Phosphorus is the most biologically active element of all minerals. First, it is involved with calcium in the composition of bones and tooth structure to ensure the structural integrity of bones and teeth; Second, it is involved in energy metabolism in the body, is an integral part of ATP and creatine phosphate; Third, it promotes the absorption of nutrients, phosphorus Promote the absorption of lipids and fat-soluble vitamins in the form of phospholipids. Fourth, ensure the integrity of biofilms. Phospholipids are indispensable components of cell membranes. Fifth, phosphorus is an important vital genetic material DNA, ItNA and structural components of some enzymes. , Participate in the process of counting many life activities, such as protein synthesis and animal product production. Therefore, phosphorus plays an important role in the production performance of dairy cows.
Although there is enough phosphorus in the feed, some diseases are likely to cause a large loss of phosphorus, resulting in imbalance of calcium and phosphorus. Therefore, the supplementation of phosphorus in certain cow diseases is critical. The main diseases involved are the following:
1 Cows can't afford syndrome
1.1 A cow's recumbent syndrome is a clinical syndrome characterized by "underground lying" that occurs when a lactating cow is approaching childbirth or childbirth. The most common high-yielding cows occur 2 to 3 days after calving. The incidence rate is between 2% and 12%. However, the mortality and elimination rate caused by this disease is quite high, accounting for 60% to 70% of the number of affected cattle.
1.2 After the onset of illness, after two calcium treatments, the symptoms of mental depression and other symptoms disappeared and the patient could not afford to remain lying. Diseased cows have normal appetite, body temperature, respiration, and normal heart rate. Some sick cows tried to stand, the fore limbs slammed into the ground, and the hind limbs were half-flexed or extended backwards. They were in "frog leg" posture and crawled. Due to long-term lying, mastitis often occurs concurrently, and acne ulcers develop around the ankle, foot joints, and hip joints. Eventually the sick cows die and are eliminated.
1.3 The clinical use of calcium preparations, phosphorus preparations, magnesium preparations and potassium preparations comprehensive treatment. 20% calcium gluconate 500-1000 ml, 20% potassium dihydrogen phosphate 300 ml, 10% potassium chloride 100-150 ml, add 2000 ml 5% glucose; 25% magnesium sulfate injection 100, 200 ml, disposable Intravenous injections were given once a day for 3 days. For injured cows with nerve injury and muscle stretching, vitamin B1 and B12 can be used to inject acupoints into the lumbar plexus.
2 Production 瘫痪
2.1 The production of cockroach, also known as milk fever, is a kind of hypocalcemia that occurs suddenly before and after the delivery of dairy cows. The disease often occurs in 4 to 5 times high-yield cattle and occurs most 24 hours after childbirth.
2.2 occurred in the postpartum 1.2 to 72 hours, the initial appetite, rumination stopped, standing instability, ataxia, head turned to the chest, body temperature dropped to 35% to 36 °C. Blood calcium was reduced to 3.6 to 7.0 mg, and serum phosphorus was reduced to 1.0 to 2.7 mg.
2.3 In addition to calcium therapy and breast ventilation therapy, phosphorus supplementation and magnesium supplementation should be performed in a timely manner. 20% sodium dihydrogen phosphate (200 ml), 15% magnesium sulfate (200 ml) can be injected intravenously, and rumen puncture should be performed when the rumen leaks.
3 Postpartum hemoglobinuria
3.1 Postpartum haemoglobinuria is a metabolic disease characterized by acute intravascular hemolysis, hemoglobinuria, anemia, and hypophosphatemia occurring in postpartum dairy cows. Occurred mainly in the postpartum 4 to 4 weeks, 3 to 6 births of high-yielding dairy cows, deep winter cold season occurs more.
3.2 Red urine is a prominent feature of the disease. In the first 1 to 3 days, urine gradually changed from light red to red, dark red to purple and tan, and gradually faded. Severe illness, depression, loss of appetite, anemia, mucous membranes pale and yellow, blood thin.
3.3 intravenous injection of 20% sodium dihydrogen phosphate 300 ~ 500 ml, 2 times a day, severe 2 to 3 days recovery.
4 Osteoporosis
4.1 Osteoporosis is a chronic metabolic osteoporosis in adult cattle caused by inadequate calcium, phosphorus, or vitamin levels in the diet or inappropriate calcium and phosphorus ratios. This disease occurs frequently in cows with high lactation levels and improper feeding and management.
4.2 The appetite of diseased cows is abnormal. They often feed on walls, cattle pens, mud, drinking urine or faeces; decrease in milk production and delaying estrus. Breeding cows stand on their backs, often lie on the floor, limbs or limbs limping; limb bones Swollen deformation, shift of the coccygeal bone, swelling of the rib cartilage and ribs, swelling of the hooves, deformation of the hooves, and prone to foot rot disease.
4.3 intravenous injection of 20% sodium dihydrogen phosphate 300 ~ 500 ml, once a day, once every 5 days. At the same time, intravenously inject 10% calcium chloride 300ml or 20% calcium gluconate 500ml once a day for 5 days. In addition, sick cattle are fed 250 grams of bone meal every day for 5 to 7 days as a course of treatment.
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