Cunningham D C, Morrison W D
Poult Sci. 1977 Nov;56(6):1783-91. doi: 10.3382/ps.0561783.
One hundred and twenty six commercial White Leghorn pullets were housed in cages at 23 weeks of age and fed two laying diets that in energy and fat content. Changes in hepatic "citrate-cleavage" and "malic" enzyme activity and changes in liver and body chemical composition were measured each week during the first 20 weeks of lay. Average daily caloric intake was greater for the birds fed the high energy laying diets even though these birds consumed 11% less feed. While energy content of the laying diet failed (P = 0.05) to affect body weight gains, liver weight, liver fat content and hepatic enzyme activity, significant (P = 0.05) increases in abdominal fat pad weight and total body fat content were noted. The findings of significant alterations in total carcass composition in birds receiving the high energy laying diet support the conclusion that energy content of the layer diet will influence the carcass composition of modern day egg producing strains.
126只商品来航蛋鸡在23周龄时被关入笼中，喂食两种能量和脂肪含量不同的产蛋日粮。在产蛋的前20周内，每周测量肝脏“柠檬酸裂解”酶和“苹果酸”酶活性的变化以及肝脏和身体化学成分的变化。尽管采食高能产蛋日粮的鸡只采食量减少了11%，但其平均每日热量摄入量更高。虽然产蛋日粮的能量含量对体重增加、肝脏重量、肝脏脂肪含量和肝脏酶活性没有影响（P = 0.05），但发现腹部脂肪垫重量和全身脂肪含量显著增加（P = 0.05）。采食高能产蛋日粮的鸡只胴体组成发生显著变化的结果支持这样的结论，即蛋鸡日粮的能量含量会影响现代蛋鸡品种的胴体组成。
