玛河灌区膜下滴灌棉田表层土壤盐分空间变异性
发布时间：2018-11-07 18:07
【摘要】：应用区域采样点数据,结合地统计学与空间简单克里金插值等分析方法,分析了玛纳斯河流域中游平原灌区膜下滴灌棉田表层土壤盐分的空间变异性。结果表明:棉花采收后表层土壤含盐量变异系数为35.617%,表现为中等强度变异性,服从正态分布;具有强二阶趋势效应,灌区中部趋势影响力变化剧烈;块金系数小于25%,具有很强的空间相关性,其变异主要受空间结构性因素的影响;沿等高线方向表现为各向异性,垂直等高线方向表现为各向同性;棉花采收后表层土壤含盐量具有明显的连续变化,灌区内不存在盐土、重度盐化土和中度盐化土,轻度盐化土在整个灌区占主导地位并广泛分布于各子灌区,非盐化土主要分布在南部山前地区和东北局部地区。
[Abstract]:The spatial variability of surface soil salinity of drip irrigation cotton field under film in middle reaches of Manas River Basin was analyzed by using regional sampling point data combined with geostatistics and spatial simple Kriging interpolation. The results showed that the coefficient of variation of salt content in surface soil was 35.617, which showed medium intensity variability and normal distribution, and had a strong second order trend effect and a sharp change of trend influence in the middle part of irrigated area. The block gold coefficient is less than 25, which has strong spatial correlation, and its variation is mainly affected by spatial structural factors, anisotropy along the contour direction and isotropy in the vertical contour direction. The salt content of surface soil changed continuously after cotton harvest. There was no salinized soil in irrigation area, severe salinized soil and moderate salinized soil, and mild salinized soil dominated the whole irrigated area and was widely distributed in various irrigation areas. The non-salinized soil mainly distributes in the south mountain front area and the northeast part area.
【作者单位】： 石河子大学水利建筑工程学院;现代节水灌溉兵团重点试验室;
【基金】：NSFC-新疆联合基金项目(U1203282) 国家自然科学基金(51669030) 石河子大学优秀青年项目(2013ZRKXYQ17)
【分类号】：S156.4
本文编号：2317157
[Abstract]:The spatial variability of surface soil salinity of drip irrigation cotton field under film in middle reaches of Manas River Basin was analyzed by using regional sampling point data combined with geostatistics and spatial simple Kriging interpolation. The results showed that the coefficient of variation of salt content in surface soil was 35.617, which showed medium intensity variability and normal distribution, and had a strong second order trend effect and a sharp change of trend influence in the middle part of irrigated area. The block gold coefficient is less than 25, which has strong spatial correlation, and its variation is mainly affected by spatial structural factors, anisotropy along the contour direction and isotropy in the vertical contour direction. The salt content of surface soil changed continuously after cotton harvest. There was no salinized soil in irrigation area, severe salinized soil and moderate salinized soil, and mild salinized soil dominated the whole irrigated area and was widely distributed in various irrigation areas. The non-salinized soil mainly distributes in the south mountain front area and the northeast part area.
【作者单位】： 石河子大学水利建筑工程学院;现代节水灌溉兵团重点试验室;
【基金】：NSFC-新疆联合基金项目(U1203282) 国家自然科学基金(51669030) 石河子大学优秀青年项目(2013ZRKXYQ17)
【分类号】：S156.4
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