Abdirahman·Halik.Spatial Variability and Distribution Characteristics Research of the Soil Salinity Yuepuhu County in Xinjiang[J].Research of Soil and Water Conservation,2011,18(01):97-100.
新疆岳普湖县土壤盐分空间变异及其分布特征研究
- Title:
- Spatial Variability and Distribution Characteristics Research of the Soil Salinity Yuepuhu County in Xinjiang
- Keywords:
- geostatistics; soil salinity; spatial variability; Tarim River
- 分类号:
- S156.41
- 摘要:
- 基于区域变量理论，采用GPS定位技术，于2005年7-8月，对岳普湖县土壤进行定点取样，土壤取样层次为0-30 cm、30-60 cm、60-100 cm和100-200 cm，共取样点118个。在GIS技术支持下，通过地统计学半变异函数和Kriging空间插值，定量分析岳普湖县不同层次土壤盐分的空间异质性。结果表明：岳普湖县各层土壤含盐量普遍较高，均值分别为17.44，11.67，9.10，8.14 g/kg，且变异性大、变异系数为0.877～0.959，接近于强变异性。0-30 cm、30-60 cm和60-100 cm土壤盐分的理论分布模型属于指数模型，100-200 cm属于球状模型。各层土壤盐分空间相关性均属于中等程度。不同土层之间的空间自相关范围具有明显的差异，由表层至深层，土壤盐分的自相关范围逐渐增大。在空间格局上，岳普湖县土壤盐渍化极其严重，0-30 cm土层，强度盐渍化面积占总面积的40.42%，盐土47.87%。水平方向上，土壤盐分的高值区主要分布在岳普湖镇、岳普湖乡、色也克乡、阿其克乡和铁热木乡。研究成果可为岳普湖县防治土壤次生盐碱化及其合理利用水土资源方面提供决策依据。
- Abstract:
- Based on the regional variable theory, using GPS positioning technology, from July to August in 2005, according to Yuepuhu County designated soil sampling, soil sampling levels of 0-30 cm, 30-60 cm, 60-100 cm, and 100-200 cm, a total of 118 sampling points, with the GIS technical supporting, the statistic’ semi-varfogram and kriging spatial interpolation, quantitative analysis Yuepuhu County at different levels of spatial heterogeneity of soil salinity. The results show that: Yuepuhu County, generally high levels of soil salinity, the means of soil salinity are 17.44 g/kg, 11.67 g/kg, 9.10 g/kg and 8.14 g/kg. And the variability is large, the coefficient of variation is 0.877～0.959, close to the strong variability. 0-30 cm, 30-60 cm, and 60-100 cm, soil salt distribution model for the theoretical part of exponential model, 100-200 cm are spherical model. Spatial correlations of soil salt levels belong to moderate. Between the different layers of spatial autocorrelation, a clear difference in the scope, from surface to depth, soil salinity increased gradually from the related areas. In the space character, the salinization of Yuepuhu County are dire adjective, the layers of 0-30 cm, areas which soil salinization happened heavily take up 40.42% of the total, and solonchak is 47.87%. In the horizontal direction, spatial pattern of soil salinity, mainly in high-value areas located in Yuepuhu Town, Yuepuhu County, Seyeke County, Aqike County and Tieremu County. Research efforts to prevent Yuepuhu County soil secondary salinization and reasonable use of soil resources to provide the basis of decisions.
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备注/Memo
收稿日期:2010-3-22;改回日期:2010-7-2。
基金项目:国家重点基础研究项目（G1999043508）；国家自然科学基金项目（41061052）
作者简介:阿布都热合曼·哈力克（1967- ），男（维吾尔族），新疆乌鲁木齐人，副教授，研究方向为干旱区资源环境。E-mail：tag9710@sina.com