Lighting requirements for poultry breeding lights
The lighting requirements of poultry breeding lights In fact, the light source and natural light time are inseparable from light throughout the life activities and production process of chickens. Lighting includes natural lighting and artificial lighting. Natural sunlight belongs to the light radiated by the sun to the earth, and the luminous part is the wavelength of solar radiation between 397 and 686 microns. Wavelengths greater than 760 microns are called infrared rays, which can produce thermal effects; wavelengths less than 382 microns are called ultraviolet rays, which have a bactericidal effect.
The time and intensity of natural light varies with the seasons, and in different seasons, the appearance of sunlight and darkness have certain rules. In the process of raising chickens, it is necessary to master the length of natural light time and adjust the length of light time required by chickens. China is located in the northern hemisphere. From the winter solstice (December 22nd) to the summer solstice (June 22nd), the light time and light intensity gradually increase; from the summer solstice to the winter solstice, the light time and temperature are opposite. Throughout the year, June 22 has the longest sunlight, reaching 14 hours and 31 minutes; December 22 has the shortest sunlight, only 9 hours and 48 minutes. In chicken production, natural lighting and auxiliary artificial lighting should be arranged according to different brooding times and the sexual maturity period of bred chickens to meet the actual lighting time of production.
Mechanism of Lighting Action Under the action of light, deoxycholesterol in chickens is converted into vitamin D3 , which enhances the metabolism and absorption of calcium and phosphorus, and also promotes the functions of ovaries and gonads of adult chickens; The inherent rhythm in the body is synchronized with the light and dark cycle, that is, light has a certain effect on the inherent performance of the chicken's early or late mouth opening and egg production rate. The light and dark cycle restricts the ovulation and laying time of hens, and the two aspects are unified by the effect of light; the light time and intensity are adjusted to make the growth and development of chicks and rearing chickens develop in a more reasonable direction.
The mechanism of action of light on sexual maturation and egg production of hens is: after light stimulates the ocular nerve retina of chickens, some active substances are produced through the hypothalamus deep pituitary gland; then gonadotropin-releasing hormone (GnRH) is secreted to stimulate gonadotropin. Hormone-releasing hormone prompts the anterior pituitary to secrete gonadotropin (CTH). Gonadotropins cause the rapid growth and production of follicles in female ovaries and secrete steroid hormones. Due to the action of follicular sex hormones, the shape and function of the fallopian tubes also change accordingly.
