Raising the breeding rate of ewes is the key to gaining farm income. To improve the breeding rate of ewe can start from the following aspects:
The first is to select the male and female lambs of Damo lambs, which are hereditary and selected from the reserve sheep whose upper generation male and female rams are preferably one or more than two lambs. . These male and female mutton with good genetic basis are reserved for species use, which can fully exert their genetic potential in breeding and increase the chance of ewes having multiple births.
The second is adequate nutrition so that the breeding sheep have a healthy body condition and moderate sensation. The ram maintains a strong sexual desire. When sperm is bred, the ram has a large number of sperms, strong vigor, and strong fertilization ability. Strengthening ewes nutrition is to increase ewes breeding. Rate effective measures. The ewes are strong, the fetus is well developed, postpartum milk is sufficient, and the lamb is born with a large body and high survival rate. Therefore, the better the ewe's lynx, the greater the lamb’s weight and the higher the odds.
Third, two breedings are conducted. When the ewes are estrus, double mating or two inseminating sperm insemination can increase the rate of quasi-fetal births and increase the odds of producing twin lambs. The adoption of two breeding methods can often maintain fertilization in the genital tract of the ewe. The ability of sperm to exist increases the chance of fertilization. Commonly used methods: For the ewes that confirm estrus, insemination is performed once and after 12 hours and 24 hours. Generally, the insemination interval is 10 to 12 hours.
The fourth is to increase the percentage of young and middle-aged ewes in the flock. Young early-wort ewes and old and weak ewes have lower fecundity than young ewes. The ewes have the strongest fertility at the age of 3 to 4 years in their life, and the breeding period is generally 8 years. Therefore, in order to improve the overall level of the flock and rationally adjust the herd structure, the young ewes should be supplemented in a planned way, and the proportion of ewes aged 3 to 4 years in the flock should be appropriately increased to detect and eliminate old, weak or low fertility. Ewe.
The fifth is that the lambs are weaned early in time, and shortening the feeding time of the ewes can promote early estrus of the ewes and realize a year of prolificacy. Early weaning lambs need to artificially train the lambs' feeding power. When the lambs are 10-15 days old, they can feed fresh grasses, leaves or soft and digestible hay and leaves to stimulate the early formation of digestive tract digestive function and to lambs. Self-feeding direction transition.
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