This article now summarizes what the reasons for the drop in egg production of laying hens are:
1. Chicken diseases can cause a sudden drop in egg production after infectious diseases in chickens. In the case of falling egg syndrome, chickens often do not have obvious clinical symptoms. The main reason for this is the sharp drop in egg production and the thinning of shells and deformities. Eggs, brown eggs increase, the rate of decline in egg production rate is usually about 10%, serious will reach about 50%. In addition, viral diseases such as: Marek's disease, infectious encephalomyelitis, fowlpox, lymphatic leukemia, bird flu, etc., as well as various bacterial diseases, mycoplasma and parasitic diseases will cause a decrease in yield. For viral diseases, prevention is the key. A comprehensive biosafety system should be established to develop a reasonable immunization program based on the local epidemic, and a corresponding immune detection mechanism should be established to properly and timely prevent diseases based on the antibody level of chickens. At the time of onset, in addition to emergency inoculation, nutritive drugs should also be added to the feed to facilitate rapid recovery of the chicken body. The prevention of bacterial diseases should focus on purification, hygiene management and disinfection, timely diagnosis and symptomatic treatment after onset of illness, and minimization of loss due to treatment.
2, feed
1 The proportion of protein and energy is imbalanced, feed ingredients are often replaced, inferior quality feeds are used such as: a high proportion of cottonseed cake is added to the feed; cooked soybean cake suddenly replaces raw soybean cake; imported fish meal suddenly replaces domestic fish meal using artificial soybean meal, inferior fish meal, and fake amino acids Such as, will make a great change in the nutritional composition of feed or make feed palatability worse, resulting in decreased egg production in chickens.
2 The feed must be moldy or deteriorate for a long time. In case of rainy weather, during the transportation or storage of raw materials or feeds, it is easy to wet or absorb moisture to cause agglomeration. In addition, after the feed processing has a certain shelf life, if the feed is placed for a long time, especially in the summer heat and high humidity season, the multivitamins in the feed are prone to decomposition and failure, while other raw materials are also prone to mildew, It will inevitably affect the quality of feed, which will lead to the occurrence of disease.
3 Insufficient feed processing management In the feed processing process, due to the negligence of the staff, excessive amounts or shortages of salt, vitamins, trace elements, amino acids, and other trace components are added, resulting in the occurrence of nutritional diseases. In addition, sometimes, due to a unit failure, the grain size of the feed changes, so that the palatability of the feed is greatly deteriorated, the chickens are reluctant to feed, and nutrition does not meet the demand, resulting in a decrease in egg production. Therefore, in terms of feed, we should first scientifically formulate feeds to ensure the nutritional needs of laying hens. Pay attention to the quality of raw materials, do not mold, not degenerate, ensure that the variety of raw materials is rich and stable, it is forbidden to feed moldy and degenerative feed. In addition, the supply of vitamins and trace elements should be ensured. The proportion of calcium in the feed should be appropriate, and the feed should have a transition period of 3-5 days to prevent the indigestion of the chickens and reduce the production of eggs.
3, feeding and management
1 Insufficient supply Some customers add to the standard amount when feeding, but due to the lack of consideration of feed energy levels, environmental changes, and the size of the birds at the time of opening, there is often insufficient supply of feed. Some people may also cause less feed due to artificially calculated material or insufficient material. In addition, old and new workers exchange or feed too much, too full, and so on, resulting in a greater waste of feed, can cause insufficient feed intake and decreased egg production.
2 Insufficient supply of water When the electricity is cut off, the keepers forget to open the drinking water valve; the water pressure is low and water supply is not available; the water line is blocked and other reasons can not supply water normally, all can cause different levels of egg production to decline, especially in the hot summer season for chickens. The harm is more serious.
3 Temperature changes The most suitable temperature for laying hens is 10-25 degrees. The temperature is too low, especially in the early winter, when the cold current suddenly occurs, the chickens are desensitized by the cold wind and then stopped production. Excessive temperatures, especially during the hot summer months, drastically reduced the feed intake of chickens and the nutrient levels did not meet the demand, causing a drop in egg production. In addition, the temperature difference within one day should not exceed 8 degrees, otherwise it will also affect the changes in the output of the flock.
4 Illumination is unreasonable The number of blackouts in rural areas is high, and power outages take a long time. After an incoming call, it cannot be supplemented with light in a timely manner, resulting in a sudden shortening of the illumination time. Sometimes due to the caretaker's negligence to forget to turn off the lights, the light hours have soared. In addition, focusing only on the illumination time and ignoring the light intensity, the light bulb (tube) does not rub for a long time, and the light intensity is weakened, all of which can lead to the disorder of the laying hen's physiological function and affect the normal production of the laying performance.
5 poor ventilation Ventilation facilities are poor, the design is unreasonable or in winter to close all the vents to keep warm, resulting in the accumulation of harmful gases such as ammonia gas, carbon dioxide, hydrogen sulfide, not only affect the egg production can also induce respiratory diseases. In addition, summer temperatures are high and humidity is high. If the ventilation is not increased, it will cause heat in laying hens.
6 Immunity, improper use of drugs Vaccination during the egg laying period, or terramycin, chloramphenicol, sulfonamides and other antibiotics or anthelmintic drugs for several days, will inhibit the rise in egg production due to stress and the toxic side effects of the drugs. If the concentration of the disinfectant in the drinking water is too high, it will cause poisoning reactions in the flock, resulting in a sharp drop in egg production.
7 Stress Factors Birds and rats enter the shed, causing frightening chickens and causing stress. At the same time, some chicken farms frequently change their staff, causing loud noises and sudden light exposure inside and outside the house, which can easily cause frightening chickens and result in a drop in production. In the feeding and management work, strict rules and regulations and operating procedures should be formulated for the above reasons, and management must be strengthened and trained regularly so as to maintain the stability of the husbandry personnel. A strict post responsibility system has been formulated and a rewards and penalties system has been strictly implemented to increase the enthusiasm of workers and ensure the normal production. The sheds should be kept warm in the summer and protected from heatstroke in the summer. They should pay attention to ventilation and ventilation, strict disinfection measures, and strengthen light management so that the light can be maintained for 16-17 hours without being arbitrarily increased or decreased. To prevent people from being scared, try to provide a quiet and comfortable production environment for the flock to ensure that the laying hens are in good condition and can fully exert their production performance.
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