Mink is an important fur animal. Its growth and development are closely related to light. If attention is paid to the control of light during production, the beneficial effect of light on its growth and development and reproductive performance can be fully utilized, which can effectively reduce the production cost and increase economic efficiency. .
The so-called lighting control is the use of artificial or modern electronic technology to simulate the changes in the natural light cycle, to provide the appropriate light time and intensity for the breeding of leeches, and to change the hair, so that the production of leeches to the human needs in the direction of faster development.
In the long-term evolutionary process, the growth and development of leeches and their reproduction have formed inextricable links with the changes of the natural photoperiod. In the natural state, leeches change with the seasons, that is, they multiply once a year with the change of the natural photoperiod, and they exchange hair twice. Under the condition of artificial light control, leeches can be bred at any time of the year, and they can effectively shorten the breeding cycle and achieve three births in two years. At the same time, the leeches can be matured in advance and slaughtered in advance, which can save feed expenses and management expenses and greatly reduce production costs.
The artificial light control scheme has nothing to do with the date of starting the shortening of sunshine. Even in the hot summer months, giving a short day of otters can promote long winter hairs in summer. However, it should be noted in production that there is a period of winter hair growth in leeches. After maturation of winter hair, prolonging the illumination time can accelerate the development of sexual organs, but it does not cause the growth of summer hairs. It does not begin until the gestation period begins. If you extend the light before winter hair matures, it will prevent the development of winter hair and inhibit the growth of sexual organs. Therefore, farmers should pay attention to the best time for artificial light control.
Production usually begins on December 21st with light control and begins to light for 1 hour per day. It extends to 8 hours per day on January 1 and increases from 15 minutes to 30 minutes every 5 days until the following year. On the 1st of the month, the sunshine hours reached 15 hours and 25 minutes. Using this method, the fertility rate of leeches can be significantly increased. In order to promote maturation of winter hair, light control feeding is generally started on June 21st in production. Most of them use 40-watt fluorescent lighting. The artificial light cycle changes to twice the local natural light cycle change rate. It is adjusted once a week to make light time. Rapidly shortening, prompting the rapid development of winter hair, usually on the winter of October 6, the fur can mature.
7 to 8 days after the end of breeding, the lamp is used to extend the illumination, and the light hours per day reach 14 and a half hours. During the light, the cover of the light control booth is opened so that the otters can fully receive the light until the birth starts and the light is stopped. Using this method, the newborn is lively, strong, and has a high survival rate.
Sterile Non-Woven Pad,Non-Woven Gauze Swabs,Medical Non-Woven Swabs,Adhesive Wound Dressings Pad
Shaoxing Gangfeng Hospital Products Co.,Ltd. , https://www.gangfenggauze.com