Oloyo R A
Department of Science Laboratory Technology, Federal Polytechnic, Ilaro, Ogun State, Nigeria.
Arch Tierernahr. 1994;45(4):345-53. doi: 10.1080/17450399409386109.
A total of 560 day-old commercial broiler chicks were used in two experiments conducted to investigate the biotin requirement of broilers fed sunflower seed meal (SSM) based diets. Two basal biotin-deficient diets based on dehulled (Experiment 1) and non-dehulled (Experiment 2) SSM were each supplemented with graded levels of biotin so that the rations had 40, 80, 120, 160, 200, 240 and 280 mcg/kg feed. Therefore a total of 14 treatments were tested. Each treatment was given to duplicate floor pens with 20 chicks each for a period of 28 days. Estimation of the live weights, live weight gain, feed intake, blood glucose and free fatty acid concentrations, lipid contents and weights of liver and kidney, and liver pyruvate carboxylase activity and the records of incidence of dermal lesions, fatty liver and kidney syndrome (FLKS) mortality and leg deformities indicated that in the case of dehulled SSM, dietary biotin of of 160 mcg/kg feed was marginal while at least 200 mcg/kg appeared to be needed for optimum performance of the birds. When non-dehulled SSM was incorporated in the diet, 200 mcg biotin/kg feed was found to be the lowest dietary level needed. However, as it seems that better results could be obtained with higher levels, 240 mcg biotin/kg with non-dehulled SSM is being recommended.
总共560只1日龄的商品肉鸡雏鸡被用于两项实验，以研究以向日葵籽粕（SSM）为基础日粮的肉鸡对生物素的需求。基于去皮（实验1）和未去皮（实验2）的SSM的两种基础生物素缺乏日粮分别添加了不同水平的生物素，使日粮中生物素含量分别为40、80、120、160、200、240和280微克/千克饲料。因此，总共测试了14种处理。每种处理设置两个重复的地面围栏，每个围栏饲养20只雏鸡，为期28天。对活重、体重增加、采食量、血糖和游离脂肪酸浓度、脂质含量以及肝脏和肾脏重量、肝脏丙酮酸羧化酶活性的评估，以及皮肤病变、脂肪肝和肾综合征（FLKS）死亡率和腿部畸形发生率的记录表明，对于去皮的SSM，日粮中160微克/千克饲料的生物素含量处于临界水平，而鸟类最佳生长性能似乎至少需要200微克/千克。当在日粮中加入未去皮的SSM时，发现200微克生物素/千克饲料是所需的最低日粮水平。然而，由于似乎较高水平能获得更好的结果，建议未去皮SSM日粮中生物素含量为240微克/千克。
