Why late breeding broiler breeders
1. Improper weight control During brooding, the body weight is not up to standard, resulting in skeletal dysplasia and poor feather development, so that the chickens can not produce a good response to light stimulation. After 10 weeks of age, the overweight chickens were forcibly returned to the standard body weight with less feeding, and the weekly weight gain after 10 weeks of age did not reach the standard. After 17 weeks of age, the actual body weight differed from the standard body weight by more than 5%, resulting in uneven sexual maturation. In order to unilaterally pursue the uniformity of body weight, overfeeding was restricted to large-sized chickens, while small-bodied chickens were promoted to sprout, resulting in the production of so-called large-sized chickens and small heavy chickens, thereby affecting the production performance.
2. Uniformity control Poor uniformity includes three aspects, one is the weight uniformity, the second is the body shape uniformity, and the third is the fullness of the breeder, including the abundance of the lower abdomen, chest, and wings. 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 is increased or decreased by about 4 pieces.
3. Illumination control imperfections 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.
4. Other factors (1) Backgrond chickens, especially backfighting chickens raised in open chicken houses, are more likely to produce late. (2) In order to reduce feed costs, some farmers have used feeds that do not meet the breeding standards for breeders. This has resulted in the weight of the breeders being far below the standard requirements, resulting in late production of breeders. (3) Breeding density is too large, there are few feeding devices, the feeding speed is slow and uneven, and the quality of litter is poor. (4) Chickens suffering from coccidiosis and other intestinal diseases affect their digestion and absorption of nutrients, causing growth retardation, difficulty in achieving standard weight, and late production.
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