First, the cause of death analysis 1, due to dystocia caused by the calf death due to cow delivery difficulties or artificial access to assisted production will cause some of the diseases of the newborn calf, such as inhalation of amniotic fluid caused by asphyxiation or dead skin or foreign body pneumonia; limb injury , dislocation and so on. The main reason for this situation was the poor responsibility of the consignee and the lack of technology. The recent staff adjustment of the cattle farm was carried out by the mating staff who worked part-time, often observing the delivery of cows in time, causing the cow’s amniotic fluid to rupture or cause injury. 2, due to improper care caused calf death Newborn calf was born, due to improper care, prone to a variety of diseases, such as colds, pneumonia, constipation, diarrhea, omphalitis, urachal fistula and sprained joints, bruises, etc. Diseases can easily cause calves to die. Individual calves that do not die will also be left with sequelae and be forced to be eliminated. Because of inappropriate nursing, calves are frozen to death and stuck. 3. Cow calf death due to failure of pre-feeding and management of cows Pregnant cows due to small sports ground and lack of exercise, coupled with poor feeding environment, limited drinking water, unscientific feed nutrient easily cause dystocia or cow post-partum body weakness, postpartum diarrhea, It often leads to calf death. 4. Calves caused by old and sick cows Deaths of sick and old weak and sick cows are debilitated, production performance is degraded, and even the productive capacity has been lost. Some prenatal breasts have swollen and sclerotic pus, and there is no milk after delivery. These cows If the feeding and management can not keep up after conception, it is easy to cause the phenomenon of stillbirth or dystocia. The natural survival rate of calves produced is not high. 5, due to improper feeding caused calf death New calves grow fast, strong metabolic function, with the weight gain of calves, the growth and development of nutrients needed to gradually increase, if the lack of feeding milk or opening material nutrition is easy Malnutrition causes slow growth, poor physical fitness, poor adaptability to the environment, weak resistance to disease, and eventually death. In addition, if calves are fed at irregular times, the milk temperature will fluctuate easily. Diarrhea, intestinal fistulas, intussusception and other diseases; unsanitary disinfection also makes it easy for yaks to develop diseases such as E. coli and coccidia, which can cause calf death. Second, preventive measures 1, to strengthen the cow's feeding management and disease prevention lactating cattle in normal dry milk has been more than 300 days of lactation, plus 7 months of pregnancy, nutrition metabolism has been in a negative balance, so the cows in childbirth Before the 60-day dry period should be guaranteed in order to facilitate the rest and regeneration of the mammary gland, to meet the fetal development needs and restore the physical strength of the cows; this is related to the management problem of breeding work, often due to poor grasping cattle farms, affect the conception Then affect the normal dry milk, resulting in a vicious cycle of yak malnutrition; In addition, the dry milk period to limit feed overage silage and energy feed, from less to more properly increase the fine material, concentrate nutrition formula should be scientific and comprehensive to prevent breast edema Pay attention to calcium and phosphorus balance and proper supplement of sodium chloride to prevent post-production paralysis and pica, and eliminate old and sick cows as soon as possible. In short, only the improvement of feeding and management, ensure the balance of nutrition and supply, and ensure the health of the cow can make the health of the newborn calf. 2. Science and timely access to midwifery, to ensure that mother and child safe confinement workers should strengthen the observation of the cows before giving birth. There are signs that the delivery should be sent to the delivery room to be produced, and the preparatory work for midwifery should be fully performed to prevent childbirth from knowing what to do. The delivery room should be covered with soft mat grass, the environment should be spacious and quiet; the cows enter the delivery room to be produced should pay close attention to amniotic fluid break water time, then when the production is first used 0.2% potassium permanganate solution to wash the genitals, the midwife to Cut and polish nails to prevent scratching of the cow's birth canal and infected bacteria. If you have trouble producing and have no experience in midwifery, you should hurry to help a veterinarian or experienced person. After birth, you should quickly put mucus and amniotic fluid around your nose and mouth. Wipe up or down the yak to allow the amniotic fluid to flow out and avoid inhalation of the lungs. Move the yak into the yak cage gently to prevent injury to the yak. ​​Disinfect the umbilicus and disinfect it with iodine to prevent inflammation and tetanus. 3, carefully feeding dry cows, increase the exercise on dry cows should be carefully taken care of, carefully feeding, breeding density should be appropriate, conditional cattle farm let free range, the maintenance of cattle farms in fine weather should be more cattle Going out on the playground to increase the amount of exercise can not drive the cows to violence to prevent miscarriage, the cow bed ground should be non-slip, to prevent the cow from falling; in addition, must not be fed rotten feed.
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