In autumn, the weather is cool, the fodder is abundant, and the fodder is abundant. In addition, the cattle are in the retiring stage. The bovine's body condition improves, the bull is energetic, and the cow has a short estrus cycle and a long duration. This is the golden season for cattle breeding. Therefore, farmers who raise cows should strengthen management and provide timely mating for the cows.
One, do not mistake
From August to October in the lunar calendar, it is the peak season for cows to fall estrus. Prior to the mating period, cows of the right age should have a moderate body condition, and neither over- or under-weighting are conducive to breeding. For lean cows, mix 40% corn, 30% barley, 20% wheat, and 10% soybean, soak for 4 hours to 6 hours with fresh water, beaten, and add 8% to 40% of the total amount of the above feed to the bean cake, 5% Bran, 1% salt, 3%-5% bone meal, supplemented with cattle twice a day in the morning and evening, 7.5 kg-10 kg each time with water; extend the grazing time, mow the grass and feed the cows Estrogen breeding in the short term. Only the cows have a good sensation, the estrus is normal, and fertilization and pregnancy are guaranteed.
Second, choose a good bull
The quality of bulls has a great influence on the quality of cattle. If it is a cross (natural mating), every 20-30 heads of mature cows should be selected to keep a good bull aged 3 years and up to 8 years old, and be kept by special personnel. Bulls should be fed with green feeds and concentrates. Feeding animal feeds, such as eggs, fish meal, etc., should also be added when the animals are busy. At the same time, it is necessary to prevent indiscriminate blending of near and inferior species.
Third, grasp the opportunity
The buffalo's estrus cycle is 18 days to 25 days, lasting 2 days to 4 days; the estrus cycle of the cattle is 18 days to 21 days, lasting 1 day to 2 days. Cows have reduced appetite and excitement after estrus. They like to approach the bulls and crawl with each other. They often do urination, but have less urine, and the pus is flushed, congested and slightly elevated, often accompanied by white, translucent mucus outflow. Cows also have a small amount of blood flowing from the vagina. At this point touch the cow's arm, oxtail Gao Qiao, quiet, two hind legs open to do the mating action, after the gradual recovery of appetite, loss of libido, genital swelling gradually subsided, mucus is small and thick (rectal examination, estrus is in the follicle maturation Period or ovulation period, at which time the cow is best suited to breed or inseminate. The mother's sirloin eggs are 10 hours to 15 hours after the end of estrus to the end of estrus, and the suitable time for breeding is 8 hours to 12 hours after the estrus begins. The buffalo is more suitable for breeding at about 20 hours after estrus.
Fourth, take repeated breeding
About 70% of mothers and oxes ovulate at night. According to this special law, cows inseminated at 7 o'clock in the evening on the day when the estrous characteristics began to appear. In order to increase the conception rate, a method of repeated breeding can also be adopted, that is, repeated breeding is repeated once for 8 hours to 12 hours after the first breeding. If the cow is bred at 7pm, it can be repeated at 5am-8am the next morning.
Fifth, artificial insemination
Artificial insemination is an important part of improving the conception rate of cows, especially the rectal grasp method is more effective. During operation, insert the vas deferens flatly into the cervix 5 cm to 7 cm, then slowly inject the semen. After the insemination, the vas deferens should be pulled out slowly to prevent damage to cow vagina or semen.
Six, aphrodisiac breeding
The opposite sex induces aphrodisiac, and the estrus bull chases non-estrus cows and heats the cows.
Seven, hormone drugs aphrodisiac
For estrus-producing cows, one of the following female hormones can be injected. The amount of ethylene female powder is 25 mg to 35 mg, diphenol ethane 40 mg to 60 mg, and triads 3 g to 5 g. After the cow can be estrus breeding.
Eight, traditional Chinese medicine
Motherwort 30 grams, pumpkin leaves 24 grams, 15 grams of safflower, Jianshui bovine gavage; old jujube tree split skin 0.5 kilograms, brown sugar 1 kilogram, add water 3 kilograms, Jianshui to cattle sooner or later gush, even Serve for 2 days to 3 days; cows can be estrus to breed.
Nine, strengthen the management after mating
Do not allow the cows to exercise vigorously within 1 hour to 2 hours after mating, and try to avoid cows drinking or eating too much. Within 15 days after the breeding, feed should be added at night, plus 1 kg - 1.5 kg of wheat bran or distiller's grains, etc., and clean drinking water with a small amount of salt added to facilitate implantation of fertilized eggs. The daily amount of salt is 25 grams to 28 grams. During pregnancy, the growth of the cow and the growth of the fetus, placenta, and uterus will require a large amount of nutrients, so pregnant cows should be supplied with protein, vitamins, and mineral-rich feed. If feed alone or feed supply is insufficient, cows and fetuses will suffer malnutrition, affect the normal growth and development of the mother and child, and even cause fetal death in severe cases. Special care should be taken to prevent miscarriage, not to feed molds, spoilage, poisonous, and excessively acidic feeds; to feed frozen, intensely irritating feeds to prevent enteritis, miscarriage, or production of weak and stillbirths; Frightened, to avoid nervous tension caused by uterine contraction abortion, frightened cows will also appear to increase adrenaline secretion, so that the blood vessels to contract, resulting in decreased blood flow to the placenta, easy to cause miscarriage; prevent cows from colliding, sliding Mechanical abortions that occur when whipped or topped off.
Ten, drug miscarriage treatment in the immune injection of lyophilized Brucella sheep type 5 attenuated vaccine, can be given to the pregnant cow intramuscular injection of progesterone 0.5 grams -1 gram, once a day for 1 week. Remember: Use dexamethasone with caution.
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