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Shandong Qingfeng | What Problems Should We Pay Attention to in Dairy Cattle Breeding in Summer
Release time:
2021-07-30
Among the minerals needed by cows, phosphorus has a greater effect on reproduction. When its intake of phosphorus is insufficient, it will lead to delayed sexual maturity, and even stop the sexual cycle in severe cases. In addition, calcium is an essential mineral for fetal growth and can also prevent osteoporosis, postpartum paralysis and retention of the placenta in adult cows. In addition, there are some trace elements, such as copper, cobalt, manganese, iodine, etc., which have a certain effect on the health and reproduction of cows.
Nutrition plays a decisive role in the estrus, conception, pregnancy and survival of calves. When cows are fed diets containing insufficient energy for a long time, it will cause the sexual maturity and age of young cows to be delayed backward, and the effective reproductive time of their whole life will be significantly shortened. For adult cows, it will cause them to be unable to normal estrus, or show unobvious estrus symptoms, or even ovulate without estrus. If the cow is lack of energy during pregnancy, it is easy to cause abortion, labor weakness, stillbirth, low calf viability and so on.
Cows are fed diets lacking protein, which not only affects their estrus, conception and pregnancy, but also causes loss of appetite due to poor palatability of the diet, which reduces their weight and directly or indirectly affects their health and reproduction. If the level of crude protein in the diet is increasing, the concentration of urea nitrogen in plasma will increase, but the pregnancy rate will decrease. Therefore, high rumen non-degradable protein can be fed to supplement protein, so that the increase of urea nitrogen concentration in plasma can be avoided.
Cows needofMineralsin,The larger role of reproduction isPhosphorusWhen its phosphorus intake is insufficient, it will lead to delayed sexual maturity, and even cause the sexual cycle to stop in severe cases.In addition,Calcium is an essential mineral for fetal growth and can also prevent osteoporosis, postpartum paralysis and afterbirth retention in adult cows. In addition, there are some trace elements, such as copper, cobalt, manganese, iodine, etc., which have a certain effect on the health and reproduction of cows.Rocky Lick Brick
Estrus of cows generally lasts for a short time, basically about 18h, and about 25% of cows show estrus symptoms within 8h, and the number of estrus of cows from evening to early morning of the next day is more than that during the day. About 65% of cows show estrus and climb from 18 o'clock to 6 o'clock the next morning, especially between 20 o'clock in the evening and 3 o'clock in the morning of the next day, climbing activities occur more frequently. About 80% of cows begin ovulation 7~13h after the end of estrus, and the other 20% or so will ovulate early or delayed. In order to ensure that the detection rate of estrus cows can be improved, regular observation is taken at least in the morning, middle and evening of each day, the specific time is 7: 00 a.m., 13: 00 p.m. and 23: 00 p.m., and the observation time must be above 30min each time.
Breeding Disposable Gloves Coat
When cows are fertilizing, they should choose to use high-quality frozen semen, because the conception rate of cows is directly affected by semen quality. At the same time, there is a plan to choose the use of different excellent bull individual semen for insemination, to prevent inbreeding. The common method of cow breeding is rectal grasping method of inseminiation, which must strictly abide by the inseminition operation procedures to maintain good hygiene and prevent the operation from being too rough. Generally, insemination should be carried out 6~12h after the cow shows static reaction, which can obtain a higher conception rate. Usually cows show a static response in the morning and insemination in the evening; in the afternoon they show a static response and insemination in the morning of the following day. Special attention should be paid to the fact that the specific reference time for insemination is when the cow is in static estrus, not when the cow chases, climbs across other cows or refuses to climb across other cows. It is suitable to choose the uterine body of the cow, but because the cow has a smaller uterine body, it is necessary to prevent the input of semen into the uterine horn on the non-ovulatory side during the sperm transfusion process, resulting in the inability to conceive. The main point of the operation is that insemination can be carried out as soon as the vasectomy gun passes through the cervix. If you feel that the head of the vasectomy gun enters the cervix too deeply, you should retreat back to just past the cervix before insemination.
In production, an important cause of infertility in cows is uterine or ovarian diseases. Therefore, in the process of vaginal examination, insemination, midwifery and other operations, strict disinfection must be carried out, and the operation specifications must be observed to avoid reproductive tract infection and damage. In addition, cows mixed with certain specific infectious diseases can also seriously damage reproductive performance, such as bovine brucellosis, bovine rhinotracheitis, viral diarrhea, etc., can lead to infertility, infertility, abortion, fetal mummification, early embryonic death, stillbirth and death before and after birth. Therefore, in the production, for the individual cow with reproductive organ disease must take timely and effective treatment, at the same time strictly prevent the occurrence and spread of infectious diseases, to ensure that the cattle in a healthy state of normal reproduction.
Cows postpartum to strengthen nursing and feeding management, as soon as possible to promote their reproductive organs and physical recovery to the original state, but also to avoid the occurrence of diseases. The cow has just finished giving birth. Wash the vulva and its surroundings with warm soapy water or 0. 1% potassium permanganate solution and 1% ~ 2% Lasol solution, and dry them after cleaning. Replace the contaminated grass in the fence or enclosure in time to ensure that the enclosure is warm, dry and clean to avoid the intrusion of thieves. Pay attention to the observation of the discharge of the afterbirth and lochia of the cow. If the cow has more than 24 hours after delivery and more than 12 hours in summer, and the afterbirth has not been discharged, the afterbirth should be treated according to the retention of the afterbirth. If the cow still does not discharge lochia 15 days after delivery, it is necessary to find out the specific reason and take corresponding treatment in time.
Within 3 days after delivery, the cow is mainly fed with high-quality hay and a small amount of mixed concentrate, and drinks warm Yimu Ointment Wheat Bran Decoction once a day, which can not only promote the discharge of uterine lochia, but also supplement the water loss caused by calving. Cows are supplied with warm water every day for 1 week after delivery. In general, service cows can begin light servitude around 15 days after delivery and normal servitude beyond 30 days.
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