摘要
An experiment was designed to contain eight feed consumption levels (ad libitum, 300, 330, 360, 390, 420, 450, 480 g/day/bird) to evaluate the effects of feed consumption levels on growth performance and apparent digestibility of nutrients for White Pekin ducks from 35 days to 42 days of age. Ninety-six 35-day-old male Pekin ducks were randomly assigned into eight treatments, each containing six replicate pens with two birds per pen. All birds of the treatment group 1 as the control group was fed ad libitum and the birds of the treatment groups from 2 to 8 were quantitatively fed by force-feeding. The feed intake was 300, 330, 360, 390, 420, 450, 480 g/day/bird for treatment groups 2 through 8, respectively. Results of growth performance showed that feed consumption levels affected final body weight and average daily gain significantly (P < 0.05) but not feed/gain (P > 0.05). Based on the broken-line regression model analysis with body weight gain data, the optimum feed consumption level for Pekin ducks was 414.2 g/day, which was close to group 6 (420 g/day) that achieved the best growth performance as compared with other groups. Apparent digestibility of nutrients did not differ significantly among the groups at the first 2 days of the experimental period (P > 0.05), whereas apparent digestibility of dry matter and crude protein significantly decreased (P < 0.05) with increasing feed consumption level at the final 2 days of experimental period. Therefore, the results indicated that excess feed consumption could not improve body weight gain further but make apparent digestibility of nutrients decline in overfed Pekin ducks.
摘要译文
一个实验的目的是要包含8饲料消耗量（随意，300，330，360，390，420，450，480克/天/只），以评估饲料消费水平的生长性能和营养物质从35天至42日龄白色北京鸭的表观消化率的影响。九十六个35日龄雄性北京鸭随机分为8个处理，每个都包含六个复制与笔笔的每两只小鸟。治疗组1为对照组的所有鸟类被随意喂食和治疗组的鸟从2到8通过灌食进行定量供给。饲料摄入量为300，330，360，390，420，450和480克/天/只为，治疗组2到8分别。业绩增长结果表明，饲料消费水平影响最后的体重和平均日增重显著（P根据与体重增加数据折线回归模型分析，北京鸭的最佳饲料消费水平为414.2克/天，这是近6组（420克/天），其取得的最好业绩增长，与其他群体相比。养分表观消化率没有显著组在第2天的试验期间差异（P而干物质和粗蛋白表观消化率显著下降（P结果表明，过量的饲料消费不能改进体重增加进一步，但要在吃得太多北京鸭的营养成分下降表观消化率。
Zhi-Guo Wen[a]; Ming Xie[a]; Ahmed-Mohamed Fouad[b]; Jing Tang[a]; Uzma Maqbool[a]; Wei Huang[a] ; Shui-Sheng Hou[a][*]. The effect of feed consumption levels on growth performance and apparent digestibility of nutrients in White Pekin ducks[J]. Journal of Applied Animal Research, 2015,43(1): 112-117