The purpose of laying hens in the growth period is to prevent broilers from eating too much feed, reduce fat accumulation in the body, and improve egg production performance; prevent premature sexual maturity, maintain standard body weight, and timely production; reduce costs and maintain peak egg production High and long. However, if the feed restriction does not meet the growth pattern of the chicken, it cannot achieve the desired effect. 1. The actual growth pattern of laying hens The growth of young female hens is a discontinuous process. The growth rate as a function of time presents an S-shaped curve; the first peak of growth is 7-8 weeks of age, after which the growth rate gradually decreases until the second growth peak occurs when sexual maturity occurs at 15-16 weeks of age. 2. Current feed restriction programs are generally allowed to eat freely before 6 weeks of age. After 6 weeks of age, restricted feeding was carried out until the egg production rate reached 5%. This restricted-feeding program has limited feeding during the two growth peaks of hens, which results in insufficient growth and development of the hens. It is easy to cause the early and mid-week weights of the new hens to be consistent with the standard growth curve, but the production is open. When the weight is lower than the standard weight. After the start of the production period, the constitution is weak after the start of production, and the average egg weight should be extended. The peak of egg production does not last long. 3. Feed restriction program adapted to the hen growth model According to the growth pattern of the new hen, 0-8 weeks of age were adopted for free feeding to stimulate the early growth and muscle development of the new hen, and the chicken body was robust. 9-14 weeks of age are restricted to avoid unnecessary fat deposition, and then gradually increase the level of feeding 15-16 weeks to promote the full development of the reproductive tract. The restriction of feeding for the first 4 weeks before the start of production can avoid the diseases such as rectal prolapse caused by the excessive fat deposition in the cloaca, and reduce the number of small eggs after opening. Before 8 weeks of age, the chickens were allowed to eat freely, were appropriately overweight, had good physical and health status, and were conducive to the growth and development of various organs and systems in the breeding period, which laid a good foundation for future production. This period of fast growth, although overweight, but will not deposit too much fat in the body, increase the weight of muscle and the system. 9-14 weeks of age limit the implementation of feeding, maintain the standard weight, so the period is the main stage of bone development, growth is slow, if not limited to feeding, then the excess nutrients into fat deposition, resulting in overweight chicken body, both a waste of feed, It also affects its future growth performance. In feeding, it should meet its nutritional needs and provide full-price quality feed. 15-16 weeks of age is the main stage of growth and development of the hen's reproductive system. It is necessary to increase the level of feeding to promote the growth and development of the reproductive system, laying the foundation for improving production performance. Restricted feeding during the first 4 weeks before the start of production, the weight of fattened chickens dropped a lot at one time, but they recovered quickly. Generally, the weight of chickens did not drop much, which could improve the performance of laying eggs. The above method is also effective for the feeding of broiler breeder hens.
Food Ingredients
Natural Pigment,Beta Carotene,Herbal Extract
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