Improper weight control during brooding does not meet the standard body weight, resulting in poor skeletal dysplasia and poor feather development. As a result, the chicken population does not respond well to light stimulation. After 10 weeks of age, the overweight chickens are forcibly returned to the standard body weight by feeding less; The weekly weight gain after weeks of age is not up to standard; after 17 weeks of age, the actual weight differs from the standard weight by more than 5%, resulting in uneven sexual maturity; in order to unilaterally pursue the weight uniformity, the overweight feed is restricted to large-sized chickens, while the small-bodied chickens are encouraged to pull seedlings. The production of so-called big light chickens and small heavy chickens, thus affecting the performance of production.
Uniformity control poor uniformity mainly includes three aspects, one is the weight uniformity, the second is the body type uniformity, and the third is the fullness of the breeder, including the fullness of the lower abdomen, chest, wings and so on. There is a difference in the body size of chickens that have the same body weight and different bone sizes. The response of breeder flocks to changes in light and feed levels is not synchronized, which affects the performance of breeder chickens. Experience has shown that for every increase or decrease of uniformity by 3%, the number of qualified eggs per hen entering the house is increased or decreased by about 4 pieces.
Illumination effects Illumination plays a key role in the development of the broiler breeder's reproductive system. Illumination generally includes illumination time, light intensity, wavelength of light, and light uniformity. The rearing household generally only pays attention to the illumination time, but neglects the light intensity, the wavelength of the light, and the light uniformity, which results in the late production of the breeder.
Back-season flock management is not good for back-breaking flocks, especially for back-season flock rearing in open chicken houses.
Poor feed quality Some farmers have used feeds that do not meet the breeder's feeding standards in order to reduce feed costs. This has led to the weight of the breeders being far below the standard requirements, resulting in late production of the breeders.
Poor environmental conditions Breeding density, feeding equipment, slow and uneven feed rate, poor quality of litter, etc. will cause late-breeding breeders.
Breeding of chicken breeders in the brooding and breeding stages, coccidiosis and other intestinal diseases affect the digestion and absorption of nutrients, causing growth retardation, and difficulty in reaching the standard of body weight, leading to late production.
Waterproof Wound Dressing,Rectangle Big Wound Dressing,Waterproof Adhesive Wound Dressing,Medical Fixation Wound Dressing
Surgimed Medical Supplies Co.,Ltd , https://www.surgimedcn.com