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Spring Breeding of Laying Hens Beware of Slow Laying Syndrome
There is no better way to breed egg-laying chickens than to allow the chickens to reach peak egg production on time (150-160). However, in more cases, it is counterproductive. Many chickens produce 70% to 80% of eggs. Temporarily, the rise is slow, there is no peak period, or the peak period is short and the eggshell quality is not good. In some cases of intestinal disease or indigestion, it is useless to use a large number of medicines for chickens. Serious people can only be eliminated, sometimes feed factories and breeder farms and veterinary drug factories, but veterinarians are inexplicably the target of venting farmers. I think there are many reasons for the unsatisfactory production of eggs. Such as: feed energy, season, chicken weight, chicken uniformity, management, disease and other factors, led to slow egg production. So call it "Slow Laying Syndrome." Metabolic energy level in feed - energy determines egg production rate in the age of entry hen egg production metabolic energy level (energy) kilocalorie around the 80s 2700 - 2750 1995 foreign 43 pounds 2950 domestic 38 - 40 pounds 2800 2001 abroad 46 kg 3000 domestic 40 - 42 kg 2900 - 2950 The above table is the energy level of nearly 20 years. It can be seen from the table that the higher the level of metabolic energy, the higher the egg production performance. Just like a good car with good oil, what would happen if a Santana 3000 luxury car plus 90th gasoline (normal plus 97 gasoline)? Performance can be imagined. The breeding of laying hens in China is also a principle, and the most advanced varieties are introduced in China. In 2001, the laying hens had an egg production performance of more than 46 pounds. We want to make the chickens reach the metabolic energy of 38 pounds of egg feed to reach 2800 kcal. In order to increase the metabolizable energy, the bran in the egg production is removed and replaced with corn. At the same time, adding 500 g of Enzyme to the United States Gaojing Company per ton of feed can increase the metabolic energy by 150 kcal, equivalent to the release of 2% of soybean oil. Energy (2800) is crucial to maintaining peaks. Recently, most farmers use corn with high moisture content, which leads to lower metabolic energy of the feed. Therefore, it is recommended that all farmers increase their metabolic energy levels as soon as possible. Management factors prompt replacement of egg production peaks, when the chickens reach the standard body weight at 105 days of age, the time will not lose the opportunity to feed transition to egg production. The light is adjusted to 13.5 hours, shells (stone powder) are added to 3%, 112 days 4%, 119 days 5%, and when the egg production reaches 10%, it is added to 8% (if the body weight is not ideal, only nutrition can not be added) ). To ensure the fallopian tubes, ovarian development and calcium and phosphorus reserves, within 160 days of age to achieve the standard body weight of chickens, thereby accelerating the speed of egg production. Epidemiological factors 1. Variation in the incidence of transmission: The disease can occur throughout the year, with high incidence in winter. The disease is most common in birds at the peak of 160-300 days of age. Other age groups also have morbidity. Chickens that do not reach peak levels do not rise or rise slowly, and egg production at the peak falls 20-40%. The flock has dropped to 10-20%. The diseased chickens developed cough, swish, thrown nose, and thin green manure. The initial eggshell decline in egg production did not change much. During the recovery period, misshapen eggs, small eggs, sand eggs, soft shell eggs, etc. were found. The egg thin was as thin as water, and the anatomical tracheal hemorrhage, mucus, follicle hyperemia, and severely deformed ruptured. Tubal edema, a variety of stress factors is the main cause of the disease, conventional transmission and vaccine can not prevent the occurrence and prevalence of the disease, severe pollution in areas should be 1-10 days of age and 10-20 days of immunization twice reproductive Type P26 freeze-dried seedlings were used 115-day-old Yibang triple oil seedlings (including variant transmission), and 1 ml/subcutaneous injection into the neck. Prevention and control programs: Four days of prevention for the prevention of epidemic disease triple oil seedlings (including variant inheritance) for 120 days. Strengthen ventilation, increase nutrient concentration, thereby increasing immunity and preventing disease. Recommended treatment plan: Kanger 200 pounds of water + diarrhea and quick 400 kilograms of water + Victoria Li Po 200 pounds of water mixed drinking water for 3-5 days. The feed is added with 200 jins of Yiqi Livi bag and used continuously for 10-15 days. After that, 500 lbs. per bag is used for a long time. 2. Transient encephalomyelitis In the late autumn and early winter seasons, healthy chickens have experienced a 5-10% reduction in egg production within 5-7 days, and the egg weight has decreased. After another 5-7 days, the egg production rate has even risen above the original level. If a dedicated program is used to restore the speed of egg production, the decrease in egg production will be reduced. Suggested solutions: Kanger 200 pounds of water + Victoria Weili Po 200 pounds of water mixed drinking water for 3 days, minutes use sooner or later. Can greatly reduce the loss. 3, reproductive transmission of the disease more performance in the initial production of laying hens and the peak period, the appearance of normal appearance, feeding and fecal performance of the chickens appear the following situations: First, the appearance of symptoms: 1, no peaks, individual chickens The group reached only 30-80% in 160-200 days. 2, thick crown, bright red (redder than normal chickens) do not produce eggs, also known as false hens. 3, sagging abdomen, a sense of puffiness, similar to penguin-like. The incidence rate is about 10-20%. Second, the anatomical symptoms: a cyst in the hose, the cyst is also clear and transparent tasteless, cysts of different sizes, there are also 5-7 mature follicles. But there is no complete fallopian tube, unable to lay eggs. Some chickens had no ascites, there was tubal stenosis, blind or no fallopian tubes. Some have fallopian tubes only less than 10cm (normal 63-67cm). The disease was infected on the 1-3 day old and had a transient respiratory symptom. No death, but it will affect future egg production performance. Third, control programs: 1, the implementation of high temperature brooding, and to ensure a constant temperature, the first three days of not less than 35 degrees. The birds were evenly distributed and did not show mouth breathing as a criterion. Because the temperature of winter brooding is not easy to control, the incidence of chickens is higher. 2, strict disinfection of contaminated chicken farms. 3, 1-3 days old eyes with Rr-H120-p26, 1-2 drops each. 10-20 days two free. To eliminate chickens in a timely manner, appropriate use of antiviral drugs and antibiotics should be controlled, combined with multidimensional (Vivipo or vitality) drinking water, in order to increase egg production rate.