Hybridization

Commercial ducks can be produced using economic hybrid methods. For ducks produced in the cross between male ducks and mother ducks, the hybrid dominance rate is quite obvious. 1. Duck nutrition and feed The basic nutritional elements of duck include generation energy, crude protein, crude fiber, calcium, phosphorus, multi-dimensional and trace elements. There are different requirements for the quantity and quality of nutrients required for the growth stages of different production uses. The feed is mainly based on corn, soybean meal, fish meal and other raw materials. How to formulate and produce compound feeds? First, the quality and quantity of raw materials must be taken into account. The price of raw materials must be taken into consideration. The purpose of the formula is to make the formulated feeds nutritious and affordable, ie to achieve high productivity and low production costs. effect. Due to the complexity of the technology in this area, only a more applicable method is introduced here for your reference. 2. Check Feeding Criteria: Find the nutrient content requirements for the corresponding species, feeding stage, such as Beijing ducks 1-21 days, generation energy 2800 kcal/kg, crude protein 21%, crude fiber 3.5%, calcium 0.9, phosphorus 0.6%, etc., recorded. 3. Calculate the preliminary formula based on the approximate ratio of the raw materials for the diet. The proportion of dietary raw materials generally requires 40-60% of grain-type feeds (corn, barley, etc.) (2-3), bran (wheat bran, rice bran, etc.) feed 10-20%, and vegetable protein ( Soybean meal, cotton kernel cake, vegetable cake, etc.) 10 to 20%; animal protein feed (fish meal, etc.) 3 to 10%; green, juicy feed (green material, etc.) 10 to 20%; mineral feed (bone meal, shell powder Etc.) 2-7%; salt 0.3-0.5%. In the case of allowed diets, a formula is initially dispensed, and the nutrient content table of commonly used feeds is looked up and the nutrient content of the preliminary formula is calculated. 4. Comparing the initial formulation with the feeding standards, finalize the feed formulation. If an indicator is high or low, it is added or subtracted from the raw material with a low or high level of the indicator until it meets the basic criteria. The recipe at this point has already been completed. Note that trace elements, vitamins, etc. in some indicators are generally purchased as finished products, and do not have to be prepared by oneself. Self-preparation techniques are more complicated and may cause problems. There are suitable feed purchases on the general market, you can choose to purchase. In addition, as regards feeding standards, manufacturers supplying seedlings are generally provided for reference. 5. Feeding management of ducklings Ducks are called ducklings from hatching to 50 days of age, which are divided into young chicks and middle chicks. Juvenile period refers to ducks from hatching to 21-day-old, which is the most critical period in the entire duck production. Because the newly hatched ducklings are still weak in physical quality, they cannot adjust their own body temperature and are sensitive to temperature, such as Ventilation and insulation are not good, often respiratory diseases (such as colds, etc.); Second, the development of digestive organs of ducklings is not yet perfect, poor digestion, feeding care a little attention, prone to intestinal diseases (such as enteritis, etc.). Therefore, the quality of brooding work not only directly affects the survival rate and growth of young ducklings, but also affects the growth, fattening and laying of eggs.

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