First, improve the energy level
Dietary digestibility should be above 14 MJ/kg, and metabolic energy should be above 13 MJ/kg. Mainly choose high-quality corn, the water content must be controlled within 14%, and other indicators should reach the national second-class standard or above. Raw materials with high crude fiber content should be avoided. In addition, appropriate amount of fat (3% ~ 5%) or high-quality soybean phospholipids (4% ~ 6%) can be added to improve the energy level.
Second, increase the content of crude protein.
The crude protein content in the diet of lactating sows can reach more than 18%, so it is necessary to choose high-quality protein raw materials, and it is recommended not to use high-quality soybean meal (crude protein content is 44%), puffed soybean and imported fish meal.
Third, balance amino acids.
The content of lysine should be about 65438 0%, methionine 0.23%, cysteine 0.46% and threonine 0.5%. High lysine level and ideal protein are beneficial to the normal performance of lactating sows.
Fourth, the ratio of calcium to phosphorus is appropriate.
Calcium content should be 0.8% ~ 1%, phosphorus content should be 0.7% ~ 0.8%, and available phosphorus content should be 0.45%. In order to improve the absorption and utilization rate of phytate phosphorus, phytase can be added to the diet. Low calcium and phosphorus content or unbalanced proportion will lead to paralysis of hind legs of nursing sows.
Fifth, supplement the necessary vitamins.
Adding a certain amount of vitamin c( 150-200mg/kg) to sow's diet in summer can relieve high temperature stress:-carotene can increase lactation time and shorten estrus distance of female livestock; Vitamin e can enhance immunity and antioxidant function, and reduce the incidence of inflammation in sows and uterus; Reduce the number of weaned piglets and piglet diarrhea. Biotin is widely involved in the metabolism of carbohydrates, fats and protein. Lack of biotin can lead to dermatitis or hoof crack in animals. High temperature environment can reduce the synthesis of biotin by intestinal bacteria in animals, and vitamin D can regulate calcium and phosphorus metabolism in vivo. Other essential vitamins, such as B, folic acid, panic acid, choline, etc., should also be supplemented appropriately and cannot be ignored.
Recommended formula: corn 58.0%, bran 6.0%, soybean meal 15.0%, imported fish meal 5.0%, soybean lecithin 6.0%, corn germ meal 6.0% and premix 4.0%.