| 生物土壤与生态 |
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| Spatial and Temporal Dynamics of Oasis Soil Salinization in Upper and Middle Reaches of Sangonghe River, Northwest China |
| WANG Yu-gang1, XIAO Du-ning1,2, LI Yan1 |
| 1.Xinjiang Institute of Ecology and Geography, Chinese Academy of Science, Urumqi 830011, China; 2.Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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Abstract Aiming at the problem of soil salinization existed inside oasis a case study was carried out on the Fukang oasis in upper and middle reaches of Sangonghe River basin. The spatial and temporal distributing characteristics of soil salinity in the topsoil (0—20 cm) and its key influencing factor were studied with the combination of methods in geo-statistics, GIS and RS. The result showed that: ①Transition between landscape types was frequent, and the process of oasization was faster than desertification in Fukang oasis; ②Spherical model was fitted for both data sets in 1982 and 2005, with high level of confidence after F-test;③Mapping of soil salinity by Kriging and its comparison with land use maps showed that the degree of soil salinization in south oasis was lower than that in north oasis, and there was a trend of moving from south to north; ④The degree of soil salinizaiton in south oasis was weaken by agricultural irrigation, but the degree of soil salinization in north was intensified by groundwater action.
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Received: 18 April 2007
Published: 20 May 2008
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[1]Jordán M M,Navarro-Pedreo J,García-Sánchez E,et al.Spatial dynamics of soil salinity under arid and semi-arid conditions:geological and environmental implications[J].Environmental Geology,2003,45(4):448-456.
[2]张小由,龚家栋,周茂先.额济纳三角洲土壤盐分特征分析[J].中国沙漠,2004,24(4):442-447.
[3]Masoud A A,Koike K.Arid land salinization detected by remotely-sensed landcover changes:A case study in the Siwa region,NW Egypt[J]. Journal of Arid Environments,2006,66:151-167.
[4]Amezketa E.An integrated methodology for assessing soil salinization,a pro-condition for land desertification[J].Journal of Arid Environments,2006,67:594-606.
[5]田长彦,宋郁东,胡明芳.新疆荒漠化现状、成因及对策[J].中国沙漠,1999,19(3):214-218.
[6]郭占荣,刘花台.西北内陆灌区土壤次生盐渍化与地下水动态调控[J].农业环境保护,2002,21(1):45-48.
[7]刘恒,钟华平,顾颖.西北干旱内陆河区水资源利用与绿洲演变规律研究[J].水科学进展,2001,12(3):378-384.
[8]潘晓玲.干旱区绿洲生态系统动态稳定性的初步研究[J].第四纪研究,2001,21(4):345-350.
[9]温小虎,仵彦卿,苏建平,等.额济纳盆地地下水盐化特征及机理分析[J].中国沙漠,2006,26(5):836-841.
[10]张勃,孟宝,郝建秀,等.干旱区绿洲-荒漠带土壤水盐异质性及生态环境效应研究——以黑河中游张掖绿洲为例[J].中国沙漠,2006,26(1):81-84.
[11]Herrero J, Pe′rez-Coveta O.Soil salinity changes over 24 years in a Mediterranean irrigated district[J].Geoderma,2005,125:287-308.
[12]王政权.地统计学及其在生态学中的应用[M].北京:科学出版社,1999:26-98.
[13]马风云,李新荣,张景光,等.沙坡头固沙植被若干物理因子的空间异质性研究[J].中国沙漠,2005,25(2):207-215.
[14]Chang Y H, Scrimshaw M D,Emmerson R H C,et al.Geostatistical analysis of sampling uncertainty at the Tollesbury Managed Retreat site in Black water Estuary,Essex,UK:Kriging and Cokriging approach to minimize sampling density[J].The Science of the Total Environment,1998,221:43-57.
[15]赵良菊,肖洪浪,郭天文,等.甘肃灌漠土土壤肥力的空间变异性典型研究[J].中国沙漠,2004,24(4):451-455.
[16]Zhang C S,McGrath D.Geostatistical and GIS analyses on SOC concentrations in grassland of southeastern Ireland from two different periods[J].Geoderma,2004,119:261-275. |
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2008, Vol. 28 
