Efficient breeding techniques for raising cashmere goats
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2, artificial insemination After collecting the semen of the ram, if you check the color of the cheese color, smell a slight smell, the amount of ejaculation 0.5-1 ml, the activity is higher than 0.6, more than moderate density, can be used to dilute insemination, The effective number of sperm per milliliter of dilution is not less than 700 million, usually 4-6 times, and the transport distance is within 10-15 kilometers of the ewes of the ewes, and beyond this distance, the ice should be placed in the wide-mouth thermos bottle. Keep the temperature at 0-5 °C. In short, the earlier dilution after sperm retrieval, the faster the insemination, the better the effect.
For ewes, two inseminations are usually used. After the first insemination, insemination is repeated once every 8 to 12 hours. When inseminating, the genital area of ​​the ewes is cleaned with warm soapy water, and the vas deferens is inserted. Deep cervix, virgin sheep for vaginal insemination, insemination should be doubled.
3. Efficient breeding and feeding is possible for efficient breeding of ewes, that is, two-year production or two-year and three-year production. Breeding is arranged within 40-60 days after delivery of the ewes. The first production was in February and the second production was in September. Artificial aphrodisiac and estrus technology were used in the first production and matched with lambs early weaning, ewes nutrition regulation, ram effect, and strengthening exercise.
Drug aphrodisiac: For ewes with prolonged corpus luteum or corpus luteum cyst disease, intramuscular injection of cloprostenol preparation 0.1mg, estrus rate of 90% over 1-5 days. After the ram trial, the first insemination 28 hours after estrus, insemination, intramuscular injection of No. 3 15μg / only, at intervals of 8 hours before insemination.
Induction of estrus: Cows are given fresh colostrum (or refrigerated for 2-3 days), antibiotics are added, and each is injected subcutaneously with 16-20 ml. After 5 days of injection, about 70% of the ewes are in heat, reaching 95% on the 15th day and the conception rate is 90%-100%. In addition, ram enticements can also be used. In the non-matching season, the rams and ewes were kept strictly isolated. Before the arrival of the mating season, the rams were suddenly introduced into the ewes. After 3 weeks, a considerable number of ewes had normal estrus cycles and higher ovulation rates. The mating season can be advanced and the conception rate can be increased.
To optimize the structure of the ewes group: Shepherds should establish a reasonable ewes group structure, and the ratio of young and old ewe should be scientific. The reasonable ewes are blue (1 year old), strong (1-6 years old), and old (6 years old) should be kept at 20%, 70% and 10%. Each year, from the bred sheep, the replacement breeding old sheep with high production performance are selected to maintain the balance or scale of the ewes.