Conformation and productivity of "Co xanh Lang Son" ducks
Research on 2 generations of “co xanh Lang Son” duck for conformation and productivity, number of 2,540 one day old “co xanh Lang Son” ducks (540 males and 2,000 females) at Dai Xuyen Duck Breeding and Research Center. Starting from 1 day of age, experimental “co xanh Lang Son” ducks were wearing the number of wings each, were kept completely in a cage (with barn filler) with a naturally ventilated playground. The results showed that: “co xanh Lang Son” duck have uniform plumage color, typically at 1 day old they were black with yellow spots on the back, the entire belly of the duck was light yellow, beak color was light pink or dark gray, with black stripes running. middle to eyes, legs were light yellow, dark gray. Adult plumage color was stable with sparrow wing color in female; Male ducks have dark blue-black neck and head feathers; The beak and legs were pale yellow, dark blue and dark gray. The age of laying at 24 weeks, body weight at 24 weeks of age was 2,408.56 - 2,416.45 g/bird, egg production 182.71 eggs /female/ 52 weeks of lay, feed consumption of 3.94 kg/10 eggs. Egg weight was 81.12 - 81.54g/egg, the rate of eggs with embryos was 92.47 - 92.80%; hatching rate/number of eggs with embryos 85.62 - 85.98%.
