鹅生长过程中血清生长抑素水平变化的研究

STUDY ON CHANGES OF SOMATOSTATIN LEVELS IN THE GROWING WHITE GOOSE

本文研究了四季鹅在生长过程中,外周血液生长抑素(Somatostatin,SS)水平的变化,同时观察了甲状腺激素T_3、T_4和血清脲氮(BUN)水平以及与其增重型的关系。同日孵出的四季鹅分批于2、16、30、44、58、72日龄时称重、采血,用放射免疫法测定血清SS、T_3、T_4水平。结果表明,鹅孵出后,相对增重越高、SS水平则越低,SS与生长速度之间存在着显著负相关(r=-0.82,P<0.05),与T_3变化呈强负相关(r=-0.73,P<0.05),与BUN呈正相关(r=0.91,P<0.01)。提示在鹅生长过程中,SS水平降低时,T_3水平升高,组织中氮沉积增加,使增重速度加快。

The changes of blood somatostatin (SS) and blood urea nitrogen (BUN) levels, as well as the relationship between triiodothyronine (T3), thyroxine (T4) and gains were observed in the growing white goose at different days of age. The blood samples were collected through heart at 2, 16, 30, 44, 58, 72 days of age after the birds weighed. The results showed that the levels of SS were changed with relative body weight gain. There were significant negative correlation between the levels of SS and growth rate (r =-0.82, P<0.05), strong negative relationship between the levels of SS and BUN (r=-0.91, P<0.01), The results suggest that when the level of SS decreased, the level of T3 increased and concentrations of BUN dec lined which revealed increase of nitrogen retention in the tissue, thereby the growth of the birds was promoted.