Gaoyou Duck Production Performance and Brooding Management
1. Production Performance of Gaoyou Duck Gaoyou Duck has an opening period of 120 to 180 days. Early Spring Ducks (bred in March-April) opened early, long-term sunshine in early spring is conducive to the growth and development of ducks; autumn ducks (bred in July-August) will start production later, and will be allowed to open in the coming year. Egg production has the following saying: “Spring does not leave one hundred, and autumn does not leave sixâ€, that is, about 100 Eggs are produced in spring, and 60 eggs are produced in the fall. The average annual egg production is 140-160 eggs and the number of high-yield eggs is more than 200 eggs. Egg weight 80 to 85 grams. The newly-cultivated Gaoyou ducks produced high-yielding green shells, producing more than 250 eggs at 500 days of age, with an average egg weight of 73.1 grams, a green shell egg ratio of 99.2%, and an egg-to-egg ratio of 2.43:1. Gaoyou ducks have very strong reproductive performance. There is no nesting. The proportion of males and females is generally 1:20 to 33, 1:20 in early spring and 1:33 in summer and autumn. The fertilization rate and hatching rate of eggs are all above 90%. Second, brooding 2. The selection and transportation of ducklings should be done at the same time. The ducklings should be shelled, the fluff is neat, the coat color is normal, the size is uniform, the umbilical cord is contracted, the eyes are full of eyes, and the animals are active, shiny, and struggling. If it is selected as a duck, special attention should also be paid to the young duck to meet the characteristics of this breed. It is best not to exceed 36 hours for transportation. Avoid sun, rain and cold winds. When transporting, the ducklings can be placed in a bamboo straw covered with straw, covered with a thin cloth during the cool days, and covered with a quilt during the cold season; the situation of the ducklings should be frequently checked on the way and the overlapping piles should be promptly opened. 3. When the brooding temperature is appropriate, the ducklings have normal drinking and feeding activities, are evenly distributed at rest, do not play piles, are nimble in action, have quick responses and grow fast; when the temperature is low, the ducklings tend to heat and squeeze each other. When the temperature is high, the ducklings are far away from heat, drinking water increases, and appetite decreases. Under normal circumstances, 1 to 7-day-old ducklings, brooding chamber temperature 25 °C, brooder temperature 25 ~ 30 °C; 8 to 14 days old ducklings, brooding chamber temperature of 20 °C, brooding temperature of 20 ~ 25 °C; 15 to 21 days old ducklings, brooding room temperature of 15 °C, brooding temperature of 15 ~ 20 °C; 22 to 28 days old ducklings, brooding chamber temperature of 15 °C, brooding temperature of 15 °C. 4. Brooding Humidity Brooding The broiler house needs to maintain a relatively high relative humidity at the beginning of the brooding period, generally with a relative humidity of 60% to 70%. As the young ducklings increase in age and the body weight increases, the relative humidity of the brooding house should gradually decrease, generally 50% to 55%. 5. Brood density Density of brooding should be based on the season, duckling age, and environmental conditions. When brooding is used for the brooding, the ducklings of 1 to 10 days old are bred at a density of about 30 per square meter in the summer and 35 to 40 per square meter in the winter, and 11 to 20 days old. The ducklings have a brood density of 25 to 30 birds per square meter in summer, 30 to 35 birds per square meter in winter, and ducklings of 21 to 30 days old, with a brooding density of 20 to 25 in summer and winter. Only / square meters is good. When adopting the method of brooding by temperature, the brood density is based on a basket of 35 to 40 cm in diameter. For example, there are about 15 baskets in the first week and about 10 in the first week. 6. During the brooding light brooding, the light time should gradually decrease. Generally, 24 hours light is used in the first 3 days so that the ducklings have enough time to adapt to the environment and promote their drinking and feeding. It is reduced by 1 hour every day and is constant at about 12 hours after two weeks. The light intensity is at least 10 lux. For incandescent bulbs, the average illumination per square metre should be 5 watts.
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1. Brooding methods (1) Brooding from temperature. Baskets or tubs, casks, cartons, etc. can be used as brooding implements, where grass is raised, temperature is maintained by the ducklings' own body temperature, and temperature is adjusted by adding or subtracting the coverings. This method is difficult to grasp due to temperature, generally only applicable to small-scale rearing summer duck and autumn duck. When using this method to brood, the cover should have ventilation holes, which cannot be covered too tightly to facilitate the ventilation of ducklings. (2) warm brooding. The method of artificial warming is used to make the brooding environment reach the proper temperature for the ducklings. This method is mostly used for the brooding of larger ducks. At present, in addition to the more common planar brooding, online brooding and three-dimensional cages can also be used.