Oju E M, Waibel P E, Noll S L
Department of Animal Science, University of Minnesota, St. Paul 55108.
Poult Sci. 1988 Dec;67(12):1750-9. doi: 10.3382/ps.0671750.
Male and female Large White Nicholas turkeys were fed corn and soybean meal diets for 24 and 20 wk, respectively. Control and low protein (75% of control in protein and 66% of control in lysine and methionine) diets were fed during 0 to 6 wk of age. Thereafter, both groups received the control diet. Body composition of turkeys was determined at 0, 2, 4, 6, 8, 12, 16, 20, and 24 (males), and at 0, 2, 4, 6, 8, 11, 14, 17, and 20 (females) wk of age. Compared with controls, undernourished turkeys had depressed body weight gain, lower feed intake, poorer feed efficiency, reduced carcass protein, increased carcass fat, and better efficiency of protein retention at 6 wk of age. During realimentation (after 6 wk of age), undernourished turkeys increased average daily feed consumption to that of controls and showed increased weight gains. By 24 and 20 wk of age, weights of undernourished male and female turkeys were no longer different from the weights of their respective controls. Feed efficiency of undernourished turkeys was better than that of controls during realimentation. Differences in body composition of undernourished and control turkeys were no longer evident after realimentation.
雄性和雌性大白尼古拉斯火鸡分别采食玉米和豆粕日粮24周和20周。0至6周龄期间分别饲喂对照日粮和低蛋白日粮（蛋白质含量为对照的75%，赖氨酸和蛋氨酸含量为对照的66%）。此后，两组均采食对照日粮。在0、2、4、6、8、12、16、20和24周龄（雄性）以及0、2、4、6、8、11、14、17和20周龄（雌性）时测定火鸡的体成分。与对照组相比，营养不足的火鸡在6周龄时体重增加受抑制、采食量降低、饲料效率较差、胴体蛋白质减少、胴体脂肪增加，但蛋白质保留效率更高。在恢复营养阶段（6周龄后），营养不足的火鸡平均日采食量增加到与对照组相同水平，体重增加。到24周龄和20周龄时，营养不足的雄性和雌性火鸡体重与各自对照组的体重不再有差异。在恢复营养阶段，营养不足的火鸡饲料效率优于对照组。恢复营养后，营养不足和对照火鸡的体成分差异不再明显。
