【摘要】 在1996年夏季对岱海的综合调查基础上，结合自50年代以来关于岱海的地理学、水文学和水生生物学资料，对岱海水质咸化中的若干生态因子进行了比较分析，结果表明：目前岱海pH值为933，这已经接近生物适应范围的最上限；总碱度也逐年增长，而且增长极为明显；氯离子的含量也已经远远超过了1000mg/L的极限指标。上述变化清晰地说明，岱海的水质咸化过程正在加强。同时，钙镁比率越来越失调，水的硬度也不断增加，这些变化对渔业生产十分不利。更多还原

【Abstract】 Daihai Lake (112°33′31″—46′40″E，40°29′7″ —37′6″N) is a semi saline alkaline lake, which located in Inner Mongolia Pl ateau of China. Based on the results of the chemical and biological surveys of Daihai Lake in summer, 1996 and the survey of geography, hydrology and hydrobiology since 1950s, the author dealt with a comparative analysis on the changes of several relevant ecological factors from 1953 to 1996. Chloride ion, pH and total alkalinity of the lake were gradually increased during the study period, the concentration of chloride ion being 2306.1mg/L, pH 9.33 and total alkalinity 9.68meq /L in 1996, which approach to the upper limit for freshwater fish survival. According to above significant changes, the conclusion could be drawn that the process of salinization of Daihai Lake is getting strong. Also, in the study, the concentration changes of calcium and magnesium ion, ratio of calcium and magnesium, and total hardness was regarded.更多还原