摘要
以肉仔鸡为试验动物,采用玉米淀粉——蛋清粉型纯合饲粮,研究了在正常锌水平及低锌水平饲粮条件下,肉仔鸡各器官锌的含量及肉仔鸡对饲粮锌的利用。研究表明,低锌组肉仔鸡体增重、胫骨长度、胫骨灰分显著低于正常锌水平组,而且胫骨、肝脏、肾脏及胰脏锌浓度都显著低于正常锌水平组(P<0.01)。同时研究了血清碱性磷酸酶活性与全血锌、肝脏、肾脏、胰脏及胫骨锌含量的相关性。结果表明,肝脏、肾脏及胫骨锌含量与血清碱性磷酸酶活性呈较高的线性关系,相关系数分别为0.90,0.93和0.97,相关极显著(P<0.01)。采用 Nwokolo 等人的方法,研究了肉仔鸡对不同水平饲粮锌的真利用率。结果表明,缺锌组肉仔鸡对饲粮锌的利用率显著高于正常锌水平组(P<0.01)。通过上述几个方法比较,本文认为,评定肉仔鸡锌利用率和锌的生理指标,以采用血清碱性磷酸酶活性的测定为评定指标较为适合。
Experiments were designed to study the bioavailability of zinc in adequate and deficientsynthetic diets to broiler chicks.The results showed that the weight gain,tibia length,tibia ashof chicks deficient in Zn were less than those of chicks on a normal diet(P<0.01),and Znconcentrations in liver,tibia,kidney and pancreas significantly decreased(P<0.01).Correla-tion coefficients between serum alkaline phosphatase activity and Zn concentrations in liver,kidney and tibia were 0.90,0.93,0.97,respectively,i.e.highly significant(P<0.01).The re-sults also showed that Zn bioavailabilify was significantly higher in Zn deficient diet than thatin normal Zn diet(P<0.01).This study on zinc bioavailability indicated that serum alkalinephosphatase activity determination proved to be a more reliable method.
基金
国家自然科学基金
