Illumination has multiple effects on Rex rabbits. Light can improve the metabolism of the rabbit body, increase appetite, increase blood red blood cell and hemoglobin content; light can also promote calcium and phosphorus metabolism in rabbits. Production practice shows that light has little effect on daily gain and feed reward of growing rabbits, and has a greater impact on reproductive performance and coat quality of rabbits. According to the test, long-term light promotes sexual maturity, and short light prolongs the maturation time; reproductive females light 14-16 hours per day for best reproductive effects. Adult females that receive artificial light have a higher number of weaned rabbits than natural light. More 8%-10%. Male rabbits do not need a long time of light. For example, if the male rabbit is exposed to light for 16 hours every day, it will lead to a decrease in testis volume and a decrease in the number of spermatozoa. Male rabbits should have 8-12 hours of light per day. Tawny rabbits and young rabbits require less light, especially rabbits, usually 8 hours a day low light. According to another test, if the light is continuously for 24 hours a day, it will cause reproductive dysfunction in Rex rabbits.
Light affects the growth and removal of rabbit hair. In practice, it is found that when the rabbit is in the finishing period, a short and dim light will help the coat to grow, change the hair more quickly, and make the coat whiter. If the light shines for a long time, the rex rabbits in the finishing period will have rough hair and will change hair. Slower. Studies have shown that the above conditions are related to the release of melatonin, ie, darkness contributes to the release of melatonin, and melatonin promotes the growth of coat.
In addition, the light also affects the rabbit's seasonal fur change. Whether it is light from long to short, or from short to long, it will lead to hair exchange.
The control of light in rabbit farms should be treated differently for different rabbits. The fattening rabbits require 8 hours of low light, the male rabbits require 12 hours of medium light, and the breeding females require 16 hours of strong light before mating. Therefore, the control of the light of the female rabbit in production is the most important. Especially in the short-lighting season of the year, many rabbit farms will experience a series of reproductive disorders such as estrus in females, lack of mating, or low conception rates. From the light point of view, there are four problems.
First, in most rabbit farms in China, three overlapping rabbit cages are used, and the light source is suspended above the cage. Because of the isolation of the shroud plates, only the upper cages receive sufficient light, while the middle and lower cages do not receive the light. Due lighting.
Second, there is insufficient lighting time. In winter, the illumination time in most areas in China is less than 12 hours, which is far from the suitable illumination time for females to promote estrus before mating.
Third, the light intensity is low. Rabbits need more than 20 lux of light intensity during the breeding period, but the light intensity of 60 lux is better for aphrodisiac. The incandescent lamp emits approximately 12.56 lux per watt, but the value varies depending on the size of the bulb and whether or not there is a lampshade. Generally, when there is a lampshade and the lamp height is 2-2.4 meters, a l-watt bulb per 0.37 square meter is required, or A bulb of 2.7 watts on an area of ​​1 square meter can provide 10.76 lux. According to this calculation, a standard 15 square-meter rabbit house reaches an average illuminance of 20 lux and requires a 75 watt bulb. However, the light intensity of most rabbit houses is insufficient. On the one hand, it is not enough to install the lamp wattage, the second is that there is no increase in the lampshade, and the third is the long-term exposure of the light bulb, which is polluted by dust and fly excreta and seriously affects the radiation of light.
Fourth, uneven lighting. Some rabbit farms not only have large differences in the light intensity between the layers of the cage, but also have uneven lighting positions in the lighting fixtures, affecting the light that some female rabbits should receive.
Based on the above situation, the author conducted experiments in some rabbit farms with poor heat conditions. For the head-type three-layer overlapping type cage, a three-dimensional light source is arranged in the middle of the walkway, a group of light sources is installed every 2-2.5 meters, and each group of 10W energy-saving lamps has 3 suspension heights and the upper edge of each cage. parallel. After 6-7 days of continuous light exposure, the estrus rate was over 95%, and the rate of fetus (overlay) reached over 90% with good results. Therefore, for most rabbit farms, the short-light season must pay attention to manual supplemental lighting, but also pay attention to the methods and techniques of supplementing light.
Food Additives,Pea Starch Powder,Food Grade Pea Starch,Soy Peptide Powder
Xi'an complex bio-tech CO.,LTD. , https://www.complexpowder.com