Ducks are best not to grazing, feeding full-priced compound feed, from the ducklings to the end of the production of eggs are kept in the duck housing that is captive. According to the duck house structure can be divided into closed and semi-open breeding. All-closed rearing means that all the venues for the ducks are indoors (including sports grounds and egg-laying rooms); the semi-open rearing means that ducks have their egg-laying rooms indoors and the playing field outdoors. 1. Grouping of breeding ducks and appropriate breeding density Each duck group should be suitable for about 500 birds. When grouping, try to achieve the same variety, the same age and size. The breeding density of young ducks varies with the age, seasonality, and temperature of the ducks. Generally, they can be mastered according to the following standards: 4 to 10 weeks of age, 12 to 20 per square meter; 11 to 20 weeks of age, 8 to 12 per square meter only. 2. Management of captive young ducks (1) Appropriately strengthen exercise, promote bone and muscle development, prevent excessive fat. Every day, the ducks are rushed to do circular motions in their homes, each time 5 to 10 minutes, 2 to 4 times a day. (2) More contact with ducks to improve the guts of ducks and prevent frightening herds. (3) Lights for overnight lighting, low light lighting. (4) To prevent infectious diseases, the ducklings and fowl cholera will be mainly prevented during the young duck stage. 3. Ducks reared before and after the start of production Most of the laying ducks started production at 150 days and reached the peak of egg production at 200 days. The goal of feeding and management in this period is to push the egg production rate to the peak as soon as possible. According to the rising rate of egg production, the nutritional level should be continuously increased, the nutritional concentration of the diet should be increased, the number of meals fed should be increased, and the feed intake should be increased to meet the nutritional needs of the laying eggs. The average daylight of the ducks is not less than 14 hours. The light should be gradually increased from short to long, until the day and night light is 16 hours. The appropriateness of feeding and management at this stage is observed in the following three aspects: (1) Look at the increasing trend of egg weight. The rapid increase in weight shows that it is well maintained. (2) Look at the rising trend in egg production. At the latest by the age of 200 days, the egg production rate should reach about 90%. (3) Look at changes in body weight. The body weight maintained at the time of opening shows that the husbandry was properly managed. 4. Maintain ducks During the peak period of egg production, ducks consume more energy and their health is not as good as the initial and early stages of egg production. At this time, if the nutrition can not meet the needs, the egg production will decline, or even change the hair, which is difficult to raise the stage. In order to maintain peak egg production, we must pay attention to the following issues: nutrition to ensure the needs of egg production, feed nutrient concentration slightly higher than the previous stage, appropriate increase in protein, vitamin and calcium feed; daily light stability at 16 hours , can not be changed; daily operating procedures to maintain stability, the best room temperature is maintained at 13 ~ 20 °C. Whether the feeding management is appropriate or not at this stage depends mainly on whether the egg production rate is stable at the peak level. In daily management work, carefully observe the following: (1) Eggshell quality. Good egg shells should be smooth, thick and shiny. (2) egg production time. The normal laying time is 1-2 hours late at night, and (3) the mental state of the duck group. Healthy ducks with high egg production rate are full of energy, diving for a long time after entering the water, and feathers are smooth and non-wet after landing. When abnormalities are found, the cause must be identified and treated symptomatically. 5. It is difficult to maintain the peak of egg production at the later stage of egg production and management until the peak of egg production. However, for high product species, such as proper feeding and management, it can still maintain egg production rate of about 80%. To achieve such a level, we must seriously do a good job of rear feeding management. The main points of the post-feeding management are: (1) Determine the quality of the feed and the amount of feed based on the body weight and egg production rate. Do not increase or decrease the feed blindly. (2) Keep lighting for 16 hours per day and do not reduce. (3) Manage properly, put more and less clearances, and promote activities. (4) Observe changes in eggshell mass and egg volume. If there is a drop in the quality of egg shells or a reduction in egg weight, fish liver oil and inorganic salt additives can be added.
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