One is supplemental sodium bicarbonate. The amount of sodium bicarbonate is generally 3.84% of the concentrate or 340 grams per cow per day. It is better to use with citric acid at the same time, but it should be noted that when using sodium bicarbonate, the amount of salt should be properly reduced.
The second is to add potassium chloride. Potassium chloride can be added to the drinking water of the cow or in the diet, and the amount is 60-80 grams per day per cow.
The third is vitamin supplements. During the summer, 0.04%-0.06% vitamin C can be added to the cow's feed. Vitamin C can inhibit the increase of body temperature, promote appetite, and increase resistance to disease. At the same time in the feed can add 3-5 times the normal amount of vitamin E, in order to reduce the risk of heat stress in dairy cows. Vitamin E prevents the oxidation and destruction of fat in dairy cows, prevents the production of oxides in the body, prevents the oxidation of other vitamins, and promotes the absorption of vitamin A and vitamin D in the intestine.
The fourth is to supplement the grass powder and increase wolfberry. With a hammer mill, the straw is crushed and grows to about 2 cm. If the screen bottom is too fine, it should be replaced with a large mesh sieve with an aperture of 1-2 cm. Wet the grass powder with warm water of 30°C-40°C, hand-knead into groups, loosen by hand, pile up into a 40-cm-thick square heap, and ferment the upper cover with sacks. The temperature in the heap reaches 40°C-50°C. Qu Xiang can be fed. Fermented grass powder should be diluted and cooled to prevent excessive temperature deterioration and deterioration. Calves cannot feed grass powder. Per 100 kg of fermented grass powder plus 1 kg of salt, 0.5 kg of bone meal, 30 kg of corn flour or bran, bean dregs and other nutritious grass powder can be added.
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