Zubair A K, Leeson S
Department of Animal and Poultry Science, University of Guelph, Ontario, Canada.
Poult Sci. 1994 Jan;73(1):129-36. doi: 10.3382/ps.0730129.
An experiment was conducted to determine growth and carcass characteristics of male broilers subjected to varying periods of early nutrient restriction. Nutrient restriction was achieved by feeding a starter diet in which the major ingredients were replaced with 50% oat hulls. Five treatments involved feeding this diluted diet for 6 d, either continuous or split into shorter periods in different ways, all starting at 6 d of age. On completion of the 6 d of nutrient restriction, all birds received undiluted starter diet, followed by grower and finisher diets to trial termination at 49 d. All birds fed the diluted diet exhibited reduced nutrient intake. Complete growth compensation by all birds that previously received the diluted diet was attained by 35 d, due largely to their superior (P < .05) feed efficiencies relative to the control birds during realimentation. Varying the period of nutrient restriction did not affect growth compensation. Birds that received the diluted diet for 6 continuous d tended to be leaner at 42 d compared with those that consumed the diluted diet for shorter periods. This latter effect may relate to variable ME intake. There was no statistical difference in other carcass characteristics measured at both 42 and 49 d of age.
进行了一项实验，以确定早期营养限制不同时长对雄性肉鸡生长和胴体特征的影响。通过饲喂一种起始日粮来实现营养限制，该日粮的主要成分被50%的燕麦壳替代。五种处理方式包括连续6天饲喂这种稀释日粮，或采用不同方式分成较短时间段饲喂，均从6日龄开始。在6天营养限制期结束后，所有鸡只均改喂未稀释的起始日粮，随后是生长鸡日粮和育肥鸡日粮，直至49日龄试验结束。所有饲喂稀释日粮的鸡只营养摄入量均减少。先前接受稀释日粮的所有鸡只在35日龄时实现了完全生长补偿，这主要是因为在再饲喂期间它们相对于对照鸡只具有更高（P < .05）的饲料效率。改变营养限制时长对生长补偿没有影响。连续6天接受稀释日粮的鸡只在42日龄时相比接受稀释日粮时间较短的鸡只往往更瘦。后一种效应可能与可消化能量摄入量的变化有关。在42日龄和49日龄时测量的其他胴体特征方面没有统计学差异。
