寒旱农业科学2025，Vol.4Issue(2)：124-128,5.DOI:10.3969/j.issn.2097-2172.2025.02.005
银北灌区土壤盐分多尺度空间变异特征分析
Characterization of Multi-scale Spatial Variability of Soil Salinity in the Yinbei Irrigation District
摘要
Abstract
Analyzing the distribution characteristics of saline-alkaline soils in different regions is the basis for accurate improvement of saline-alkaline lands.In this study,we analyzed the spatial distribution characteristics of soil salinity in the Yinbei irrigation district of Ningxia,providing a basis for saline-alkali land reclamation.Using the Yinbei irrigation district of Ningxia as the research object,classical and geostatistical methods were used to analyze the distribution characteristics and spatial variability of soil salinity at sampling scales of 6.0,1.0,and 0.2 km,respectively.The results showed that at the 6.0,1.0,and 0.2 km sampling scales,the salinity content of the surface soil(0 to 20 cm)in the study area was high and unevenly distributed with large variability,and the coefficients of variation(CV)were 0.927,0.932 and 1.187,respectively,indicating medium-high level of variability.The half-variance functions of the soil salinity at the three sampling scales were 32.653%,38.462%and 41.463%,respectively,indicating a moderate spatial autocorrelation.With the increase of sampling interval,the spatial autocorrelation of soil salinity increased.The influence of random factors such as planting,irrigation and fertilization on the spatial heterogeneity of soil salinity gradually weakened,whereas the influence of structural factors such as climate,hydrology,topography,and soilproperties on the spatial distribution of soil salinity was continuously enhanced.It is recommended to increase the sampling volume at small and medium scales,where random factors have a greater influence,in order to gain a deeper understanding of the spatial distribution characteristics and variability patterns of soil salinity.关键词
土壤盐分/多尺度/空间变异/银北灌区Key words
Soil salinity/Multi-scale/Spatial variability/Yinbei irrigation district分类
农业科技引用本文复制引用
吴霞,樊丽琴,王长军,张永宏..银北灌区土壤盐分多尺度空间变异特征分析[J].寒旱农业科学,2025,4(2):124-128,5.基金项目
宁夏自然科学基金(2022AAC03458) （2022AAC03458）
宁夏重点研发计划(2023BCF01050) （2023BCF01050）
国家重点研发计划子课题(2021YFD1900605-05). （2021YFD1900605-05）
