树鼩（Tupaia Belangei chinesis）尿中电解质（Na~＋．K~＋．Ca^（2＋））的排泄节律

THE EXCRETE RHYTHM OF URIC ELECTROLYTE IN TREE SHREW

用ＳＰ１９００型原子吸收分光光度计测定了树２４－７２小时尿液中Ｎａ＋、Ｋ＋、ｃａ￣２＋的排泄量。经用余弦节律分析法及零振幅检验对实验数据进行处理，结果显示，树尿中Ｎａ＋、ｋ＋、Ｃａ￣２＋的排泄均有明显的昼夜节律。其峰值均出现于１２：００－２０：００，谷值出现于６：００－８：００．且其排泄量在午后至黄昏期间均处于较高水平（高于２４小时平均值）．黑夜至午前处于较低水平（低于２４小时平均值）。

Na+,K+,Ca￣2+,excrete amount of 24-72 hours in urine were determinedby Sp-1900 AAS.Parameters were analysed with "consinor-rhythmometry", and ,"Zero-amplitude test"。The results showed that there were obvious circadian rhythms about the exerete of uricNa+,K+,Ca￣2+ in tree shrews. The acromctron was at 12:00-20:00 and bathymetron was at6:00-8:00. The excrete amount was at higher level (higher than average amount of 24hours.) from noon to dusk and at lower level(lower than average amount of 24 hours) be-fore noon.