XÁC ĐỊNH MỨC NĂNG LƯỢNG VÀ TỶ LỆ PROTEIN THÍCH HỢP TRONG KHẨU PHẦN ĂN CỦA VỊT CỔ LŨNG BROILER GIAI ĐOẠN 29 NGÀY TUỔI ĐẾN GIẾT THỊT

Abstract

Ducks from 29 days of age were raised until slaughter at the Livestock and Agricultural Services Co., Ltd farm in Yen Dinh district, Thanh Hoa province. Upon reaching one day of age, experimental ducks were individually identified with wing numbers.
They were fed industrial feed with varying energy and protein levels, housed in cages with barn fillers and naturally ventilated playgrounds. The experiment comprised 9 treatments, each repeated 3 times, with energy levels of 2800, 2850, and 2900 Kcal/kg DM corresponding to protein ratios in the diet of 16, 17, and 18%. The results indicated that the Co Lung broiler ducks exhibited a high survival rate ranging from 98.00 to 99.33%. By the age of 8 weeks, the body weight ranged from 1576.54 to 1774.97 g/head, with the lowest body weight observed in treatment 2 and the highest in treatment 6. By 12 weeks of age, the body weight ranged from 2055.75 to 2189.06 g/head, with the lowest weight in treatment 2 and the highest in treatment 6. Over the period from 0 to 12 weeks of age, the average daily feed consumption was 124.15 g/day, with feed consumed ranging from 3.75 to 4.03 kg/kg weight gain. The feed conversion efficiency of ducks in treatment 6 was higher than that of the other treatments, ranging from 0.13 kg of feed/kg of body weight gain. To achieve the highest economic efficiency, it is recommended to use energy at 2850 Kcal/kg DM and 18% protein in the diet.