Cow Breeding "Two Multiple Methods"
(1) At the same time, “majority cows†have estrus at the same time: At present, the development of large-scale cattle is fast. To facilitate centralized management, it is advisable to have most cows estrus at the same time, and at the same time carry out mating and production. How can we achieve the above goals? The method is to “prepare a small piece of foam for each cow, soak it in 250 ml of medroxyprogesterone, and then place the foam in the cow’s cervix and place it for 14-16 days. Immediately after taking out the small pieces of plastic, Each cow is injected with 2,000 units of sex hormones for pregnant horses. After 2 to 3 days, the cows being treated are all able to ovulate. At this time, it is necessary to seize the opportunity to breed: First, on the day of heat and the next day Each insemination once, and second, the use of breeding bulls.(b) to make cows "produce mothers" method: in the production of cattle, in order to make cows prolific mothers, there are three methods: Serve on sunny days, match selection from 10 am to 2 pm on sunny days, let the cow face the sun station for 20 to 30 minutes, and then mating; second is a solution of transamination. Enter a small amount of 5% arginine in the estrous cow uterus Acid solution, then mating, can make cows produce females more than 80% of the rate; Third, feed calcium-containing feed, the cow feed two months before pregnancy, feed with high calcium content. The proportion of sodium and potassium is less than that of calcium and magnesium. When combined with sperm, it develops into a cow.