1. Vitamin
Adding a certain amount of vitamin C (150 mg/kg to 300 mg/kg) to the summer sow diet can alleviate hyperthermia. Vitamin E (30 mg / kg ~ 50 mg / kg) can enhance the body's immunity and antioxidant function, reduce the occurrence of sow mastitis, metritis; lack of can reduce the number of piglets weaned and piglets squat. Biotin (0.2 mg/kg) is widely involved in the metabolism of carbohydrates, fats and proteins, and biotin deficiency can lead to animal dermatitis or lobes. The high temperature environment can reduce the biosynthesis of bacteria in the intestinal tract of animals, so more biotin should be added to the feed. Vitamin D (150 IU / kg ~ 200 IU / kg) can regulate calcium and phosphorus metabolism in the body. Other essential vitamins such as B group, folic acid, pantothenic acid, choline, etc. should also be added in moderation, and should not be ignored.
2. Mineral element
Calcium and phosphorus are the main components of bone. Calcium and phosphorus ratios of appropriate calcium content of 0.8% to 1%, phosphorus of 0.7% to 0.8%, effective phosphorus of 0.45%, in order to improve the absorption of phytic acid phosphorus can be added to the diet phytase. Low calcium or phosphorus content may cause hind limb paralysis in lactating sows. High quality calcium and phosphorus additives should be selected for raw material selection. Trace element iron: Sows lose a lot of iron during breastfeeding, often showing a critical iron deficiency anemia, which not only affects health but also reduces feed utilization. The recommended dosage is 70 mg/kg. Manganese: Tests have shown that long-term feeding of 0.5 mg/kg diet in lactating sows can lead to abnormal bones, irregular estrus or estrus, and decreased lactation. Studies have shown that it is appropriate to add 5 mg/kg to 10 mg/kg of manganese to the lactating sow diet. Zinc deficiency also has an effect on the lactation performance of sows. Zinc can promote the development of hooves, bones and hair, reduce hoof disease, and improve the reproductive performance of sows and reduce the incidence of mastitis. The zinc requirement for lactating sows is affected by many factors. The zinc addition standards vary greatly from country to country, ranging from 40 mg/kg to 140 mg/kg, and the amount of zinc added in China is 60 mg/kg. suitable. Other minerals: Selenium is required to be 0.15 mg/kg and iodine is 0.14 mg/kg. In addition, the selected raw materials will affect the absorption of mineral elements by lactating sows. "Wang" uses organic raw materials such as organic iron, yeast chromium, and yeast selenium. Organic materials are easy to absorb and have high utilization rate, which can effectively increase the content of mineral elements in breast milk, and will not cause antagonism between minerals.
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