved from official historical books, local chronicles, annals and regional meteorological disaster yearbooks. By using moisture index and flood/drought (F/D) index obtained from the above information, the historical climate change, namely wet-dry conditions in borderland of Shaanxi Province, Gansu Province and Ningxia Hui Autonomous Region (BSGN, mainly included Ningxialu, Hezhoulu, Gongchanglu, Fengyuanlu and Yan'anlu in the Yuan Dynasty) was studied. The results showed that the climate of the region was generally dry and the ratio between drought and flood disasters was 85/38 during the period of 1208-1369. According to the frequencies of drought-flood disasters, the whole period could be divided into three phases. (1) 1208-1240: drought dominated the phase with occasional flood disasters. (2) 1240-1320: long-time drought disasters and extreme drought events happened frequently. (3) 1320-1369: drought disasters were less severe when flood and drought disasters happened alternately. Besides, the reconstructed wet-dry change curve revealed obvious transition and periodicity in the MongoI-Yuan Period. The transitions occurred in 1230 and 1325. The wet-dry change revealed 10- and 23-year quasi-periods which were consistent with solar cycles, indicating that solar activity had affected the wet-dry conditions of the study region in the Mongol-Yuan Period. The reconstructed results were consistent with two other study results reconstructed from natural evidences, and were similar to another study results from historical documents. All the above results showed that the climate in BSGN was characterized by long-time dry condition with frequent severe drought disasters during 1258 to 1308. Thus, these aspects of climatic change, might have profound impacts on local vegetation and socio-economic system.
基金Supported by National Natural Science Foundation of China(40765003)~~
文摘[Objective]This study was to reveal the photo-physiological properties and suitable climate conditions for potato growth,so as to improve potato quality and yield by making use of the climate resources in Ningxia Hui Autonomous Region,to intensively develop the special agriculture there to enhance the economic benefit of local people.[Method]Using CIRASⅠ-Portable Photosynthesis System,we measured the daily change of photo-physiological indices of potato and further analyzed their relationship with daily weather change,and investigated the impacts of climate factors including atmospheric temperature,humidity,CO2 concentration and light intensity on various physiological indices of potato at key growth stages(flowering stage and stem-swelling stage).[Results]The results showed that(1) humidity in experimental field assumed a " U" type cosine variation curve,while photosynthetically active radiation and atmospheric temperature presented a reverse variation trend;(2) atmospheric CO2 concentration was positively correlated with intercellular CO2 concentration of potato cells,both assumed double " W" type curve for daily change;(3) during growth period of potato,in the sunny days with appropriate relative humidity,physiological indices including photosynthetic rate,transpiration rate and stomatal conductance presented similar change law with environmental factor photosynthetically active radiation,all appearing an " M" type curve with double peaks and a typical midday depression;(4) midday depression caused by to higher light intensity always appeared simultaneously with the maximum and minimum of air temperature.[Conclusion]Our results provided scientific basis for the large scale production of potato in Ningxia Hui Autonomous Region.
基金This study was funded by the Science Fund for Gansu Provincial Key Science and Technology Projects(No.1203NKDA039)Special Fund for Agro-scientific Research in the Public Interest(No.200903036–07,201303037)+3 种基金West China Top Class Discipline Project in Basic Medical Sciences,Ningxia Medical UniversityThe National Natural Science Foundation of China(No.3096033981460311)the Australian National Health and Medical Research Council(NHMRC)(project grant No.APP 1009539).
文摘Background:Cystic echinococcosis(CE)and alveolar echinococcosis(AE)are highly endemic in Xiji County of Ningxia Hui Autonomous Region(NHAR)in China where the control campaign based on dog de-worming with praziquantel has been undertaken over preceding decades.This study is to determine the current prevalence of Echinococcus granulosus and E.multilocularis in domestic dogs and monitor the echinococcosis transmission dynamics.Methods:Study villages were selected using landscape patterns(Geographic Information System,GIS)for Echinococcus transmission“hot spots”,combined with hospital records identifying risk areas for AE and CE.A survey of 750 domestic dogs,including copro-sampling and owner questionnaires,from 25 selected villages,was undertaken in 2012.A copro-multiplex PCR assay was used for the specific diagnosis of E.granulosus and E.multilocularis in the dogs.Data analysis,using IBM SPSS Statistics,was undertaken,to compare the prevalence of the two Echinococcus spp.in dogs between four geographical areas of Xiji by theχ^(2)test.Univariate analysis of the combinations of outcomes from the questionnaire and copro-PCR assay data was carried out to determine the significant risk factors for dog infection.Results:The highest de-worming rate of 84.0%was found in the northwest area of Xiji County,and significant differences(P<0.05)in the de-worming rates among dogs from the four geographical areas of Xiji were detected.The highest prevalence(19.7%,59/300)of E.multilocularis occurred in northwest Xiji,though the highest prevalence(18.1%,38/210)of E.granulosus occurred in southwest Xiji.There was no significant difference(P>0.05)in the prevalence of E.granulosus in dogs from the northwest,southwest,northeast,and southeast of Xiji,but there were significant differences(P<0.05)between dogs infected with E.multilocularis from the four areas.None of the other independent variables was statistically significant.Conclusions:The results from this study indicate a high prevalence of both E.granulosus and E.muiltilocularis in dogs in Xiji County,NHAR.Transmission of E.multilocularis was more impacted by geographical risk-factors in Xiji County than that of E.granulosus.Dogs have the potential to maintain the transmission of both species of Echinococcus within local Xiji communities,and the current praziquantel dosing of dogs appears to be ineffective or poorly implemented in this area.