Cows must make up for trace elements in winter
At the time of severe winter season, providing sufficient trace elements for cows is an important condition for ensuring its healthy growth. Due to the long winter hours and short sunshine hours, the long-term lack of green fodder is not conducive to the intake and absorption of trace elements by dairy cows, and extra supplements must be made to meet animal nutrition requirements. Practice has shown that due to phosphorus deficiency, the proportion of calcium and phosphorus in dairy cows during growth is imbalanced, resulting in postpartum warts, cartilage disorders, and snoring disorders.
The cow feeds the full price feed at the end of pregnancy, and making up for the full trace elements and vitamins is an important part of ensuring the healthy growth of the fetus. At present, pregnant cows have entered the end of pregnancy. As the fetus grows, it is urgently needed to replenish large amounts of nutrients, including replenishing appropriate amounts of trace elements and vitamins. During this period, pregnant cows themselves consume nutrients, energy and trace elements. It is the largest and most critical period. Feeding at full price during this crucial period and making up for various nutrient elements can guarantee the production of high-quality colostrum and high-yield milk. Otherwise, there will be many adverse consequences.
The clinical manifestations of copper deficiency are weight loss and anemia. Cows have proteinuria after delivery. The amount of milk is decreased, the hair is faded and rough, yak grows slowly, often diarrhea, easy to fracture, the joints are swollen and stiff, the hoofs touch the ground, and the red blood cells and hemoglobin are decreased. . This disease is caused by the lack of copper in feed, or by excessive amounts of molybdenum, zinc, iron, lead, and calcium carbonate. Control methods: Mix copper sulfate by 0.5% of the amount of salt fed, and allow the cattle to feed and eat once every few days.
The clinical manifestations of iodine deficiency include goiter, slow growth, weight loss, anemia, loss of coat and loss of fecundity. Lack of iodine content in feed or drinking water, can be added to the diseased cattle feed an appropriate amount of iodized salt or 250 mg of potassium iodide in 1 kg of salt fed.
Symptoms of selenium deficiency include lack of energy, stiff limbs, rapid breathing, rapid heartbeat and irregular rhythms, general body muscle trembling, unstable standing, gait shaking, severe quadriplegia, anorexia, constipation or diarrhea, and late edema. death. Control method: Inject with 0.9% sodium selenite, intramuscular injection of 5-10ml for each calf, and dosage of calf, and repeated injection every 10-20 days.
Zinc-deficient cows have rough and thick skin, resembling dermatitis symptoms, and are mainly seen in nose, anus, vulva, tail tip, ears, hind limbs, and neck. This disease is mainly caused by the lack of zinc in the feed or excessive calcium in the feed. Zinc sulfate or zinc carbonate can be added to the feed by 0.02%. In severe cases, 2-4 milliliters of zinc sulfate can be injected per kilogram of body weight.
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