Riboflavin requirements of white Pekin ducks from hatch to 21 d of age
Riboflavin requirements of white Pekin ducks from hatch to 21 d of age
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DOI：
10.1080/00071668.2013.783901
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发表时间：
2013-06-01
影响因子：
2
通讯作者：
Hou, S. S.
中科院分区：
文献类型：
--
作者：
Tang, J.;Xie, M.;Hou, S. S.
1.采用2 × 8析因试验设计，研究了不同性别（雌、雄）和8个核黄素水平（1.2、3.2、5.2、7.2、9.2、11.2、13.2和15.2mg/kg）对白色北京鸭从孵化到21日龄的核黄素需要量。2.选用1日龄北京鸭640只，雌雄各半，随机分为8个处理组，每组8只，共80个铁丝网围栏，每个处理组设5个重复。从孵化到21日龄。在21日龄时测定增重、采食量、饲料转化率、血浆和肝脏核黄素含量。3.核黄素缺乏会导致鸭生长抑制、死亡率升高、血浆和肝脏核黄素含量降低，这些不良影响可通过提高日粮核黄素浓度来减轻。随着日粮核黄素水平的增加，增重、采食量以及血浆和肝脏中核黄素浓度均增加。4.根据折线回归分析，现代白色北京鸭从孵化到21日龄的增重、料肉比、血浆核黄素和肝脏核黄素的需要量，公鸭分别为3.31、5.20、3.85和3.91mg/kg，母鸭分别为3.27、3.33、3.84和3.28mg/kg。与雌鸭相比，公鸭对核黄素的需求量更大，这可能是由于公鸭的增重和肝脏核黄素含量显著高于雌鸭。
1. A 2x8 factorial experiment containing different sexes (female and male) and 8 dietary riboflavin concentrations (1.2, 3.2, 5.2, 7.2, 9.2, 11.2, 13.2 and 15.2mg/kg) was conducted to evaluate the riboflavin requirements of male and female White Pekin ducks from hatch to 21 d of age. 2. A total of 640 1-d-old Pekin ducks including 320 male and 320 female birds were randomly distributed into 80 wire-floor pens of 8 birds, sexed separately and with each treatment group containing 5 replicate pens. The birds were raised from hatch to 21 d of age. At 21 d of age, the weight gain, feed intake, feed conversion ratio and plasma and liver riboflavin were measured. 3. Growth depression, high mortality and low plasma and liver riboflavin were observed in riboflavin-deficient ducks, and these ill effects could be reduced by increasing dietary riboflavin concentrations. Weight gain, feed intake and riboflavin concentration in plasma and liver increased as dietary riboflavin increased. 4. According to broken-line regression analysis, the riboflavin requirements of modern breed of White Pekin ducks from hatch to 21 d of age for weight gain, feed conversion ratio, plasma riboflavin and liver riboflavin were 3.31, 5.20, 3.85 and 3.91mg/kg for male and 3.27, 3.33, 3.84 and 3.28mg/kg for female, respectively. Compared with female birds, more riboflavin was needed by male ducks, which may be because of significantly greater weight gain and liver riboflavin content of male ducks.