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收集了1954年到1982年山东莱州湾平原部分区域的6个年份的航片,具体研究了寿光县北部170平方公里内各种盐渍化土壤的变化规律。以航片的色调、图案和纹理为判读标志,按年份依次解译。结果表明,土壤盐化程度降低,面积有所缩小;盐土面积逐年减少,中度、重度盐化土壤面积有增加到减少的过程,轻度盐化土壤则由降低到增大的过程;盐土同其它土壤的分界线不断北移;盐渍化土壤图斑数量和面积交替消长。
The photos of six years from 1954 to 1982 in a part of the Laizhou Bay Plain were collected and the changes of various salinized soils in the north of Shouguang County were studied. With aerial color, pattern and texture as the interpretation of signs, according to the year interpreter. The results showed that the degree of soil salinization decreased and the area was reduced; the area of salinized soil decreased year by year; the area of moderate and severe salinized soil increased and decreased; the salinity of lightly salted soil decreased from reduced to increased; The boundaries of other soils continue to move northward; the number and area of salinized soils alternate.