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当前位置: 首页 > 文章 > 近20a渭干河绿洲土壤盐分变化特征 干旱区研究 2015,32 (6) 1076-1081
Position: Home > Articles > Changing Characteristics of Soil Salt in Weigan River Oasis for the Last 20 Years Arid Zone Research 2015,32 (6) 1076-1081

近20a渭干河绿洲土壤盐分变化特征

作  者：
王丹丹;程猛;杨瑞红;赵成义;丁建丽
单  位：
新疆教育学院;中国科学院新疆生态与地理研究所;中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室中国科学院大学;新疆大学资源与环境科学学院
关键词：
绿洲;土壤;盐分;空间变异;地统计学;渭干河
摘  要：
土壤盐分空间分布和变化特征是了解水盐运移规律的关键,运用地统计学和GIS技术相结合的方法,研究近20 a渭干河绿洲土壤盐分变化特征。结果表明:1992年、2012年0~20 cm、0~100 cm土壤盐分呈现强变异性,且均呈现中等空间自相关性,空间相关距离分别为27.95 km和6.23 km。土壤盐分含量高的区域集中在渭干河绿洲的东南和西南的局部地区,同时呈现出表聚现象,土壤盐渍化由绿洲内部向外部转移,由中上部向下部转移。与1992年相比,2012年表层盐分减少,中度、重度、盐渍化土地的面积分别减少了422.7、818.19、1 489.38 km2,非盐渍化土地的面积增加了1 579.65 km2,轻度盐渍化土地的面积增加了1 150.61 km2,总体上土壤盐渍化趋势向好,表明绿洲环境质量趋良。
译  名：
Changing Characteristics of Soil Salt in Weigan River Oasis for the Last 20 Years
作  者：
WANG Dan-dan;CHENG Meng;YANG Rui-hong;ZHAO Cheng-yi;DING Jian-li;ZHANG Xiao-lei;State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences;College of Resource and Environment Sciences,Xinjiang University;University of Chinese Academy of Sciences;Agriculture Technology Extension Station of Xinhe County;Xinjiang Education Institute;
关键词：
oasis;;soil;;salt;;spatial variability;;geostatistics;;Weigan River
摘  要：
Soil salinization is the important obstacle of sustainable development of oasis in arid areas. Soil is historical life continuum,there is the variation of time and space. The spatial distribution and characteristic change of soil salinity is the key to understand the water and salinity transportation law. As the development of land use and the surface water exploitation,increasing the of human activity influence,salt circulation within the oasis have changed greatly. We adopt the methodology which combines geostatistics and GIS technique to investigate the soil salt change characteristic in Weigan Oasis in recent 20 year. The results demonstrate that the soil salt within 0-20 cm and 0-100 cm displayed strong mutation in 1992 and 2012. Moreover,both soil salt showed medium spatial autocorrelation and the spatial correlated distance are 27. 95 km and 6. 23 km,respectively. The area processing high content of soil salt focus on local areas of southeast and southwest of Weigan Oasis,along with the surface aggregation phenomenon,and soil salinization shifting from interior to exterior and from upper to bottom of the oasis.Compared to 1992,the surface salt decreased in 2012,and the medium,severe and salinized land area decreased by 422. 7,818. 19,1 489. 38 km2,respectively. The none-salinized land area increased by 1 579. 65 km2 and slightly salinized land increased by 1 150. 61 km2. In general the soil salinization show a positive trend,indicating the oasis environment is superior.

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