干旱区研究最新文献

{"title":"Study on the Effect of Agricultural Non-point Source Pollution to Water Environment of the Ebinur Lake Basin during High Flow Period","authors":"Gao Xiang","doi":"10.3724/SP.J.1148.2010.00278","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2010.00278","url":null,"abstract":"Sustainable utilization of water resources is the foundation and condition for sustainable socio-economic development.Healthy water environment and adequate pure water is an important guarantee for implementing the sustainable development strategy of China in 21 century.As a water carrier,river is an important component part of surface water resources and plays an important role in regional water environment and economic development.Agricultural non-point source pollution is a ubiquitous environment problem nowadays.It restricts directly the sustainable development of society and economy in the world and has aroused more attention.In this paper,an analytical method of comprehensive pollution index is used to evaluate the water environment quality in the Ebinur Lake Basin,and the distribution and concentrations of various forms of nitrogen and phosphorus in surface water samples collected in May 2008 are analyzed systematically.Through comparing with the standards of water quality category,the result shows that the water quality in the Ebinur Lake Basin during high flow period was polluted moderately.NO-3-N was the main pollutant in the Ebinur Lake Basin,and the concentrations of NO-3-N and TN in the Bortala River were 0.433 mg/L and 3.545 mg/L respectively,which were the highest in all the rivers.This result reveals that agricultural non-point source pollution was the main cause for the pollution of Bortala River,and this was also why the pollutants' concentrations in other rivers were lower than those in it.The concentrations of NH+4-N in the Kuytun River and Jinghe River were 0.251 mg/L and 0.249 mg/L respectively,higher than those in other rivers,which reveals that human activities played a dominant role in polluting the water environment of two rivers.In addition,the total phosphorus and nitrogen concentrations were very high at all the sampling sites,especially along the Bortala River,where the total phosphorus concentration was higher than that of water quality standard V.In conclusion,the water environment quality in the Ebinur Lake Basin has been eutrophicated on the whole.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2010-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69829603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis on Interspecific Relationship of the Dominant Plant Species in the Ebinur Lake Wetland Nature Reserve, Xinjiang: Analysis on Interspecific Relationship of the Dominant Plant Species in the Ebinur Lake Wetland Nature Reserve, Xinjiang","authors":"Y. Xiaodong, F. De-ping, Yuan Yue, Yang Jun, Lu Guanghui","doi":"10.3724/SP.J.1148.2010.00249","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2010.00249","url":null,"abstract":"According to the classification of the typical plant communities in the Ebinur Lake Wetland Nature Reserve,45 sample plots of 10 m×10 m were delimited around the reserve at the Dongdaqiao and Yaziwan management stations to record the quantitative community features including the species,abundance,height,stem diameter and crown diameter as well as the elevation,latitude,longitude,circumstance,geographical features and terrain of each sample plot during the period from June to September 2007.The χ2-test,contingency table,VR,Ochiai association index,Pearson's correlation coefficient and Spearman's correlation coefficient are used to study the interspecific relationships among the 25 main species in the typical communities in the Ebinur Lake Wetland Nature Reserve.The results are as follows:(1) The species of vegetation in the typical communities in the reserve are mainly composed of the families of Salicaceae,Tamaricaceae,Gramineae,Chenopodiaceae and Fabaceae,the species composition is poor,and 28 species samples were collected in the sample plots.The important value of Populus euphratica is the highest,and then it is followed by Halostachys caspica,Halocnemum strobilaceum,Aeluropus pungens and Glycyrrhiza uralensis.P.euphratica is the primary species in the study area and also the dominant one of the arbor layer,while H.strobilaceum,A.pungens and G.uralensis are separately the dominant plants of the shrub layer and herbage layer;(2) The total associations among all the species in the Ebinur Lake Wetland Nature Reserve are unremarkable negatively significant,and the unremarkable couples of species account for the highest proportion;the plant communities tend to grow independently.The results of χ2-test with contingency table also reveal that the associations between most of the pairs in the communities are remotely related,if so,the pairs of positive association will overweigh negative one,which shows that there is more mutual contribution among the associated species,and one's existence benefits another although the effect is unremarkable.There are more remarkably relative coefficients among the herbages,such as A.pungens,G.uralensis,Asparagus persicus,Alhagi sparsifolia and the other species than that of the arbors and shrubs,such as Tamarix ramosissima,H.strobilaceum,Reaumuria soogarica,Haloxylon ammodendron,P.euphratica,etc.The fact that the herbages are widely distributed over the investigated area indicates that these plants have a higher level of maturity and coexist with other species.The arbors and shrubs are comparatively more competitive than other species in making use of special resources.Based on the study of affinity in the Ebinur Lake Wetland Nature Reserve,Spearman's correlation coefficient is more sensitive to the affinity among species and higher compared with Pearson's correlation coefficient.Ochiai