Ahmad Zaheer, Xie Ming, Wu Yongbao, Hou Shuisheng
Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
Animals (Basel). 2019 Aug 30;9(9):633. doi: 10.3390/ani9090633.
The experiment was conducted to evaluate the requirement of cyanocobalamin of male Pekin ducks from hatch to 21 days of age. A total of three-hundred-eighty-four, one-day-old meat-type male Pekin ducks were randomly allocated to six treatments, i.e., dietary cyanocobalamin (vitamin B12) concentrations of 0.00, 0.02, 0.04, 0.06, 0.08 and 1.00 mg/kg, respectively in their feed. Each treatment had eight replicated pens with eight ducks for each pen. Feed and water were provided ad libitum. The experiment was conducted for 21 days. Different growth parameters including average daily weight gain (ADG), average daily feed intake (ADFI), feed conversion ratio (FCR), and hematological indicators were evaluated because, on the basis of hematological indicators, the health and nutritional status of an animal can be accessed. It is observed that supplemental cyanocobalamin has no significant effect on ADG, ADFI, and FCR but it improves hematological parameters such as white blood cells, red blood cells, and its indices and platelet counts compared to the control group ( < 0.05). On the basis of growth performance and hematological indicators it is concluded that 0.02 mg cyanocobalamin/kg of feed is the dietary requirement of male Pekin ducks from hatch to day 21 of age.
本试验旨在评估0至21日龄雄性北京鸭对钴胺素的需求。总共384只1日龄肉用型雄性北京鸭被随机分配到6种处理组，即饲料中钴胺素（维生素B12）浓度分别为0.00、0.02、0.04、0.06、0.08和1.00mg/kg。每个处理组有8个重复栏，每个栏中有8只鸭。自由提供饲料和饮水。试验持续21天。评估了不同的生长参数，包括平均日增重（ADG）、平均日采食量（ADFI）、饲料转化率（FCR）以及血液学指标，因为基于血液学指标可以了解动物的健康和营养状况。观察到，与对照组相比，补充钴胺素对ADG、ADFI和FCR没有显著影响，但它改善了血液学参数，如白细胞、红细胞及其指数和血小板计数（P<0.05）。基于生长性能和血液学指标得出结论，0.02mg/kg饲料的钴胺素是0至21日龄雄性北京鸭的日粮需求。
