The first egg-laying period of the cherry grazing duck can be divided into four stages: 20-25 weeks of age is the initial period of egg production; 25-30 weeks of age is the pre-lay period; 30-48 weeks of age are the peak period of egg production; 48 The -66 week old period is the late stage of egg production. In these four stages, the main points of feeding and management are different.
First, early and early egg production. The young ducks are physically strong and energetic when they start production. The main point of feeding and management at this stage is to push the egg production rate to the peak as soon as possible.
1. Nutrition: According to the rising trend of egg production rate, increase the nutrient concentration of diet and increase feed intake to meet the nutritional needs of egg production. The use of egg production at the age of 20 weeks required a gradual increase of crude protein from 15.5% to 19% to 19.5%. The feeding mode was transitioned to free-feeding, and the feed intake was generally seen in the mother duck group (21-22 weeks). Immediately after each duck, 6-10 grams of feed per week was added to increase the rate of egg production in the duck population.
2. Look at the increasing trend of egg weight: The initial egg weight is only about 60 grams, and it should reach the standard egg weight (85-90 grams) by the age of 30 weeks. In the early and early stages of egg production, egg weights are constantly increasing, and the weight gain is fast. This shows that the management is better, the momentum for weight gain is slower or the egg weight fluctuates. Find the cause from feed nutrients and feed intake.
3. Looking at the rising trend of egg production rate: The egg production rate at this stage is continuously rising. By the latest 32 weeks of age, the egg production rate should reach more than 90%. The egg production rate should fluctuate or even decline. Attention should be paid to the duck population. The health status, nutrient concentration of the feed, and mildew in the feed.
4, pay attention to changes in body weight: Cherry Valley meat duck 20-week-old standard body weight duck 3125-3150 grams, 4105-4130 grams of ducks. During the early and early stages of egg production, fasting is performed on a weekly basis, and the weight is maintained as it is, indicating proper feeding and management, and a significant decrease or increase in body weight. This indicates that there is a problem in management. In general, duck nutrition will not occur during this period. Too much should focus on preventing undernutrition and duck body weight loss, but at the same time it should prevent the natural mating of the duck from gaining weight.
5, strengthen the sanitation and disinfection work: the sports field and the surrounding environment should be carried out once a day drug disinfection, duck house to keep clean and dry, when the egg production rate of 50% and 90% of the need for drug purification of duck body, generally 0.2% The doxycycline powder mix feed.
Second, the peak period of egg production. The focus of feeding and management at this stage is to maintain high production and strive to maintain the peak of egg production until 48 weeks of age.
1, nutrition to meet the needs of high yield. The increase in dietary protein content can reach about 20%, while adding methionine + cystine, the content of more than 0.68%.
2. The feed amount during the peak period of egg production should be properly controlled. Generally, the average daily feed intake of each duck is 225-250 grams. Too much feeding will cause waste of cost, and on the other hand, it will cause breeding ducks. Over-fertilization affects the fertilization rate of eggs.
3, to properly replenish the appropriate calcium and phosphorus, and mix in the diet of vitamin A, D and cod liver oil, a variety of vitamins, etc., can also be added to the diet in the bone meal or shellfish piled on the playing field, so that breeding duck free food.
4, appropriate feeding green feed in summer, increase the appetite of ducks, to ensure that each duck feed intake of about 240 grams a day.
5. Keep the environment quiet and avoid stress affecting egg production and egg quality. Diligent eggs, reduce contaminated eggs, shelled eggs and so on.
6. Pay attention to the health status of the duck group. Ducks with high egg production rate are full of energy, and they dive for a long time after entering the water. When they go ashore, their feathers are smooth and not wet, and the duckling production rate will not fall. For example, ducks are not plunged into spirits, do not want to go into the water, feathers are wet after being launched, and even they are Shen, indicating that ducks are undernourished or have diseases, should immediately take measures to supplement animal protein feeds or prevent diseases.
Third, late egg production
1. Appropriate supplement of animal protein feeds to increase essential amino acid content.
2. Since the mother duck has fully matured and the egg weight remains stable, the demand for nutrients from the female duck begins to decrease. The dietary rate should be reduced as the egg production rate decreases, and the material reduction can adopt a tentative reduction method: that is, each Ducks are reduced by 3 grams per day and they are fed for 4 days. If the rate of egg production declines during this period is large, the raw materials should be immediately resumed; if the rate of egg production falls to be normal, it is proved that the reduction is correct and the materials should be continuously reduced in this way.
3, to maintain 16 hours of light each day, such as when the egg production rate has dropped to 60%, you can increase the number of hours of light until eliminated.
4. Operating procedures and keeping environment should be as stable as possible to avoid large fluctuations.
5. Observe changes in eggshell quality and egg weight. If there is a drop in eggshell quality and egg weight is reduced, add cod liver oil and inorganic salt additives. It is best to place inorganic salt pots for free feeding.
6. To overcome the impact of climate change, the change in the microclimate within the duck house should not be too large.
7. Eliminating obsolete, sub-species ducks and discontinued mother ducks in time.
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