Probiotics in drinking water alleviate stress of induced molting in feed-deprived laying hens
Probiotics in drinking water alleviate stress of induced molting in feed-deprived laying hens
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DOI：
10.5713/ajas.2008.70754
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发表时间：
2008-08-01
期刊：
影响因子：
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通讯作者：
Qujeq, D.
中科院分区：
文献类型：
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作者：
Khajali, F.;Karimi, S.;Qujeq, D.
本试验旨在研究在饮水中添加益生菌对诱导换羽期去料蛋鸡的生理变化的影响。蜕皮后的性能和蛋的质量标准进行了研究。将90只78周龄海兰W36蛋鸡按等体重分为2个处理组，通过连续去除饲料直至体重减少30%左右进行诱导换羽。试验历时12周，包括4周的换羽期和8周的换羽后阶段。治疗I未接受益生菌，并被视为对照。处理2与对照组相似，不同之处在于母鸡在饲料剥夺期间在饮用水中接受400 mg/L的益生菌。结果表明，两组中的母鸡在第5天停止生产。然而，接受益生菌的母鸡比对照组更快地达到5%和50%的产蛋量（30和52天vs. 31和54天）。在蜕皮期间饥饿增加异嗜细胞与淋巴细胞（H/L）的比率，红细胞压积和血浆T4和Na+水平，而血浆T3和Cl-水平下降。益生菌对蜕皮期间的体重减少没有显著影响。先前接受益生菌的母鸡的蜕皮后产蛋量和蛋质量较高，但这些反应并不显著。然而，饲料转化率显着更好的母鸡接受益生菌。红细胞压积、血浆甲状腺补充益生菌。然而，H/L比在接受益生菌的禽类中显示出显著（p < 0.05）降低，表明该产品对饲料缺乏的产蛋鸡的有益效果。蜕皮后的鸡蛋质量标准没有显着差异。
An experiment was conducted to evaluate the physiological changes of laying hens subjected to feed removal during induced molting while received probiotics in the drinking water. Post-molt performance and egg quality criteria were also studied. Ninety 78-week-old Hy-line W36 laying hens were divided into two treatment groups according to equal body weight and subjected to induced molting by continuous feed removal until around 30% BW reduction. The experiment lasted 12 wks consisting of 4-wk molting and 8-wk post-molt periods. Treatment I received no probiotics and was considered as the control. Treatment 2 was similar to the control except that hens received probiotics in the drinking water at 400 mg/L during feed deprivation. The results indicated that hens in both groups went out of production by Day 5. However, hens received probiotics reached 5 and 50% egg production sooner than the control (30 and 52 days vs. 31 and 54 days). Starvation during molting increased heterophil to lymphocyte (H/L) ratio, hematocrit and plasma T4 and Na+ levels while plasma T3 and Cl- levels were decreased. Probiotics had no significant impact on BW reduction during molt. Post-molt egg production and egg mass were higher in hens which previously received probiotics, but these responses were not significant. However, feed conversion ratio was significantly better in hens which received probiotics. Hematocrit, plasma thyroid supplementation of probiotics. However, H/L ratio showed a significant (p < 0.05) reduction in birds which received probiotics suggesting beneficial effects of this product for feed-deprived laying hens. No significant difference was observed in post-molt egg quality criteria.