摘要： 将240只66周龄罗曼蛋鸡(平均2.46kg)随机分成4组,每组3个重复,每重复20只。对照组饲喂基础日粮,试验组日粮在基础日粮基础上分别添加0.5%,1.0%和1.5%丙酸锌,以研究丙酸锌对蛋鸡换羽和产蛋性能及鸡蛋品质的影响。结果表明:0.5%,1.0%和1.5%丙酸锌组,蛋鸡的采食量、体重、腹脂重、卵巢重和黄色卵胞数量显著降低(P<0.05);1.0%和1.5%丙酸锌组输卵管重量显著降低(P<0.05)。丙酸锌的3个处理组蛋鸡血清LH、FSH和E2含量均显著降低(P<0.05);1.0%和1.5%的丙酸锌处理组蛋鸡产蛋率显著升高(P<0.05),蛋壳相对重、蛋壳厚度均比对照组显著增加(P<0.05);蛋重、蛋比重、蛋黄指数、蛋形指数、哈夫单位和蛋白高度差差异均不显著(P>0.05)。结论:丙酸锌能够引起蛋鸡换羽,提高蛋壳质量。

关键词: 蛋鸡, 丙酸锌, 换羽, 鸡蛋品质

Abstract: The study was conducted the effects of high zinc diets using zinc propionate on molt induction, postmoltlaying performance and egg quality in 66-wk-old hens.A total of 240 Lohmann( 2.46 kg) were randomly allocated to fourtreatments, 3 repeats every treatment, 20 hens every repeat. The birds were fed basal diets supplement with 0, 0.5%,1.0% and 1.5% zinc propionate, respectively. The results as follows: Feed intake, body weight, abdominal fat weight, ovaryweight and the number of yellow follicles were significant ly decreased( P< 0.05) in 0.5% , 100 % and 1.5% zincpropionate hens. Oviduct weight was also decreased( P< 0.05) in birds fed 1.0% and 1.5% zinc propionate diets.Serum LH, FSH and E2 concentrat ion were decreased( P< 0.05) in birds fed zinc propionate. Laying rate, relat ive eggshellweight , eggshell thickness were significantly increased( P< 0.05) after molting. It had no difference( P> 0.05) on eggweight, specific gravity, egg shape index, yolk index,Haugh score and albumen height. Conclusion: High zinc diets usingzinc propionate may induce to molt and improve the eggshell quality in hens.

Key words: Laying hens, Zinc propionate, Molt , Egg quality

中图分类号: 

• S831