Breeding chickens are also referred to as mid-chicks, and generally refer to chickens that are growing from 7 to 20 weeks of age. Breeding chicken feathers have been full, with a sound body temperature regulation and adaptability to the environment, appetite, and rapid growth. In rural areas, some chicken farmers often neglect the feeding and management of laying hens, causing chickens to become over- or over-weight, and premature or delayed production, making it difficult for chickens to sustain high yields. In the following, we will talk with chicken farmers about matters that should be paid attention to in the rearing management of broilers. First, the nutritional level of broilers and feed formula bred chicken digestive function gradually improved, feed intake increased, skeletal muscles are in a period of vigorous development. The nutrient level at this time should be quite different from that of the chicks, especially the protein level should be gradually reduced and the energy must be reduced. Otherwise, a large amount of fat will accumulate, causing excessive fat and affecting the egg production in adulthood. Diet formula: First, 7 to 14 weeks old. Cornmeal 54.13%, sorghum 7.0%, wheat bran 10.0%, barley 5.0%, fishmeal 5.0%, bean cake 10.0%, leaf powder 6.0%, bone meal 2.5%, Salt 0.37%. The crude protein content in the diet should reach 15%, metabolizable energy 11.49 MJ/kg, calcium 1.70%, and phosphorus 0.6%; the second is 15 to 20 weeks old. Maize noodles 47.13%, 10.0% sorghum flour, 15.0% wheat bran, 12.0% barley, 2.0% fishmeal, 4.0% soybean meal, 7.0% leaf powder, 2.5% bone meal , Salt 0.37%. The content of crude protein in the diet should reach 13%, metabolic energy 11.28 MJ/kg, calcium 0.9%, and phosphorus 0.5%. In addition, a variety of Vitamins and trace elements are added in the feeding process to meet the physiological needs of broilers. Second, control of mature maturity control can increase egg production, reduce the number of unqualified eggs, and increase the average egg weight. Control measures include two aspects: One of the restrictions on keeping is to limit the level of nutrition. It is to reduce the content of crude protein and metabolic energy in the diet, reduce the proportion of dietary fishmeal and cake energy feeds, such as corn and sorghum, and increase the feed with low nutrient content and large volume, such as bran, leaf flour, etc. . Limit levels are generally: 7-4 weeks of age in the diet of crude protein was 15%, metabolizable energy 11.49 MJ / kg; 15-20 weeks of age protein was 13%, metabolisable energy 11.28 MJ / kg. The second is to limit the amount of food consumed. The whole day's feed can be fed once in the morning until the end of the day, or the total amount of feed for the week can be fed in 6 days and stopped for 1 day. No matter which method is adopted, it is required to have enough feed troughs so that each chicken can eat feed at the same time so as not to affect the consistency of the growth and development of the chickens. 2. Limiting light illumination is an indispensable and important measure in the production of chickens, especially for broilers. Limiting the light during the breeding period is mainly to prevent premature chickens. The method is to use artificial light to control the daily light receiving time of the flock within 8 hours. A 15 watt light bulb was installed in the shed, the installation height was 2 meters, and the bulb spacing was 3.6 meters. The illuminance was about 5 lux. The lighting time in this period should be relatively stable, and do not appear to gradually increase the light. Third, strengthen management. Pay attention to the ventilation condition of the broiler house, especially in the summer, be sure to create conditions to convection the sheds; even in the winter, we must properly change the air in order to keep the air in the house fresh. In a well-ventilated and well-ventilated chicken house, people do not feel sulking, glare, and pungent after entering. 2. Maintaining proper density If the density is not reasonable, even if other feeding and management work is good, it will be difficult to cultivate the ideal high-yielding chicken population. In the rearing period, the suitable density per square meter is: 7 to 12 weeks old, 10 to 8; 13 to 16 weeks old, 8 to 6; 17 to 20 weeks old, 6 to 4 birds. 3. To reduce the daily management of stress response, we must strictly follow the operating procedures, and try to avoid interference from external factors. The action should not be rough when catching chickens; be cautious when vaccinating; do not wear special clothes suddenly appear in the shed to prevent fry groups and affect the normal growth and development of chickens. 4. When the cages are caged in a timely manner, they will be transferred to the cages in a timely manner in the later period. Generally, they are completed 2 to 3 weeks (18 weeks) before the start of production, and it is best to be carried out at night to avoid riots. After being basketed, the chicken should be allowed to drink water and eat as soon as possible to stabilize the unstable mood. If it is close to the start of production and then transferred to the cage, it often delays the opening of production, causing unnecessary losses. Turning groups should be combined with rectification of the flock, those who are slow growth, or significantly weaker weight, single out feeding management, as soon as possible to catch up with large groups; those who are too weak or sick should be eliminated. China Agricultural Network Editor
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