Zangeneh Samira, Torki Mehran, Lotfollahian Houshang, Abdolmohammadi Alireza
Animal Science Department, College of Agriculture and Natural Resources, Razi University, Kermanshah, Iran.
Department of Nutrition, Animal Science Research Institution, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
J Anim Physiol Anim Nutr (Berl). 2018 Dec;102(6):1521-1532. doi: 10.1111/jpn.12935. Epub 2018 Sep 25.
The effects of dietary supplemental lysophospholipids (LPLs) and vitamin C (VC) on performance, activity of antioxidant enzymes, and thyroid hormones of broiler chickens reared under thermoneutral and high ambient temperatures were evaluated. A total of 1,680 broiler chicks (Cobb 500) in finishing rearing period (days 21-38 of age) were allotted to two groups: thermoneutral (TN) and heat stress (HS). In the TN group, 480 chicks were subjected to four treatments with four replicates (n = 30) and maintained in usual ambient temperature (24 ± 1°C). In HS group, the remaining 1,200 chicks were subjected to four treatments with 10 replicates (n = 30) and exposed to high ambient temperature (34 ± 1°C for 8 hr daily). In both groups, four iso-caloric and iso-nitrogenous experimental diets based on a 2 × 2 factorial arrangements including supplemental LPLs (0 or 1,000 mg/kg) and VC (0 or 500 mg/kg) were formulated and used. Supplemental LPLs decreased (p < 0.05) body weight gain and increased FCR in the TN and HS groups. In the TN group, increased (p < 0.05) serum glucose was observed in chickens fed with dietary supplemental VC. In the HS group, decreased (p < 0.05) total protein concentration was detected in birds fed with supplemental LPLs. In both TN and HS groups, decreased (p < 0.05) uric acid concentration was detected in chicks fed with the VC-supplemented diets. A significant (p < 0.05) interaction between LPLs and VC on lactate concentration in the TN group was observed. In the HS group, decreased breast malondialdehyde concentration was detected in birds fed with the VC-supplemented diet. In the TN group, increased serum total antioxidant status was detected in birds fed with the LPLs-supplemented diet. In conclusion, LPLs improved oxidative stability and increased the antioxidant capacity of the serum. In addition, vitamin C modified heat stress and reduced lipid peroxidation.
评估了日粮中添加溶血磷脂（LPLs）和维生素C（VC）对在热中性和高环境温度下饲养的肉鸡生产性能、抗氧化酶活性及甲状腺激素的影响。总共1680只处于育肥期（21至38日龄）的科宝500肉鸡雏鸡被分为两组：热中性组（TN）和热应激组（HS）。在TN组中，480只雏鸡接受四种处理，每个处理四个重复（n = 30），并饲养在正常环境温度（24±1°C）下。在HS组中，其余1200只雏鸡接受四种处理，每个处理十个重复（n = 30），并暴露于高环境温度（34±1°C，每天8小时）下。在两组中，基于2×2析因设计配制并使用了四种等热量、等氮的实验日粮，包括添加LPLs（0或1000 mg/kg）和VC（0或500 mg/kg）。添加LPLs降低了（p < 0.05）TN组和HS组的体重增加，并提高了饲料转化率。在TN组中，日粮添加VC的鸡血清葡萄糖升高（p < 0.05）。在HS组中，添加LPLs的鸡总蛋白浓度降低（p < 0.05）。在TN组和HS组中，添加VC日粮的雏鸡尿酸浓度均降低（p < 0.05）。在TN组中观察到LPLs和VC对乳酸浓度有显著（p < 0.05）的交互作用。在HS组中，添加VC日粮的鸡胸肉丙二醛浓度降低。在TN组中，添加LPLs日粮的鸡血清总抗氧化状态升高。总之，LPLs改善了氧化稳定性并提高了血清抗氧化能力。此外，维生素C减轻了热应激并降低了脂质过氧化。
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