One, selenium
It is a component of glutathione peroxidase in cells throughout the body of the animal. It prevents the accumulation of lipid peroxidation in the body and protects the cell membrane and mitochondria; it is necessary for the conversion of methionine to cysteine. The element, synergistic with vitamin E, acts as an antioxidant in animals, promotes the absorption and storage of vitamin E, participates in amino acid metabolism in the body, plays an important role in protecting the body's ability to stabilize the immune system, and can protect the myocardium. Sheep's normal growth and fertility. Deficiency of selenium can cause liver necrosis, myocardial degeneration and pancreatic atrophy, so that young sheep appear nutritive muscle atrophy, white muscle disease occurs, the most common and most serious lamb. For adult sheep, it is manifested as reproductive dysfunction, reduced fertility, and severe weight loss. In areas such as Northeast China, Inner Mongolia, Shandong and Hebei provinces, there is a large area of ​​selenium-deficient areas, and attention should be paid to selenium supplementation.
Second, cobalt
Cobalt deficiency will lead to a decrease in rumen bacterial activity, inhibit the microbial synthesis of B vitamins and vitamin K, reduce the digestion and absorption of vitamin A, D and E in feed, and affect the reproductive performance of ewes. In the absence, cobalt oxide or cobalt salts should be added to the sheep's diet at a dose of 0.1 mg per day.
Third, copper
Copper is the main hematopoietic element. Copper deficiency can result in impeded iron absorption and anemia, manifested as growth disorders, bone deformities, and pale coats. Lamb sheep suffered from copper deficiency in some salinized reed meadows in China due to spinal cord and brain lesions and rocking disorders caused by movement disorders. The lake sheep caused rumen fibrosis by lack of copper. In the absence of copper, the effect of supplementing copper sulfate is best, because sheep's liver cells have a strong affinity for copper and are easy to accumulate, and care must be taken to prevent steel poisoning.
Four, zinc
Zinc is a component of many enzymes, proteins, and ribose in the sheep. The most obvious symptoms of deficiency are thickening of the epidermal cells, keratinization, loss of appetite, slow growth and reduced fertility, and wool tends to fall off. In some areas of Inner Mongolia, there has been a “big bulls-eye†disease in sheep due to zinc deficiency. The rams showed a decrease in ejaculatory volume and decreased semen quality. Subcutaneous injection of long-acting zinc or zinc supplementation can be used as a supplement.
Five, manganese and iodine
When the sheep lacks manganese, the estrus of the ewes is not obvious, and easy to abortion; abnormal sperm production in the ram. Iodine deficiency will reduce the basal metabolism of the sheep, the skin will be dry, the hair will be brittle and fall off, the weight will be reduced, and the quality of the semen of the ram will be poor. When iodine deficiency is supplemented with potassium iodide, calcium iodide or iodized salt.
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