摘要
选用1日龄艾维茵肉仔鸡448只，随机分为8组，每组4个重复，每重复14只（公母各半）。采用4×2（Cu×VA）完全随机试验设计，研究了日粮添加不同水平的Cu（0，8，150，225mg／kg）和维生素A（1500，5000IU／kg），对肉仔鸡不同生长阶段（0～4周龄和5～7周龄）的生产性能及理化指标的影响。结果表明：铜的适宜添加量，前期为8mg／kg，后期为O～8mg／kg；全期高铜抑制了肉仔鸡生产性能、免疫功能、CuZn—SOD活性及胰岛素浓度；维生素A（5000IU／kg）组获得较好的生产性能、免疫功能及CuZn-SOD活性，并显著（P〈0．05）抑制了血清胰岛素浓度；Cu与维生素A互作效应对前期体增重及全期料重比影响均显著（P〈0．05），对后期淋巴细胞ANAE^＋％、全期血清CuZn—SOD活性及前期血清胰岛素浓度影响均极显著（P〈0．01），且二者间存在互补作用。
A 4× 2（Cu×VA） experiment with repeats was designed to investigate the influence of various dietary Cu and vitamin A levels on performance, immunology function, serum CuZn-SOD activity and insulin concentration in broilers. Broilers were randomly allotted to eight groups, each of which was replicated four times with four teen broilers per replicate. 14 for each treatment. Results showed that the Cu requirement was different in different stages. From 0 to 4 weeks, dietary Cu supplemental level was 8 mg/kg diet , and from 5 to 7weeks was 0-8 mg/kg diet. Dietary high copper levels（150 and 225 mg/kg diet） suppressed performance , immune function , CuZn-SOD activation and insulin concentration significantly through the whole period. When vitamin A supplemental level was 5000 IU/kg diet, better performance and other indexes was obtained through the whole period, but high vitamin A significantly（P〈0.05） suppressed serum insulin concentration . Cu-VA interaction significantly（P〈0.05） affected body weight gain at the end of week 4, feed ： gain ratio through the whole stage,ANAE^＋ % of lymphocyte at the end of week 7 , serum CuZn-SOD and insulin concentration at the end of week 4（P〈0.01）.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2006年第9期940-945,共6页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
山西省自然科学基金资助项目(20031072)
