Duck duck is different from meat duck, especially sensitive, it is easy to form a stress response, from time to time affect the intake, change the laying time, severe egg production rate dropped sharply, and even cause hair loss moulting production, if this reaction Occurs in the fall and winter seasons and is not controlled for a short period of time, resulting in the production of several months of discontinued production. (a) Why egg ducks often have stress reactions, how is it formed? 1. Changes in feed varieties. The original feed pellets, suddenly changed to feeding powder, eating the ducks used to feed the former, see strange new food, will walk away do not eat; and such as green feed and fish, loach, snail, etc., are Ducks and ducks are very fond of feed, but if they have not been fed before and have not been trained, the first time they put new materials such as green or small fish and loach in the feeding trough, the ducks will not dare to eat when they see it. . 2. Change the feeding method. It was originally fed 4 times per day and night. If it was changed to 3 times, or if 1 feed was removed at night, the ducks would not adapt to the night and lay eggs at night. On the 2nd day, the number of “day eggs†increased, and the egg production rate on the 3rd day. Just come down. 3. The management process changes. Feel free to delay or advance the time for dropping ducks and ducks. If the time of change is too large, it will immediately cause stress. If you change lighting, you would turn on the lights every night at night, if there is light at night, if there is a sudden power outage, there is no Taking lights to supplement the light may cause a lot of noise in the ducks. 4. Improper mobilization of feeding managers can also cause stress. Because each breeder's habits and methods of operation are different, such as frequent substitutions, so that the duck population can not adapt to the emergence of stress. (b) How to prevent stress from occurring and maintain stable yields? After knowing that ducks and ducks are more sensitive to neurological types, they should always be on the principle of stability when formulating feeding management procedures or changing any technical measures. Do not change them easily, change them, and do so gradually. mutation. If the season changes, from early spring to summer, the time for ducks to go out every day will be about 2 hours earlier, and the time for ducks will be delayed by about 2 hours. This change will be gradual and can be advanced or postponed by 10 minutes or every week. Change 1 time, 20--30 minutes each time, and change after 1 week of stabilization. Another example is to change the feed type, assuming that the original feed pellet feed, if you want to feed the powder, you can not suddenly, should be mixed in the pellet feed 30% of the powder, feed 5--7 days, then increase the powder The proportions, grains and powders were mixed and fed for 5 days, and then the mixture was changed to 70% of powder and 30% of particles. The mixture was fed for 5 days, and then the whole transition to powder was adopted. This gradual transition method was used for ducks. The group can adapt without causing stress. In the same way, if you want to feed new varieties such as snails and loach, you must adjust them properly so that they can adapt slowly and cause no stress. Shaoxing ducks are particularly sensitive to nerves, and are more likely to trigger stress reactions than other varieties such as Kang Beibei and Jinding duck. This is one of the reasons why some new districts have poor Shaoxing ducks and cannot maintain high and stable yields. In order to avoid stress in the duck population, the duck house must be kept quiet and stable in the small environment. In addition to the regular time for the breeder to work in the duck house, any stranger should be refused admission. 1 month before the start of production, immunizations for major infectious diseases such as duck plague and fowl cholera will all be completed, and group work will also be completed. After the peak period of production, do not catch ducks, inject or group Interfering with work, so as not to induce stress.