Raise the "triple rate" and technical points of dairy cows

Dairy cows' "triple rate" refers to the ratio of cows, pregnancy rate and survival rate of calving. Therefore, the effect of the application of frozen acid in dairy cows is directly reflected in the "third rate", which is also the key to the economic benefits of raising cattle. The normal breeding of dairy cows should be one year, but why can't the full-scale and full-scale application be achieved after the application of artificial frozen ingredients? Can't universally realize the standard of "three years and five heads of cows under cows"? The following points are based on the experience of dairy cows in Anda City, the hometown of dairy cows in China, and talk about the technical points for improving the "triple rate" of dairy cows. First, affect the cow's "triple rate" reasons 1 Dairy cow poor. The lyrical condition is the basis of the estrus of the cow, and the lyrical condition is directly related to the level of the allocation rate. Due to the low feeding and management level of dairy cows and the effects of lactation and other reasons, the body's nutrient cannot enter. Therefore, the secretion of the anterior pituitary gonadotropins (Lutein and follicle stimulating hormone) was inhibited, and the follicles on the hatching nests remained static for a long time. The corpus luteum persisted and the cows could not be estrused according to the normal law. According to the Anda State cows According to field survey statistics, the cows account for 50% of the estrus rate, the 60% of the estrus rate is 40.8%, and 70% of the quails are 92%. This proves that sensation is proportional to estrus. 2 cows lack tube VE. VE is a nutrient necessary to maintain the normal reproduction and health of dairy cows. When dairy cows increase their milk production, feed alone in the diet cannot meet the required active VE in cattle. Therefore, the lack of VE in cows is one of the important causes of early embryonic death. 3 suffering from obstetric diseases. There are many types of obstetric diseases in cows. Common diseases include endometritis, vaginitis, and cysts. The main reason for this is related to the improper handling of postpartum labor and the poor operation of artificial insemination techniques and semen contamination. 4 Yaks are breastfeeding for long periods. After the calving of the cows, the calf sucks for a long time, some for as long as a year. Due to the anti-proliferative effects of lactation, prolactin inhibits the secretion of gonadotropins, thus extending the fasting period. Cows usually start estrus 60 days after childbirth, and more than 100 days. Therefore, only 15% to 21% of natural estrus occurs in nursing cows. If you do not take early quarantine measures, you will have to live for one year. 5 The level of frozen dispensing technology is low. Some breeders did not have specialized training, but they were only partially theoretically knowledgeable. They were unable to grasp the identification of estrus cows because of the large scale of operations. Therefore, they sometimes resulted in mis-matching and missed allocation. In addition, some rectal grasp insemination is not skilled, insemination site is inaccurate, and the semen is lost to the urine. At the same time, some will not touch the ovary, will not diagnose early pregnancy, will not thawed semen, even if the cow estrus is normal it is difficult to register. Second, to improve the "third rate" of the technical points of the cows 1 to improve the ratio of dairy cows (1) to strengthen feeding and management. The main reason for the low rate of allocation is that cows are not estrus. To improve the rate of allocation, management must be strengthened. In summer, there are simple sheds, and in winter, there are insulated cow houses. To provide full-price nutritional feed and ensure that cows are full, we do everything possible to increase the cow’s nutrition to over 70%, promote the promotion of animal husbandry, and promote breeding. (2) After maternal cow cleaning the uterus. Postpartum cleansing of the uterus is to prevent postpartum placental infections and secondary postpartum uterine disease. Rinse 3-4 grams of terramycin powder, dilute with 0.9% normal saline 500-1000 ml, and inject into the uterus in batches until the rinse is clear. until. Therefore, it is proved that the limit of postpartum cleansing is one of the effective technical points for improving the postpartum acceptance rate of dairy cows. (3) timely treatment of obstetric diseases. Cows with obstetric diseases are difficult to register without timely treatment. Once the cause has been identified, a little treatment can restore fertility. Such as endometritis, vaginitis, after washing the uterus and antibiotics inject antibiotics, can be cured soon. Insufficient ovaries, indolent cows, were injected intranasally with 0.5% neostigmine 2ml/time, injected 3 times, 8 hours apart, and at the time of the second injection, 1000ml units of pregnant horse serum were injected at the same time. , can make more than 80% of cows ovarian function returned to normal. (4) Implement drug promotion. In order to increase the mating rate and shorten the mating period, it is not necessary to wait for the natural estrus of the cows, and it is necessary to apply pregnant horse serum or triad hormones to those cows that are lactating and have no long-term estrus. Practice has proved that the rate of drug promotion can reach 80% or more and the cow's ovarian function can return to normal. (5) Early isolation of yaks. It is necessary to create conditions to overcome difficulties and change the habit of long-term suckling of post-natal cows. Generally, after the cow is born, the yak is allowed to isolate the mother and the child seven days after the colostrum is