Latour M A, Peebles E D, Boyle C R, Brake J D
Poultry Science Department, Mississippi State University, Mississippi 39762.
Poult Sci. 1994 Sep;73(9):1362-9. doi: 10.3382/ps.0731362.
In two experiments broiler chicks were fed nonisocaloric diets with either 0, 3, or 7% added lard. Megacaloric percentages of all major nutrients were the same in all diets. In Experiment 1 (broiler chicks 0 to 5 d of age), added dietary lard did not affect body, heart, spleen, or pancreas weight. Liver weight was suppressed by the inclusion of lard in the diet, yet liver composition changed, becoming higher in protein and lower in fat. Yolk sac weight decreased during the first 5 d posthatch, with the decrease being most pronounced by 3 d of age. There were no differences in feed consumption due to treatment in Experiment 1. In Experiment 2 (broiler chicks 6 to 11 d of age), added dietary fat resulted in differences in liver, body, and fecal excreta composition. Chicks given 7% added lard had lower liver fat throughout the trial than chicks fed no added lard. Additionally, these chicks had a higher body protein content at 6 and 7 d of age. However, body fat only increased in chicks fed 7% added lard by 11 d of age. Furthermore, chicks receiving 7% added lard had elevated fecal fat at Day 6, but did not consume more feed than chicks receiving 0 or 3% added lard. Additionally, chicks fed lard had lower liver weights than those fed 0% added lard.
在两项实验中，给肉鸡雏鸡饲喂添加了0%、3%或7%猪油的非等热量日粮。所有日粮中所有主要营养素的兆卡百分比均相同。在实验1（0至5日龄的肉鸡雏鸡）中，日粮中添加猪油对雏鸡的体重、心脏、脾脏或胰腺重量没有影响。日粮中添加猪油会抑制肝脏重量，但肝脏成分发生了变化，蛋白质含量升高，脂肪含量降低。孵化后前5天卵黄囊重量下降，到3日龄时下降最为明显。在实验1中，不同处理组的采食量没有差异。在实验2（6至11日龄的肉鸡雏鸡）中，日粮中添加脂肪导致肝脏、身体和粪便排泄物成分出现差异。在整个试验期间，添加7%猪油的雏鸡肝脏脂肪含量低于未添加猪油的雏鸡。此外，这些雏鸡在6日龄和7日龄时身体蛋白质含量较高。然而，只有饲喂添加7%猪油的雏鸡在11日龄时体脂才增加。此外，在第6天，添加7%猪油的雏鸡粪便脂肪含量升高，但它们的采食量并不比添加0%或3%猪油的雏鸡多。此外，饲喂猪油的雏鸡肝脏重量低于饲喂0%猪油的雏鸡。
