I. Synchronous estrus technology Synchronous estrus refers to the application of reproductive hormones. Ewes are treated according to a certain procedure so that the estrus can be collected within a predetermined time. The significance of this is that it can significantly save breeding time and shorten the ewes lambing interval. In the early stage, progesterone-based drugs were the main treatment. Currently, prostanoids are more commonly used. There are two preparations of prostaglandins, one is a synthetic prostaglandin analogue, known as cloprostenol, product code IC180996, its efficacy is 200 to 300 times that of natural products; the other is a natural product, use Pay attention to the difference. There are also two methods for simultaneous estrus treatment using prostaglandins. One is to give the ewes a natural injection of 6-8 mg of prostaglandin or 30-50 μg of artificial prostaglandin analogues within 72 hours after injection. 50% to 60% of the estrus of the ewes; the other method is to re-inject the same dose of the drug 11 days after the first injection, which can increase the proportion of estrus in the same period to more than 80%. Injecting prostaglandins can lead to miscarriage of pregnant ewes, so pay special attention. The principle of using prostaglandins is rather less and less, and the weight of the ewes should be reduced appropriately. Large-dose injection will produce short-term estrus, affecting the fertility rate of breeding. Second, the embryo transfer technology application of reproductive hormones such as pregnant horse serum gonadotropin (PMSG), pituitary cytokines (FSH), etc. on the supernumerary ewes (donors) for ovulation, so that the ovaries can be in an estrus cycle Elimination of more mature eggs than in the natural state and then timely mating of the treated ewes with either elite rams or their semen, and at the appropriate stage of embryo development, by surgical or non-surgical methods, from the fallopian tubes of the ewes or The embryos were removed from the uterus and transplanted in the same way to other ewes (recipients) synchronized to the donor cycle. This kind of offspring produced by the method of “borrowing and conceiving†and “borrowing and giving birth†has its genetic material completely derived from the parents who provide the embryos. Therefore, the production performance is not affected by the quality of the recipient ewes, and thus the performance can be selected. General ewes as receptors. At the same time, the number of embryos provided by the donor sheep and the potential generation of offspring are much greater than the number of offspring produced under natural conditions, which is of great significance for accelerating the pure propagation rate of the population. For example, in actual production, purebred Boer goats can be used as donors, and local goats can be used as acceptors to speed up the improvement of improved goats. There are two important indicators to measure the application level of embryo transfer technology: First, the number of embryos available for transplantation is obtained by the ewes subjected to superovulation. The current best level is 10 to 15 (up to 20 or more). The second is the rate of conception of the recipient sheep after transplantation. At present, the rate of fresh embryo transplantation is the highest, which is generally 60% to 70%. Frozen embryos and non-surgical transplantation are lower.
Other supplements
Feed Additives are divided into microbial feed additives and Chinese herbal feed additives. Among them, microbial feed additive is a kind of microbial products that replace or balance one or more strains in animal ecosystem. In a narrow sense, it is a kind of microbial products that can stimulate the reproduction and growth of beneficial bacteria while resisting the growth of harmful bacteria. Microbial feed additives containing a large amount of beneficial bacteria (active lactobacillus, bifidobacterium, bacillus), compound enzyme, chelating peptide, mildew remover, etc., as the inside of livestock and poultry feed, can rapid reproduction, on the one hand, in bacterial metabolites and gut endotoxin inhibits the growth of other harmful flora, on the other hand, it formed the normal microbial flora in the host, Synthesize the main vitamins for the host, provide nutrition and prevent the invasion of pathogenic bacteria.
There are many different feed additives in category. There are vitamins, amino acides, antibiotics, Trace elements,Buffer feed, flavor agents, Hormonal additives, herbal additives etc.
Feed Grade Cinnamon Powder,Bacillus Licheniformis Powder,Brewers Yeast For Feed Additive,Agricultural Chitosan Oligosaccharide
Allied Extracts Solutions , https://www.alliedadditives.com