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首页> 外文期刊>Poultry Science >Effects of the free fatty acid content in yellow grease on performance, carcass characteristics, and serum lipids in broilers.
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Effects of the free fatty acid content in yellow grease on performance, carcass characteristics, and serum lipids in broilers.

机译：黄色油脂中的游离脂肪酸含量对肉鸡生产性能，car体特性和血脂的影响。

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This study was conducted to investigate whether the free fatty acid (FFA) content of yellow grease would influence the performance and carcass characteristics of broiler chicks. A total of 432 one-day-old, male Arbor Acres broilers were randomly allotted to 1 of 4 treatments, with each treatment being applied to 6 pens of 18 chicks. The dietary treatments were based on corn and soybean meal and were supplemented with either soybean oil (2.86% FFA) or yellow grease with a low (2.74%), medium (12.59%), or high (19.05%) FFA content. The fat sources were supplemented at 1.5% of the diet during the starter phase (0 to 21 d) and at 3.0% of the diet during the grower phase (22 to 42 d). From d 0 to 42, the BW gains of chicks fed diets containing soybean oil and yellow grease with 2.74% FFA were similar. As the FFA level in the yellow grease increased, the BW gain of chicks decreased (P < 0.01). The reduction in BW gain appeared to be mediated by a reduction in feed intake. The dressing percentage and the percentage of breast muscle in the carcass were significantly (P < 0.01) lower for broilers fed any yellow grease diet compared with birds fed soybean oil. In contrast, abdominal fat was significantly increased in diets containing yellow grease. These results demonstrate that the performance of birds fed yellow grease with a low content of FFA was essentially equal to that of birds fed soybean oil. However, because yellow grease samples containing FFA levels greater than 2.74% negatively affected bird performance, producers should exercise caution with regard to feeding broilers yellow grease with an elevated FFA content. In 42-d-old broilers, serum total cholesterol and low-density lipoprotein cholesterol levels were elevated in birds fed yellow grease, regardless of the dietary level. In contrast, serum high-density lipoprotein cholesterol and triglyceride levels were unaffected by dietary treatment. Although dietary FFA may influence triglyceride-rich lipoprotein metabolism in broilers, an explanation for the observed effects remains elusive.
机译：进行这项研究以调查黄色油脂中的游离脂肪酸（FFA）含量是否会影响肉鸡的生产性能和car体特性。总共432只1天大的雄性Arbor Acres肉鸡被随机分配给4种处理方法中的一种，每种处理方法都应用于18只小鸡的6只钢笔。饮食处理以玉米和豆粕为基础，并补充有低（2.74％），中（12.59％）或高（19.05％）FFA含量的大豆油（2.86％FFA）或黄色油脂。在启动阶段（0至21 d）以日粮的1.5％补充脂肪，在生长阶段（22至42 d）以日粮的3.0％补充脂肪。从第0天到第42天，饲喂含有大豆油和黄色油脂以及2.74％FFA的日粮的雏鸡的体重增加是相似的。随着黄色油脂中FFA含量的增加，雏鸡的体重增加降低（P <0.01）。体重增加的减少似乎是由采食量的减少引起的。与饲喂大豆油的禽类相比，饲喂任何黄色油脂饮食的肉鸡的敷料百分比和breast体中的胸肌百分比均显着降低（P <0.01）。相反，含黄色油脂的饮食中腹部脂肪明显增加。这些结果表明，饲喂低FFA含量的黄色油脂的禽类的性能与饲喂大豆油的禽类的性能基本相同。但是，由于FFA含量大于2.74％的黄色油脂样品会对鸡只性能产生负面影响，因此生产者应谨慎喂食FFA含量较高的肉鸡黄色油脂。在42日龄的肉鸡中，饲喂黄色油脂的家禽的血清总胆固醇和低密度脂蛋白胆固醇水平升高，而与饮食水平无关。相反，饮食治疗不会影响血清高密度脂蛋白胆固醇和甘油三酸酯水平。尽管日粮FFA可能会影响肉鸡中富含甘油三酸酯的脂蛋白代谢，但对所观察到的影响的解释仍然不清楚。

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