association indexes and the χ2-test with contingency table are consistent with each other;(3) Species with similar nature in the com","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"27 1","pages":"249-256"},"PeriodicalIF":0.0,"publicationDate":"2010-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69829724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Indexes and Methods of Regionalization for Sandy Desertification Prevention and Control in Xinjiang: Indexes and Methods of Regionalization for Sandy Desertification Prevention and Control in Xinjiang","authors":"Jianyong Yue, A. Yasheng, L. Lan, Hongying Cheng","doi":"10.3724/SP.J.1148.2010.00309","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2010.00309","url":null,"abstract":"","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"27 1","pages":"309-318"},"PeriodicalIF":0.0,"publicationDate":"2010-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69830490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characteristics of Topsoil Nutrients in the Pirichy River Basin, Ili, Xinjiang: Characteristics of Topsoil Nutrients in the Pirichy River Basin, Ili, Xinjiang","authors":"You Li, Hua-rong Zhou, Haifeng Hou","doi":"10.3724/SP.J.1148.2010.00290","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2010.00290","url":null,"abstract":"","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"27 1","pages":"290-296"},"PeriodicalIF":0.0,"publicationDate":"2010-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69829729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lanalysis on Land Use Change and Its Driving Factors in Ecological Fragile Region—A Case Study in Zhangye City: Lanalysis on Land Use Change and Its Driving Factors in Ecological Fragile Region—A Case Study in Zhangye City","authors":"Guan Bing, P. Shi, Ling-hua Ju","doi":"10.3724/SP.J.1148.2010.00169","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2010.00169","url":null,"abstract":"Based on the detailed survey data of land use change during the period from 1996 to 2006,this paper analyzes the area structure,degree and regional difference of land use change in Zhangye City,an ecological fragile region in the central Hexi Corridor of Gansu Province,China.The results show that the range and degree of land use change are quite large,the areas of farmland,steppe and unused land are reduced,but those of garden plots,woodland and building land are enlarged.Furthermore,the land use degree is holistically increased,in Minle County,for example,the proportion of farmland area is as high as 26%.Regional difference of land use change is obvious,for example,the relative change rate of farmland in Minle County is 3.32,but it is only 0.18 in Gaotai County.The land desertification,soil salinization or alkalization and biodiversity reduction become more serious.The main driving factors of land use change are changes of the natural conditions,policy,economic development,population variation,urbanization and technological innovation.","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"27 1","pages":"169-175"},"PeriodicalIF":0.0,"publicationDate":"2010-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69828756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment on Climate Change Vulnerability of Ecosystems in the Shiyang River Basin: Assessment on Climate Change Vulnerability of Ecosystems in the Shiyang River Basin","authors":"Landong Sun, L. Yue, Hui Guo","doi":"10.3724/SP.J.1148.2010.00204","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2010.00204","url":null,"abstract":"","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"27 1","pages":"204-210"},"PeriodicalIF":0.0,"publicationDate":"2010-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69828804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Taxonomic Study on Astragalus L. in the Pamirs, China: A Taxonomic Study on Astragalus L. in the Pamirs, China","authors":"Wei Zhai, P. Yan, Zhen-xia Ma","doi":"10.3724/SP.J.1148.2010.00263","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2010.00263","url":null,"abstract":"","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2010-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69829913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Method for Extracting Genomic DNA from Desert Tenebrionid Insects: A New Method for Extracting Genomic DNA from Desert Tenebrionid Insects","authors":"Xuan Liu, Fu-chun Zhang, Ji Ma","doi":"10.3724/SP.J.1148.2009.00582","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00582","url":null,"abstract":"","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"582-585"},"PeriodicalIF":0.0,"publicationDate":"2010-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69823639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Alxa region; desertification; sand-source field of sandstorm; strategic countermeasure.: Alxa region; desertification; sand-source field of sandstorm; strategic countermeasure.","authors":"Baihua Zhang, Xue-qin Zhang, Yong-hui Yao, Fang Han","doi":"10.3724/SP.J.1148.2009.00453","DOIUrl":"https://doi.org/10.3724/SP.J.1148.2009.00453","url":null,"abstract":"","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"26 1","pages":"453-459"},"PeriodicalIF":0.0,"publicationDate":"2010-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69822551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Study on the Formation Mechanisms of Condensed Water in a Wind-blown Sand Area in the Ordos Basin","authors":"W. Zhe","doi":"10.3724/sp.j.1148.2009.00496","DOIUrl":"https://doi.org/10.3724/sp.j.1148.2009.00496","url":null,"abstract":"","PeriodicalId":8385,"journal":{"name":"干旱区研究","volume":"1 1","pages":"496-501"},"PeriodicalIF":0.0,"publicationDate":"2010-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69822899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}