fed. Artificial feeding of the calf can promote the cow to increase heat. 2. Improve the conception rate of cows (1) Be familiar with the law of estrus. Cows reach sexual maturity 12 months after birth and can participate in breeding after 18 months. Estrus is mostly concentrated in the months of June, July and August. The duration of estrus is 24-36 hours, with an average of 30 hours. The ovulation time is between 8 and 12 hours after the estrous cow “stabilizes the bar”. In the morning, it “strikes the stable bar” and loses sperm later. The next morning, it is lost again, or the evening “plays a stable bar”. The next morning insemination, once again in the evening of the day, only the estrus mastery of the cows and timing of breeding can guarantee that the cow's ovum and input sperm meet in the most vital time to create more opportunities for fertilization. . (2) master insemination site. Insemination generally takes the rectum to grasp the cervical insemination method. Therefore, by holding the cervix through the rectum, the semen can be accurately placed in the uterine horn portion of the follicle development directly by the insemination device, waiting for the sperm and the egg to meet. (3) Guaranteed insemination index. It is necessary to strictly grasp the technical operating procedures. Thaw in accordance with the exact temperature, each insemination is to ensure that more than 1 ml, more than zero vitality, more than 10 million effective sperm. For semen sent to the insemination point after thawing, it is necessary to reduce the temperature of the semen to be inseminated, tightly packed, and to prevent shocks. It is best to inseminate within 2 hours. The maximum length should not exceed 8 hours. (4) Do a good job of reviewing and matching. Some cows are due to some factor. The first estrus period has not been registered. This is also a normal phenomenon. Do not be afraid, let alone give up. It is important to register well-transfused cows, perform pregnancy diagnosis on time, discover and identify non-pregnant cows, identify causes, and reconstitute them in time. Only in this way can the rate of conception increase. (5) Increase the proportion of birth mothers. In accordance with Japanese Heimu Changchun's proposal that cows with bariatric acid hairdressing years can increase the proportion of birth mothers, professional and technical personnel such as Sun Dianbo of Anda Livestock Farm conducted an experimental exploration of the method from June 1986 to August 1987. Results Forty-six pregnant females were treated with azoic acid preparation, including 34 females and 73.9% of females, which was 47.8 times higher than the ratio of normal males and females (1:1). The difference was significant after X2 test. P0.01). Therefore, it has been proved through this practice that the use of arginine in the acidic environment of the uterus of estrous cows to suppress the viability of sperm containing Y chromosomes has a significant effect on raising the proportion of female fleas and should be popularized. 3, to improve the survival rate of calving (1) to promote cow calving during the day. The calving of cows is concentrated in April-May, and most of them are at night. The calves are suffering from diseases such as prolonged calving, birth canal infection, and reproductive tract injury. At the same time, it also caused the death of newborn calves, cowardly or cold embolism. Practice has shown that allowing cows to feed at night can promote daytime calving. At present, it is a common practice to allow cows in the last month of pregnancy to eat during the preparation period, which can cause more than 70% of cows to calve during the day. It is easy to observe calving during the day and is conducive to midwifery. It can avoid the influence of adverse factors in winter, reduce obstetric diseases, and increase the survival rate of calving. (2) Implement drug miscarriage. After intramuscular injection of VE 500 mg after normal cow mating or after insemination, 2 ml of a 0.5% solution of the new labor protection is injected into the cervix, which can effectively guarantee the conception and miscarriage. (3) After the cow is pregnant, it is necessary to strengthen feeding and management, exercise properly, dry milk in a timely manner, and generally hold it for about 2 months during dry milk to promote nutrient accumulation in the body, restore physical strength and breast function, fully recuperate, and ensure the production of calves. (4) When the cow is about to give birth, it is necessary to take care of it day and night. When the child is delivered, first wash it with warm water and Suer water, disinfect the genitals, dry the hindquarters with a damp cloth, and wait for the output quietly. Generally cows can take care of themselves. Output does not have to give birth. If the malposition is not correct, the artificial midwifery can be performed. The general midwifery is that when the fetal head exposes the genitals, the fetal membranes should be torn in time, and both hands should be inserted into the birth canal to insert the mother's finger into the mouth and pinch the lower jaw. The surgeon and the assistant should coordinate the movement, and follow the cow's strength and force. The direction should be to the bottom of the cow buttocks, until the fetus output. (5) Strengthen calf development. To promote "three distributions and seven-points breeding, care should be given to the postpartum yaks. Feeding milk and feeding them in accordance with the standard shall ensure normal development of the calves and change the past." It was born to be decent, long and long to go and go, and finally frozen. The phenomenon of matching with non-freezing" Chinese Agricultural Network Editor

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