Through the estrus identification, it can be judged whether the female deer is estrus or not, whether the estrus is normal or not, and at what stage to determine the timely mating. The characteristics of various deer estruss are common, and there are also unique behaviors of breeds and individuals. The estrus identification should be treated differently. The female red deer has less obvious sexual behavior than the female deer, and the time is short and concentrated. Attention should be paid to observation. The velvet deer estrus identification method is commonly used in the following three methods: First, the direct observation method: According to the estrus performance of the female deer, determine the status of estrus in the period, in the breeding season there should be someone to observe carefully several times a day, and make records, especially sooner or later Time, every 2 hours or so, in order to understand the entire process of changes in heat, and accurately identified. The second is the test method: According to the female deer to determine the estrus and estrus time of the sentiment of the sentinel Bucks, this method is accurate and reliable, it must be used when artificial insemination. During the breeding period, the test bucks are regularly placed into the deer's quarters every day to allow the deer to freely access the female deer. The female deer does not move, and the deer is allowed to cross and mate. Try the tactics: Take a piece of fine white cloth 5 centimeters long and 3 centimeters wide, and sew a cloth around it, squat in the waist of the Bucks, and wrap the penis so that the semen shoots in the cloth, but it does not affect the Bucks. Climb and ejaculate. The method is simple and practical, and the buck can be replaced at any time. However, attention should be paid to checking the position of the test cloth and adjust it in time to prevent it from moving. Bucket vasectomy: The buck's vas deferens were surgically ligated or severed. The buck's libido, climacterism, and ejaculation were normal, but there was no spermatozoa. This method is safe and requires surgery. The male cervus is easily fatigued after ejaculation and has reduced libido and less chance of replacing the buck. Bucks penis shift method: The penguin of the test situation will be moved to the left or right by surgery, so that the penis can not be inserted into the vagina of the female deer during mating, this method can keep the stag libido exuberant. The normal stag test method: Use a normal stag as a deer, but watch carefully. If you are careless or you can't catch it, you may have a chance to mate. When choosing the Bucks, choose a 1-year-old young stag with large testicles and a strong sexual desire. In the 21 heads of the female deer circle, 52 dedicated bucks are placed. As long as the female deer is in estrus, the male deer does not need to see mating, which can save the stag's strength. The estrus female deer is assigned to the selected stag house in time to mate with it, or the pre-selected stag is placed in the female deer circle and this mating is performed. The female deer is assigned to a separate group, and a tycoon deer is tried for the trial. Love Bucks to strengthen nutrition, feed more green feed and stimulate sexual desire feed, such as green onions, carrots, barley malt and so on. The third is the rectal touch method: the deer is delineated, and the hand gently touches the ovary through the rectal wall and judges the size and shape of the ovary and the morphological changes of the follicles above, so as to more accurately determine the period of development of the female deer and timely insemination and breeding. China Agricultural Network Editor
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