Sobotik Eric B, Lee Jason T, Hagerman Scott, Archer Gregory S
Department of Poultry Science, Texas A&M University-College Station, TX 77843, USA.
Chemi Nutra, LLC-Austin, TX 78758, USA.
Animals (Basel). 2018 Jun 5;8(6):87. doi: 10.3390/ani8060087.
The use of feed additives to improve feed conversion while increasing growth is the goal of any broiler nutrition program. Therefore, it is important to evaluate potential feed additives not only for increased performance, but also for any negative attributes. A study was conducted to evaluate the effects of feeding phosphatidic acid (PA) to broiler chickens. Two experiments were conducted using exercise in conjunction with PA (Experiment 1(E1)) and administering PA at different inclusion rates in the diet (Experiment 2 (E2)); LowPA (5 mg/bird/day), MidPA (10 mg/bird/day), HighPA (15 mg/bird/day), and control (CON). All birds were weighed bi-weekly during the experiments to obtain average pen weights and feed conversion ratios (FCRs). At the end of the experiments, eight birds per pen were processed to evaluate carcass traits and breast yield. In E1, exercise did not affect growth, feed conversion or processing traits ( > 0.05). However, PA supplementation did increase growth, carcass and breast weight, and carcass and breast yields ( < 0.05). In E2, differences ( < 0.05) in live bird weights between the control birds (1.65 kg) and all PA treatments (pooled mean: 1.73 kg) began at 28 days; however, only the LowPA carried that effect ( = 0.05) through to the conclusion of the trial (3.55 vs. 3.81 kg). Overall, LowPA (1.64) and MidPA (1.69) had lower ( < 0.05) FCRs than the CON treatment (1.74). Increased growth observed in live bird weights in the LowPA translated to increased ( < 0.05) overall carcass weights (2.78 vs. 2.99 kg) and specifically breast filet weights (0.69 vs. 0.76 kg). Yields did not differ ( > 0.05), but with the increased weight feeding LowPA resulted in more total breast meat. Phosphatidic acid did not affect ( > 0.05) woody breast or white striping. In conclusion, dietary PA improved FCR, increased live bird weights, and increased breast fillet weight without increased incidence of white striping. These results indicate that feeding PA may increase production efficiency in broilers.
使用饲料添加剂来提高饲料转化率并促进生长是任何肉鸡营养计划的目标。因此，评估潜在的饲料添加剂不仅要考虑其对生长性能的提升，还要关注其是否存在任何负面特性。开展了一项研究来评估给肉鸡饲喂磷脂酸（PA）的效果。进行了两项实验，一项是将运动与PA结合使用（实验1（E1）），另一项是在日粮中添加不同比例的PA（实验2（E2））；低剂量PA组（5毫克/只/天）、中剂量PA组（10毫克/只/天）、高剂量PA组（15毫克/只/天）以及对照组（CON）。在实验期间，每两周对所有鸡称重一次，以获得每栏的平均体重和饲料转化率（FCR）。实验结束时，每栏选取8只鸡进行处理，以评估胴体性状和胸肉产量。在E1中，运动对生长、饲料转化率或加工性状没有影响（P＞0.05）。然而，添加PA确实提高了生长速度、胴体和胸肉重量以及胴体和胸肉产量（P＜0.05）。在E2中，对照组鸡（1.65千克）与所有PA处理组（合并平均值：1.73千克）之间的活禽体重差异（P＜0.05）在第28天开始显现；然而，只有低剂量PA组（P = 0.05）将这种影响持续到试验结束（3.55千克对3.81千克）。总体而言，低剂量PA组（1.64）和中剂量PA组（1.69）的FCR低于对照组（1.74）（P＜0.05）。低剂量PA组活禽体重的增长转化为总体胴体重量的增加（2.78千克对2.99千克），特别是胸肉重量的增加（0.69千克对0.76千克）（P＜0.05）。产量没有差异（P＞0.05），但由于体重增加，低剂量PA组的胸肉总量更多。磷脂酸对木质化胸肉或白条现象没有影响（P＞0.05）。总之，日粮中添加PA可改善FCR，增加活禽体重，并增加胸肉重量，同时不会增加白条现象的发生率。这些结果表明，饲喂PA可能会提高肉鸡的生产效率。
