Attia Y A, Burke W H, Yamani K A, Jensen L S
Animal Production Research Institute, Dokki, Giza, Egypt.
Poult Sci. 1995 Feb;74(2):247-60. doi: 10.3382/ps.0740247.
The effects of daily energy intake on reproductive performance of Arbor Acres males and on growth of their offspring was studied. In Experiment 1, 21 males were placed in individual pens with 12 females. Three rations, differing in energy, were fed from 24 to 57 wk of age with seven males receiving either 300, 340, or 380 kcal ME/d. In Experiment 2, 32 individually caged males were given daily allotments of 280, 320, 360, or 360 kcal ME/d from 26 to 32 wk of age and 300, 340, 380, or 380 kcal ME/d from 32 to 38 wk. Rations of the two groups of males fed the highest energy level differed in formulation, one being the same wheat short-based basal ration as fed to the two lower energy groups, only with additional fat, and the other being a corn-soybean-based ration. Body weight and testes weight were increased with increased energy allotment in both experiments but carcass composition was unaltered. There were no significant effects of energy intake on fertility or hatchability in either experiment. Even though mean differences were not significant, fertility in two pens dropped to near zero at 38 wk in Experiment 1. Semen characteristics and plasma testosterone concentrations were unaffected by energy intake in Experiment 2. There was a significant linear increase in 6-wk BW of broilers associated with the increase in sire energy intake in each of three batches of broilers grown in Experiment 1 and in one of two batches of broilers grown in Experiment 2.
研究了每日能量摄入量对艾拔益加雄性肉鸡繁殖性能及其后代生长的影响。在实验1中，将21只雄性肉鸡单独饲养在配有12只雌性肉鸡的栏舍中。从24至57周龄期间饲喂三种能量不同的日粮，七只雄性肉鸡分别摄入300、340或380千卡代谢能/天。在实验2中，32只单笼饲养的雄性肉鸡在26至32周龄期间每日分别给予280、320、360或360千卡代谢能/天的日粮，在32至38周龄期间分别给予300、340、380或380千卡代谢能/天的日粮。两组饲喂最高能量水平的雄性肉鸡的日粮配方不同，一组与饲喂较低能量水平的两组相同，是以小麦次粉为基础的基础日粮，只是添加了脂肪，另一组是以玉米-大豆为基础的日粮。在两个实验中，体重和睾丸重量均随能量分配的增加而增加，但胴体组成未发生改变。在两个实验中，能量摄入量对受精率或孵化率均无显著影响。尽管平均差异不显著，但在实验1中，38周龄时两个栏舍的受精率降至接近零。在实验2中，精液特征和血浆睾酮浓度不受能量摄入量的影响。在实验1中饲养的三批肉鸡以及实验2中饲养的两批肉鸡中的一批中，父本能量摄入量的增加与6周龄肉鸡体重的显著线性增加相关。
