3. Due to the imbalance of calcium and phosphorus and insufficient synthesis of vitamin D, the ability of dairy cows to absorb calcium will decrease, which will lead to obstacles in the utilization and release of bone calcium. Clinical studies have found that postpartum paralysis of dairy cows is caused by cerebral anemia and hypoxia, and hypoglycemia of calcium is a complication. Because the abdominal pressure of parturient cows will change greatly, the blood of abdominal organs will flow into the breast due to congestion. Insufficient blood supply to the brain is one cause of the disease, and the increase of blood in postpartum organs is another factor that leads to the disease of dairy cows. In addition, dairy cows lack trace elements and vitamins, and lack of exercise may lead to postpartum paralysis.
Second, symptoms. The onset time of dairy cows is generally the third day after delivery. At the early stage of the disease, dairy cows have symptoms such as loss of appetite, listlessness, cracked nose and glasses, weakened or disappeared rumination and stomach, decreased frequency and amount of defecation, frequent retention of feces, decreased reflex ability, laziness, alternate standing of limbs and rapid pulse. Cows can't stand in the late stage of the disease. Abnormal bending of the head or neck to one side, S-shaped bending of the midline of the back, weak eye reflex, dilated pupils, conjunctival congestion, weakened heart sounds, hypothermia, anal relaxation, gastrointestinal paralysis, respiratory weakness, and unconscious loss before death.
Third, the law of occurrence. Dairy cows suffer from postpartum paralysis, with meat 3 ~ 6 being the best and hyperbaric oxygen being the most. Most dairy cows suffer from postpartum paralysis within 72 hours. The higher the incidence of dairy cows, the more diseases. The incidence of the disease is usually 5% ~ 8%, which occurs all year round, usually in late summer and early spring, so it will spread. So in the process of breeding, prevention is the key. Dairy cows should pay attention to feeding management, adjust feed ratio and exercise properly before and after pregnancy. Fourth, the treatment method. After the diagnosis of sick cattle, it is necessary to supplement calcium to sick cattle, increase blood calcium concentration, improve physical strength and eliminate diseases. It can be treated with calcium gluconate and vitamin C.
Verb (abbreviation for verb) preventive measures. Dairy cows during pregnancy can cook with calcium and strengthen exercise later. One week before delivery, cows should be provided with concentrate and gravy feed, supplemented with vitamins and minerals, maintained a nutritional balance, exercised properly and basked in the sun. Before a pregnant cow gives birth to a calf, the breeder should take care of it at any time, but he can drink black sugar water every day to prevent postpartum paralysis. Cows drink warm salt water immediately after calving, and milk is squeezed out within 3 days after calving. Controlling small milk quantity and artificial milking can not keep the maternal blood calcium content at a normal level. Cows should be fed with high calcium feed after delivery to ensure the balance of calcium metabolism. Keep the blood cells and delivery room clean and hygienic, and keep the phone quiet.