Xu Chengfu of Xuancheng, Anhui Province, told the newspaper “The Pastoral Doctor 110†that he bred about 1,200 yellow chickens under the forest and entered the egg production period at the age of 170 days. He had already laid eggs for about half a month, despite the thickness of the shells. Egg shape is good, but the egg production rate is not high, the main feeding is rice, corn, etc., feeding about 75 kg per day. He asked: Why is the egg laying rate not high? Is it related to less cultured cock? Is there any way to improve?
Li Yin said that because of physiological factors, first-lay laying hens produce less eggs themselves, and have nothing to do with the number of cockerels being raised. They generally do not have enough calcium and phosphorus in the feed, and have short light periods and diseases during the laying period (Newcastle Disease). , avian flu, coccidiosis, etc.) and other reasons. In addition, over-fat chickens also have a certain effect on egg production.
According to Xu Chengfu's statement, chickens in his family are less likely to cause decreased egg production due to insufficient calcium and phosphorus content in the disease and feed, which should be caused by the newly opened laying hens, unstable egg production and insufficient illumination time. .
To increase the egg production rate of newly laid laying hens, first of all, we must strengthen feeding and management and increase the feeding of nutritious feeds, such as strengthening the insulation of housing and controlling the humidity inside the house, so that the temperature in the house is controlled at 18 to 23°C and the humidity is 50%. ~ 60%, and strengthen ventilation, promote air circulation, reduce the content and density of bacteria in the house.
Generally, the daily illumination time of laying hens should reach more than 16 hours, and the production time of the laying hens is too short and the production rate of egg production drops. Gu Shaopeng from Shanxi Agricultural University Department of Veterinary Medicine has conducted experiments on the effect of different illumination time on the performance of layer chickens. The results of the experiment showed that 14 hours, 15 hours, and 16 hours of light were applied per day. Consumption and other groups have little difference, but the daily illumination of laying hens for 17 hours can increase their egg production rate, reduce feed consumption and aquaculture costs, and increase economic efficiency.
During the production process, the laying hens can use a red or white 10-watt white woven lamp to prolong the lighting time of the laying hens. The laying hens can increase the egg production and egg weight of the laying hens. The density of the white woven lamp should guarantee the light in the sheds. Even without dark areas, lights are normally added before sunrise and after sunset.