First, increase weight. Scientific experiments and production practices have proven that the greater the weight of female ewes, the higher the lambing rate, and the lower the body weight, the lower the lambing rate. The sheep ewes of the Romonian sheep in Lanzhou were less than 40 kg before bred, and the rate of estrus and fecundity was 68.57%. All of them produced single lambs. The rate of double lambs also increased rapidly with weight gain. The rate of conception was 40 kg-61 kg or more. 72.9 to 100%, the lambing rate is 100 to 150%. Therefore, in the ewes grazing period should do everything possible to increase the weight of the ewes, do not make the sheep have weight lower than the breeding standards of the ewes, is to improve the ewes breeding one of the effective measures. Second, feeding drugs. A mixture of bitter salt, wheat bran, and vinegar was fed twice a day before the estrus of each ewe and the formula was: 150 grams of bitter salt, 150 grams of wheat bran, and 50 grams of vinegar, which were mixed and moistened. It is appropriate to use this method to raise sheep's function: bitter salt and stomach, can increase the amount of ewes drinking water; wheat bran fire; vinegar Runzao, can strengthen the ewe's uterus acidity, increase the conception rate. "Ferocidine." Using "Fercofin" (also known as "Fukangning"), 2 ml of subcutaneous injections were made at the root of the ewe's ear, and each was performed 4 and 7 weeks before breeding to observe the induced ewe production. The effect of "Fei Keding" in inducing ewes to produce twin lambs is closely related to the ewes' physique. The physique is good, and the weight of the ewes is high, whereas the rate of double lambs is low. Ewes with a body weight of more than 45 kilograms can reach 25-30%. China Agricultural Network Editor
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