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首页> 外文期刊>Tropical Animal Health and Production >Assessment of growth performance, immune responses, serum metabolites, and prevalence of leg weakness in broiler chicks submitted to early-age water restriction
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Assessment of growth performance, immune responses, serum metabolites, and prevalence of leg weakness in broiler chicks submitted to early-age water restriction

机译：评估接受早期限水的肉鸡的生长性能，免疫反应，血清代谢产物和腿无力患病率

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摘要

The objective of this study was to evaluate the effects of two methods of early-age water restriction on performance, some immune responses, serum metabolites, and prevalence of leg weakness in broiler chicks. One-hundred-eighty-seven-day-old chicks (Ross 308) were allocated to three treatments with four replicates based on a completely randomized design. Treatments included the control group, where birds had free access to water, and water-restricted groups, where access to water was limited to three 2-h periods (WRT1) or a 12-h period (WRT2) per day from days 7 to 17. Chicks in the control group were significantly heavier (P < 0.05) at 17 and 46 days of age compared to the restricted birds. In the WRT2 group, feed intake decreased significantly over the 17- to 28-day period while feed conversion ratio was poorer during water restriction (P < 0.05). Antibody titers against Newcastle and SRBC were higher (P < 0.05) for chicks with ad libitum access to water. Birds in the restricted groups exhibited a higher heterophil to lymphocyte ratio compared to the control group (P < 0.05). The treatments had no significant impact on serum metabolites including protein, triglyceride, total cholesterol, high-density lipoprotein and low-density lipoprotein cholesterols, calcium, and phosphorus concentrations. Walking ability, tibial dyschondroplasia, foot pad, hock burn, and valgus/varus angulation were not significantly influenced by water restriction. In conclusion, the current results indicate that early-age water restriction negatively influenced productive traits and immunological responses of broiler chicks and failed to have any favorable impacts on leg health.
机译：这项研究的目的是评估两种早期限水方法对肉仔鸡生产性能，一些免疫反应，血清代谢产物和下肢无力患病率的影响。根据完全随机的设计，将一百八十七天大的小鸡（罗斯308）分配给三种处理，一式四份。治疗方法包括对照组（鸟可以自由饮水）和限水组（每天从第7天到第3天每天限制饮水3个2小时时段（WRT1）或12小时时段（WRT2））。 17.对照组的小鸡在17和46天龄时比受限制的鸡明显重（P <0.05）。在WRT2组，在禁水期间17至28天的采食量显着下降，而饲料转化率则较差（P <0.05）。自由饮水的雏鸡对纽卡斯尔和SRBC的抗体效价更高（P <0.05）。与对照组相比，限制组的鸟类表现出更高的异嗜性与淋巴细胞比率（P <0.05）。这些处理对血清代谢产物（包括蛋白质，甘油三酸酯，总胆固醇，高密度脂蛋白和低密度脂蛋白胆固醇，钙和磷浓度）无明显影响。步行能力，胫骨软骨发育不良，足垫，飞节烧伤以及外翻/内翻角度均不受水分限制的显着影响。总之，当前的结果表明，早期限水对肉仔鸡的生产性状和免疫反应有负面影响，并且对腿部健康没有任何有利影响。

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