DETERMINATION OF MEAT PRODUCTIVITY OF «BLAGOVARSKY» CROSS DUCKS
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Дата
2021
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Анотація
Feeding is the main condition for high productivity of ducks. It provides the need for metabolizable energy and nutrients according to modern standards. Ducks have an increased need for arginine, histidine, tryptophan, glycine, threonine and valine, therefore much attention is paid to the amino acid composition of feed in normalizing feeding. It is also important to consider the level of digestibility of the proposed feed. The feed nutrients digestibility depends on various factors and therefore varies considerably.Optimal ratios of carbohydrates, proteins, fats, etc. in the diet contribute to a high level of digestibility. The level of fiber and protein significantly affects the digestibility of nutrients in the feed. Increasing the amount of fiber (especially rich in lignin) reduces the digestibility of fiber and other nutrients. Essential influence on the nutrients digestibility is caused by the available protein content in the feed and its ratio with carbohydrates and fats. In this regard, the protein ratio of feed is determined. The protein ratio shows how many parts of digested nitrogen-free nutrients account for each part of digested protein.In addition, the feed preparation for feeding has a positive effect on their digestibility (moisturizing, enriching, grinding, steaming and others). The nutrients digestibility is also affected by different levels of macro-, micronutrients and vitamins in the feed. Increasing the feed nutrients digestibility is an important factor in reducing their costs, the cost of livestock products and improving the economic efficiency of the industry. Young ducks are characterized by precocity and high growth rate. At the age of 7 weeks, the live weight of hybrid young ducks is 3.2 – 3.4 kg, and during this period the initial weight increases more than 60 times at a feed consumption per 1 kg gain of 2.8 - 3.0 kg and average daily gain 64 - 68 g.The positive effect of the use of the developed vitamin-mineral premix in the compound feed composition on the meat productivity of “Blagovarsky” cross ducks has been determined. It was determined that from the third week of growing the live weight of young ducks of the experimental group was higher of analogues of the control group for 3,2 %. Analysis the main indicators of young ducks productivity showed that the bird of the experimental group exceeded analogues in the following periods of growth: 0 - 7 days, 15 - 21 days, 29 - 35 days, 36 - 42 days, 43 - 49 days.Survival rate of young ducks was at a high level in the range of 97 – 99.5 % for the entire period of growing in both groups. Starting from the 4th week of growing, the survival rate decreased slightly in the control group and amounted to 99.1, which is 0,2 % less than in the experimental group. The increased concentration of premix in the compound feed for the young ducks of the experimental group help to improve their slaughter qualities in comparison with the control group.