Duck laying period can be divided into four stages: 20-27 weeks old egg production, 27-30 weeks old egg production, 30-48 weeks egg production peak, 48-60 weeks old For the later stages of egg production, the main points of feeding and management are different in these four stages. First, the early and early stage of the laying of the young ducks are physically strong and energetic. The main points of management during this period are: 1. Nutrition. According to the rising trend of egg production rate, increase the nutrient concentration of diets and increase feed intake to meet the nutritional needs of egg production. At 20 weeks of age, egg-laying diets began to be used, requiring crude protein to increase from 15.5% to 19% to 19.5% and metabolizable energy to be around 11.30 MJ/kg. After the start of laying, the common mother duck group immediately increases the feed by 6-10 grams per week, which promotes the maturity of the duck body. On the other hand, the induced duck group induces a 5% egg production rate as soon as possible and rises immediately. The peak period of egg production. 2. Look at the increasing trend of egg weight. The egg is only about 65 grams at the time of first production. By the age of 30 weeks, it can reach a standard egg weight of 90-95 grams. In the early and early stages of egg production, the egg weight is increasing, and the weight gain is fast, indicating that With proper management, the trend of weight gain is slow, or the egg weight fluctuates. It is necessary to find the reasons from the feed nutrition and feed intake. 3. Look at the rising trend of egg production rate. The egg production rate at this stage is constantly rising. By the latest 32 weeks of age, the egg production rate should reach about 90%. If the egg production rate fluctuates or even declines, pay attention to the health status of the duck body and the nutrient concentration of the feed, or whether the feed has mildew. 4, pay attention to weight changes. The standard weight of cherry broiler ducks at 20 weeks of age is 3120-3150 g for female ducks and 3710-3760 g for ducks. Weekly fasting should be performed. The body weight should be maintained and the body weight should be increased or decreased. Explain that there are problems in feeding and management. In the meantime, the fat of the duck body must not be allowed to pass, especially if it is a natural mating duck. Generally speaking, the female duck will not gain weight at this stage. Attention should be paid to prevent nutrient deficiency and the duck body is wasted. 5, strengthen the sanitation and disinfection work. In the sports field and surrounding environment, drugs should be disinfected once a day. The duck house should be kept clean and dry. When the egg production rate reaches 50% and 90%, the duck body should be purified. Second, during the peak period of egg production, the egg production rate has entered the peak period, the focus of feeding and management is to maintain high production, and strive to maintain the peak of egg production until 48 weeks of age. The main points of management are: 1. To meet the needs of high-yield nutrition, increase the crude protein content in the diet, which can reach 19.5%-20%, while adding methionine and cystine, and require more than 068%. 2, a reasonable supplement of appropriate calcium and phosphorus, and in the diet to increase vitamin A, D and cod liver oil, a variety of vitamins, etc., can also be added to the diet in bone meal or shellfish piled on the playground, so that ducks feed freely. 3. The amount of feeding should be properly controlled. Generally, the average feed intake of each duck is 225-250 grams per day. Too much feeding will cause waste of cost on the one hand, and it will cause over-fertilization on the other. And affect the fertilization rate of eggs. 4. Keep the environment quiet and avoid affecting the quality of the eggs. 5, diligent eggs, reduce contaminated eggs, shelled eggs and so on. 6. Pay attention to the health status of ducks. Healthy ducks with high egg production rate are full of energy. After diving into the water for a long time, the feathers are smooth and wet after landing. Like rain, leaves and leaves, the ducks are splashed. The egg rate will not fall. If the duck is not agitated, he does not want to go into the water, or feathers get wet after entering the water, or even sinks, indicating that the duck is undernourished and there will be a reduction in production. He must immediately take measures to supplement animal protein and cod liver oil, vitamins, etc., while paying attention to the disease. Prevention. Third, after the egg-laying period, female ducks lay eggs for more than half a year and have physical fatigue. They both have the possibility of maintaining an 80% egg production rate, and they also have a sharp drop in the moth-off crisis. The management points at this stage are: 1. Appropriately increase nutrition and supplement animal protein feeds. 2. Since the female duck has reached maturity 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 declines. The material reduction method can be used for tentative reduction: Each duck is reduced by 3 grams per day and fed for 4 days. If the rate of egg production declines at this stage is relatively large, the amount of raw materials should be immediately restored. If the rate of egg production declines, it is proved that the material reduction is correct, and the method should be continued to reduce the material consumption. . 3. The light duration of 17 hours per day cannot be reduced. If the egg production rate has dropped to 60%, the number of hours of light can be increased until it is eliminated. 4. Observe changes in eggshell quality and egg weight. If eggshell quality decreases and egg weight is reduced, inorganic salt additives and cod liver oil can be supplemented. It is better to place inorganic salt boxes and allow them to freely feed. 5. To overcome the impact of climate change, the change in the microclimate within the duck house should not be too large. 6, timely elimination of residual, sub-duck and discontinued production of female ducks, if the fertility rate decreased, some of the duck can be properly replaced. 7, strengthen health and epidemic prevention, can be mixed in the diet of a variety of vitamins, etc., in order to improve the duck's disease resistance. China Agricultural Network Editor
Amino Acids are biologically important organic compounds composed of amine and carboxylic acid functional groups, along with a side-chain specific to each amino acid. With biological significance, amino acids are important in nutrition and are commonly used in Nutritional Supplements, fertilizers, and food technology. Industrial uses include the production of drugs, biodegradable plastics, and chiral catalysts.
Amino Acids
Natural Amino Acids,Amino Acids Powder,Amino Acids Particles,Amino Acids Tablets
Sinochem Jiangsu Co., Ltd. , http://www.sinochemnutrition.com