小鼠天然组分日粮补锌对生长、繁殖及组织锌含量影响的研究

Study on Infuluence of Supplement Zinc in Natural In gredient Diets on Growth, Reproduction and Tissue Zinc in Mice

取２０日龄雄性昆明小鼠１５０只，随机分为５组。取性成熟雌雄昆明小鼠１５０对，也随机分为５组。各组分别喂含Ｚｎ５０ｍｇ／ｋｇ的基础日粮和含Ｚｎ６０、７０、８０、９０ｍｇ／ｋｇ的添加Ｚｎ日粮。生长试验３０ｄ，繁殖试验观察２个胎次。结果表明，日粮Ｚｎ水平对实验小鼠体增重、饲料效率、繁殖力（初生窝仔数、初生窝重、离乳窝仔数、离乳窝重）无显著差异（Ｐ＞００５）。血清、肝脏、胰脏、肾脏、胫骨含Ｚｎ量及血清碱性磷酸酶活性各处理间也无显著差异（Ｐ＞００５）。说明以常规组分配合的天然组分日粮含Ｚｎ量不仅能满足实验小鼠生长和繁殖对Ｚｎ的需要，而且组织Ｚｎ也已达到饱和状态。

150 male Kunming mice at age of 20 days were divided into 5 groups and 150 coupl es Kunming mice in sexul maturity were also divided into 5 groups randomly. The mice in different groups were fed control diet and experimental diets contain di fferent Zine level of 60,70,80 and 90 mg/kg respectively. The results showed that the zinc level in diets have no significant infuluence on weight gain, fee d efficiency and reproductive performance of mice in different groups. There wer e also no significant difference in zinc content in serum, liver, pancreas, kidd ey, tibia and serum AKP in different groups. The results demonstrated that the z inc level in natural ingredient diets can not only satisfy the mice requirement for growth and reproduction, but also make tissue zinc to reach saturation. It i s unnecessary to supplement zinc additive to mice diets.