Picking the best, improve fertility. In order to improve the reproductive performance of cows, selection and breeding should be strictly performed. Good physical appearance, good health, good temperament, good estrus symptoms, high conception rate during the first period, short first estrus time, and miscarriage rate should be selected. High quality cows with good reproduction and low breeding rates. Elimination of small-bodied cattle with poor body size, poor maternal habits, bad habits, ruthless temperament, excessive neurological sensitivity, unclear estrus symptoms, continuous sympathy more than 3 times, and diseases or disability, older age, poor performance, and poor reproductive performance . Through the improvement and selection of arrogance, gradually establish a herd with excellent reproductive performance.
Strengthen feeding management and do a good job of the cow's sensation. High or low nutrient levels will have different degrees of influence on the estrus, conception, embryo quality, reproductive system function, endocrine balance, and various complications during childbirth. Therefore, according to the different physiological characteristics of cows and the requirements of growth and production stages, scientific feeding is carried out, mainly based on roughage, and reasonable combination of concentrate feed, green feed and roughage, and strict control of body weight, so as to promote normal estrus and mating of cows and increase the rate of conception of cows.
Shorten empty time and increase reproduction rate. After juvenile cows have estrus, they correctly judge each stage of estrus, and select the most appropriate time for timely insemination and breeding. According to the reproductive physiology of cattle, it is ideal to produce 1 yak for 1 year, and it usually takes 30 to 40 days for the uterus to recover after cows' birth. Therefore, 40 days after childbirth is a critical period for cow reproduction, and management should be focused on, such as drug treatment after cow delivery, promote uterine recovery and ovarian reproductive function recovery, provide scientific breeding management conditions and create a suitable environment Wait. If the cow is found to have no estrus after 50 days after childbirth, the cow's health, nutritional status, ovaries and uterus should be promptly examined and treated to prevent cravings and infertility. Acupuncture can also be performed using drugs and other methods to increase the rate of acceptance of cows.
Strengthen the feeding and management of pregnant cows and increase the calving rate. Within two months of pregnancy, the embryos are in a free state in the uterus and the implantation process is gradually completed. The fetus is made of nutrients secreted by the endometrium and transferred to the placenta to absorb the nutrients of the mother. If the feeding level of pregnant cows is too low during this period, especially when the feed quality is poor, the lack of uterine milk secretion will affect the development of the embryo and cause embryonic death. In late-pregnancy cows, due to the rapid growth and development of the fetus, nutrition Substantial increase in demand for substances, so do not pay attention to strengthen feeding, lack of nutrients in the diet or incomplete, can easily lead to abortion and premature delivery of cows. If the feeding level is too high, it will cause cows to produce weak beaks, stillbirths or dystocia. In nutrients, the satisfaction of protein, mineral, and vitamin nutrients is particularly important. Feed and chilled drinking water should be prevented from spoiling, acidity, frost, and poisonous feeds. Management of pregnant cows should be reasonable and exercise should be adequate. Frightening, slipping, whipping, top racks, etc., to strengthen the protection of abortion experience, and if necessary, take anti-urethral drugs or progesterone injections and other drugs to protect the baby.
Scientific feeding management improves the survival rate of yak. Strengthening the feeding and management of pregnant cows, especially in the later stages of pregnancy, can help increase the calf's birth weight and survival rate. The newborn yak has no immunity. Only after eating colostrum, the immunoglobulin of colostrum is absorbed into the bloodstream through the intestine and the yak has immunity. Therefore, the time to eat colostrum after birth should be as early as possible. In order to reduce the calf's mortality and to cultivate healthy calves, the calf must be allowed to eat colostrum within two hours of postpartum and eat as much as possible. Seven to ten days after the yak is born, it is possible to train feed concentrates and quality roughage, promote the development of yak's gastrointestinal tract and improve its function, and prepare for weaning in advance. Avoid calves lying on the cold and wet ground, eating unclean foods to prevent the occurrence of diarrhea and other diseases, improve the survival rate of calves.
Strengthen feeding management and do a good job of the cow's sensation. High or low nutrient levels will have different degrees of influence on the estrus, conception, embryo quality, reproductive system function, endocrine balance, and various complications during childbirth. Therefore, according to the different physiological characteristics of cows and the requirements of growth and production stages, scientific feeding is carried out, mainly based on roughage, and reasonable combination of concentrate feed, green feed and roughage, and strict control of body weight, so as to promote normal estrus and mating of cows and increase the rate of conception of cows.
Shorten empty time and increase reproduction rate. After juvenile cows have estrus, they correctly judge each stage of estrus, and select the most appropriate time for timely insemination and breeding. According to the reproductive physiology of cattle, it is ideal to produce 1 yak for 1 year, and it usually takes 30 to 40 days for the uterus to recover after cows' birth. Therefore, 40 days after childbirth is a critical period for cow reproduction, and management should be focused on, such as drug treatment after cow delivery, promote uterine recovery and ovarian reproductive function recovery, provide scientific breeding management conditions and create a suitable environment Wait. If the cow is found to have no estrus after 50 days after childbirth, the cow's health, nutritional status, ovaries and uterus should be promptly examined and treated to prevent cravings and infertility. Acupuncture can also be performed using drugs and other methods to increase the rate of acceptance of cows.
Strengthen the feeding and management of pregnant cows and increase the calving rate. Within two months of pregnancy, the embryos are in a free state in the uterus and the implantation process is gradually completed. The fetus is made of nutrients secreted by the endometrium and transferred to the placenta to absorb the nutrients of the mother. If the feeding level of pregnant cows is too low during this period, especially when the feed quality is poor, the lack of uterine milk secretion will affect the development of the embryo and cause embryonic death. In late-pregnancy cows, due to the rapid growth and development of the fetus, nutrition Substantial increase in demand for substances, so do not pay attention to strengthen feeding, lack of nutrients in the diet or incomplete, can easily lead to abortion and premature delivery of cows. If the feeding level is too high, it will cause cows to produce weak beaks, stillbirths or dystocia. In nutrients, the satisfaction of protein, mineral, and vitamin nutrients is particularly important. Feed and chilled drinking water should be prevented from spoiling, acidity, frost, and poisonous feeds. Management of pregnant cows should be reasonable and exercise should be adequate. Frightening, slipping, whipping, top racks, etc., to strengthen the protection of abortion experience, and if necessary, take anti-urethral drugs or progesterone injections and other drugs to protect the baby.
Scientific feeding management improves the survival rate of yak. Strengthening the feeding and management of pregnant cows, especially in the later stages of pregnancy, can help increase the calf's birth weight and survival rate. The newborn yak has no immunity. Only after eating colostrum, the immunoglobulin of colostrum is absorbed into the bloodstream through the intestine and the yak has immunity. Therefore, the time to eat colostrum after birth should be as early as possible. In order to reduce the calf's mortality and to cultivate healthy calves, the calf must be allowed to eat colostrum within two hours of postpartum and eat as much as possible. Seven to ten days after the yak is born, it is possible to train feed concentrates and quality roughage, promote the development of yak's gastrointestinal tract and improve its function, and prepare for weaning in advance. Avoid calves lying on the cold and wet ground, eating unclean foods to prevent the occurrence of diarrhea and other diseases, improve the survival rate of calves.
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