关键词: 遥感解译, 盐碱地, 地形地貌, 面积比例

Abstract: In order to explore the relationship between salinization degree and longitude, latitude and altitude in spatial distribution of salinealkali land in northern Xinjiang, based on soil survey results in 1985, combined with the results removing artificial oasis by Landest 8 remote sensing interpretation in 2015, taken the ratio of the area of salinealkali land to total area as an indicator of the degree of salinization in the test area, the distribution of salinealkali land in the area was analyzed by using 2 km × 2 km grid unit. The results showed that the degree of salinization in northern Xinjiang was obviously affected by topography and precipitation, especially by soil types. The degree of salinization in northern Xinjiang region increased from west to east (P=0838), mainly concentrated in the range of E90°～E96°, and salinealkaline soil accounted for 7562% to the total area. It tended to decrease from south to north (P=-0768), mainly concentrated in the range of N40°～N43°. The proportion of salinealkali soil area in the total area is 7782%. From low to high along the altitude, the trend was decreasing (P=-0774), mainly concentrated in the range of -160～500 m, and the ratio of salinealkaline soil to total area was 4741%. Analysis of the spatial distribution characteristics of salinealkali land in northern Xinjiang was of great significance for revealing the variation law of salinization degree in northern Xinjiang, promoting the rational development of salinealkaline soil resources in northern Xinjiang and maintaining regional ecological security.

Key words: remote sensing interpretation, salinealkali land, topography, area ratio