1989—2019年宁夏银北灌区土壤盐渍化时空变化分析  

Temporal and spatial variation analysis of soil salinization in Yinbei irrigation area of Ningxia from 1989 to 2019

作　　者：吴霞[1] 王长军[1] 樊丽琴[1] 李磊 张永宏[1] WU Xia;WANG Zhang-jun;FAN Li-qin;LI Lei;ZHANG Yong-hong(Institute of Agricultural Resources and Environment,Ningxia Academy of Agriculture and Forestry Sciences,Yinchuan 750002,China)

机构地区：[1]宁夏农林科学院农业资源与环境研究所,银川750002

出　　处：《湖北农业科学》2020年第23期73-76,93,共5页Hubei Agricultural Sciences

基　　金：宁夏自治区自然基金项目(2019AAC03290);宁夏青年科技人才托举项目(TJGC2018055);宁夏农林科学院科技创新全产业链项目(NKYZ-16-0907)。

摘　　要：以宁夏银北灌区为研究区域,以遥感影像为数据源,提取了银北地区1989年、1999年、2009年和2019年4期土壤盐渍化类型分类图,采用空间统计分析方法分析了研究区的土壤盐渍化演变特征。结果表明,从时间变化来看,1989—2019年银北地区盐渍化耕地总体呈增加趋势,其中1989—2009年增幅较大,2009—2019年增加较少;从空间演变来看,盐渍化程度从集中分布逐渐过渡到碎片化分布;从转移矩阵看,1989—2019年银北地区土壤盐渍化类型之间转换较为复杂,非盐渍化耕地与轻度、中度盐渍化耕地之间转移面积较大。Yinbei irrigation area of Ningxia was choosed as the research object and remote sensing image was taken as the data source.Based on the classification maps of soil salinization types in Yinbei region in 1989,1999,2009 and 2019,the spatial statistical analy⁃sis method was used to analyze the evolution characteristics of soil salinization in the study area.The results showed that,from the per⁃spective of time change,the salinized cultivated land in Yinbei region showed an increasing trend from 1989 to 2019,with a large in⁃crease form 1989 to 2009 and a small increase from 2009 to 2019;From the perspective of spatial evolution,the degree of salinization gradually transits from centralized distribution to fragmented distribution;From the perspective of transfer matrix,the transformation of soil salinization types in Yinbei region from 1989 to 2019 was relatively large for the complexity,the transfer area between non sali⁃nized cultivated land and light to moderate salinized cultivated land was large.

关 键 词：盐渍化 时空变化 遥感 银北灌区 

分 类 号：S159[农业科学—土壤学]