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Autumn cow breeding is timely
In autumn, the weather is cool, the pasture is abundant, and the feed is adequate. In addition, the cattle are in the retiring stage and the body condition is improved. The bull is energetic and the cow has a short estrus cycle and a long duration. This is the golden season for cattle breeding. Cow autumn breeding should grasp the following links. First, the cow fattening. The August-October period of the lunar calendar is the peak season for cows' autumn estrus. For fat cows of the appropriate age, fattening can be done. 40% of corn, 30% of barley, 20% of wheat, 10% of soya bean, mix and soak for 4-6 hours with fresh water, beaten, and add 8 to 10% of the total amount of feed to the beancake 5% bran, 1% salt, 3-5% bone meal, supplemented daily by two times a day to cattle feed, each time with soup and water to feed 7.5-10 kg. Prolong the grazing time, mow the grass and feed the cows, so that the cows will be estrus in the short term. Second, choose a good breed of bulls. If this is a cross (natural mating), every 20-30 adult cows should be selected to keep a good bull aged 3-8 years, special breeding. Bulls should be fed with green feeds and concentrates. Feeding animal feeds, such as eggs, fish meal, etc., should be added when the species is busy. At the same time, it is necessary to prevent indiscriminate use of inferior and inferior species. Third, grasp the timing of breeding. The buffalo's estrus cycle is 18-25 days, lasting 2-4 days. The estrus cycle of the cattle is 18-21 days for 1-2 days. The best time for mating female eggs is between 10 and 15 hours after the end of estrus to the end of estrus. The appropriate time for breeding is: 8 to 12 hours after the start of oestrus, and buffalo at about 20 hours after estrus. About 70% of mothers and females ovulate at night, so the timing of insemination should be about 7 o'clock on the same day that cow estrous characteristics begin to appear. In order to increase the conception rate, breeding can be repeated 8-12 hours after the first breeding. Fourth, artificial insemination. Artificial insemination can increase the conception rate of cows. When operating, insert the vas deferens flatly into the cervix to 5-7 cm, then slowly inject the semen. After the insemination is completed, slowly pull the vas deferens to prevent damage to cow vagina or semen. Fifth, aphrodisiac breeding. For non-estrus cows, heterosexually induced aphrodisiac or hormone drugs and traditional Chinese medicine aphrodisiacs can be used. Such as the use of ethylene female powder 25-30 mg, 40-60 mg of diphenol ethane, trihydrate 3-5 grams, the cow can be estrus after injection. Or use Chinese herbal motherwort 30 grams, pumpkin leaves 24 grams, 15 grams of safflower, Jianshui to cattle gavage; old jujube tree outer skin 0.5 kg, brown sugar 1 kg, add water, 3 kg, Jianshui to cattle sooner or later, one irrigation Even for 2 to 3 days, the cow can be estrus. Sixth, strengthen post-management. Do not exercise vigorously within 1-2 hours after mating, and try to avoid cows drinking or eating too much. Within 15 days after mating, feed should be added at night, and 1 to 1.5 kg of wheat bran or distiller's grains should be fed at the same time, and clean drinking water with a small amount of salt (25-28 g per day) should be given to facilitate implantation of fertilized eggs. During pregnancy, cows should be provided with protein-, vitamin-, and mineral-rich feeds to ensure healthy maternal and fetal growth. At the same time, special attention should be paid to preventing miscarriage, not feeding mildew, spoilage, toxic and excessively acidic or freezing irritating feeds to prevent enteritis, miscarriage, or producing weak and stillbirths; do not let pregnant cows be frightened to avoid nerves. Tension causes miscarriage of the uterus. In addition, mechanical abortions that occur when the cows collide, slip, whip, or top frame are prevented. Seven, drug miscarriage treatment. When vaccinated with lyophilized Brucella genus No. 5 attenuated bacterin, the progesterone can be intramuscularly injected with 0.5-1 g of progesterone once a day for one week.