Peebles F D, Cheaney J D, Brake J D, Boyle C R, Latour M A
Poultry Science Department, Mississippi State University, Mississippi 39762, USA.
Poult Sci. 1997 Jan;76(1):29-36. doi: 10.1093/ps/76.1.29.
The effects of dietary lard on serum glucose (GLU) and lipids were determined in Athens-Canadian randombred broiler chickens. Birds were provided either 0, 3, or 7% added lard in nonisocaloric starter diets through 10 d of age (S1), followed by either 3 or 7% added dietary lard through 21 d of age (S2). A common grower diet was fed to all birds after 21 d. Body and organ weights, feed conversion, and concentrations of various blood constituents, including serum GLU and lipids, were determined weekly from 14 to 42 d of age. Constant levels of added fat in both S1 and S2 diets generally led to higher BW in males at 42 d. Relative testes weight at 14 d was higher in males fed 3% than in those fed 7% S2 diets, whereas 7% added lard in S2 diets preceded by no added fat in S1 diets resulted in higher relative spleen weights in males at 42 d. Serum GLU concentrations were highest in males that received 3% lard rather than no added lard in the S1 diet. Serum low density lipoprotein cholesterol (LDLC) concentrations at 14 d were highest in females fed constant levels of lard at either 3 or 7% in both starter periods. It was concluded that added lard fed to randombred chickens at various times and levels in starter diets elicited responses in organ weight and serum LDLC and GLU concentrations that varied with the sex and age of the bird and were not consistently related to BW.
在雅典-加拿大随机繁殖的肉鸡中测定了日粮猪油对血清葡萄糖（GLU）和脂质的影响。在10日龄前（S1），给雏鸡提供非等热量开食日粮，添加0%、3%或7%的猪油，然后在21日龄前（S2），日粮添加3%或7%的猪油。21日龄后，所有鸡只饲喂普通育成日粮。在14至42日龄期间，每周测定鸡只的体重和器官重量、饲料转化率以及各种血液成分的浓度，包括血清GLU和脂质。S1和S2日粮中添加脂肪的恒定水平通常使42日龄雄性鸡的体重更高。14日龄时，饲喂3% S2日粮的雄性鸡的相对睾丸重量高于饲喂7% S2日粮的雄性鸡，而S1日粮不添加脂肪、S2日粮添加7%猪油的情况下，42日龄雄性鸡的相对脾脏重量更高。在S1日粮中，接受3%猪油而非不添加猪油的雄性鸡的血清GLU浓度最高。在两个开食期饲喂3%或7%恒定水平猪油的雌性鸡，14日龄时血清低密度脂蛋白胆固醇（LDLC）浓度最高。得出的结论是，在开食日粮的不同时间和水平给随机繁殖的鸡饲喂添加的猪油，会引起器官重量以及血清LDLC和GLU浓度的变化，这些变化因鸡的性别和年龄而异，且与体重没有一致的关系。
