This is a superb mutton production technology, that is, twin-pregnant immune technology, also known as double-birth seedlings. It does not require professional and technical personnel to operate, does not require special equipment, and is not limited by the space of the site. Breeders can increase the lambing rate by subcutaneous immunization. The extent of lamb raising for Mian goats varies depending on their breed and nutritional level. The feeding conditions are good, and the increase is large; the breeds with high lambing rates are also increased. For single-term ewes, it has the potential to control the breeding of ewe's own twins, twins, and twins, and increase the rate of twin lambs. The higher the natural double lamb rate of ewes, the greater the increase in the rate of double lambs after immunization. The ewes with a 5% natural double-breasted rate can increase by more than 20 percentage points; the ewes themselves with a 10% natural double-breasted rate can increase by more than 30 percent; the mothers themselves have a 20% natural double-breasted rate. Herds can be increased by more than 40 percent; shepherd herds, which are 30% natural, can increase by more than 50 percent. Ewes that are twin breeds themselves can produce three lambs after immunization; ewes of three lamb breeds can produce four lambs. The lambs added are all that the ewes can conceive and nurse. The twin-pregnant immune technology is the only domestic manufacturer. Has won the first prize of scientific and technological progress in Gansu Province and the third prize of national scientific and technological progress. (1) Method of twin-immunity immunization: Two immunizations are performed on the ewes under separate (isolated) feeding and management of the male and female animals before mating. For the first time, 6 ml (42 days) before the start of breeding, 1 ml subcutaneous injections were injected subcutaneously on the otic side of the ear; a second booster immunization was given 3 weeks (21 days) later; the injection site and dose were the same for 2 times; Day) to be able to breed, artificial insemination or natural mating are appropriate. The ewes within two months of the breeding period all have immune effects and both have the possibility of twins. The amount of two injections per ewes was 2 ml. Note that each injection dose is controlled at 1 ml, although the super-double dose will double eggs but does not show estrus, the so-called silent ovulation, leading to missed allocation and empty arms. The day of the injection of double-birth seedlings does not immediately drive the ewes away. Regular grazing sheep is fine. (2) The sika deer was immunized with the same methods and effects as the sheep, except that the dose was 3 ml each time, and the total amount was 6 ml twice. (3) As a result of the accumulation of twin-immune immune memory, the results have been better for use year after year, and the double-latch rate has increased by more than 5 percentage points per year on the basis of an increase of 20 percentage points. (4) immunization of immature bulls, so that the testicular parenchyma weight gain of about 21%, sexual maturity, the daily sperm production increased by 30% -35%, semen quality is not affected. (5) 0-8 °C under dark conditions, the shelf life of 1 year, 20 °C below the shelf life of 6 months; 30 °C below the shelf life of 3 months, 35 °C storage period of 2
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