摘要
文章旨在探讨不同有机钙水平日粮对产蛋后期蛋鸡生产性能、蛋品质及骨钙含量的影响。试验将65周龄、产蛋率一致的608只海兰褐壳蛋鸡随机分为4组,每组4个重复,每个重复38只。4组蛋鸡在为期8周的饲养试验期间以柠檬酸钙的形式饲喂钙水平为2.0%、2.5%、3.0%和3.5%的日粮。结果:与2%钙组相比,3.0%钙组蛋鸡的产蛋率显著提高4.51%(P<0.05),破蛋率显著降低12.66%(P<0.05)。3%钙组蛋鸡料蛋比较3.5%钙组显著降低3.65%(P<0.05)。3.0%和3.5%钙组鸡蛋蛋黄颜色、蛋壳强度及储存7 d后哈夫单位显著高于2.0%钙组(P<0.05),而2.0%钙组蛋壳厚度表现最低(P<0.05)。3.0%和3.5%钙组胫骨强度较2.0%钙组分别显著提高7.03%和6.21%(P<0.05),同时胫骨钙含量分别显著提高3.90%和4.30%(P<0.05)。结论:在本试验条件下,产蛋后期蛋鸡日粮以柠檬酸钙的形式添加3.0%钙时可改善产蛋率和饲料效率,提高蛋壳厚度和蛋壳强度,进而降低破蛋率。
This experiment was conducted to investigate the effects of different calcium levels on performance,egg quality and bone calcium content of laying hens during late laying period.A total of 608 Hy-Line brown laying hens aged 65 weeks with the same laying rate were randomly divided into 4 groups with 4 replicates per group and 38 laying hens per replicate.Laying hens in the four groups were fed diets with calcium levels of 2.0%,2.5%,3.0%and 3.5%,respectively,during the 8-week feeding experiment.Results:Compared with 3%Ca group,laying rate of laying hens in 3.0%Ca group was significantly increased by 4.51%(P<0.05),and egg breaking rate was significantly decreased by 12.66%(P<0.05).Compared with 3.5%Ca group,feed eggs of laying hens in 3%Ca group were significantly decreased by 3.65%(P<0.05).Yolk color,eggshell strength and Haugh unit after 7 days of storage in 3.0%and 3.5%Ca groups were significantly higher than those in 2.0%Ca group(P<0.05),while eggshell thickness in 2.0%Ca group had the lowest performance(P<0.05).Compared with 2.0%Ca group,the tibia strength in 3.0%and 3.5%Ca groups was significantly increased by 7.03%and 6.21%(P<0.05),respectively,and the tibia calcium content was significantly increased by 3.90%and 4.30%(P<0.05),respectively.In conclusions:Under experimental conditions,dietary calcium level of 3.0%(calcium citrate)can improve laying rate and feed efficiency,increase eggshell thickness and eggshell strength,and reduce egg breaking rate of laying hens.
作者
马艳华
MA Yanhua(Puyang Vocational and Technical College,Puyang,Henan Province 457000,China)
出处
《中国饲料》
北大核心
2022年第8期62-65,共4页
China Feed
关键词
钙
蛋鸡
生产性能
蛋品质
骨钙
calcium
laying hens
production performance
egg quality
bone calcium
