The most important measure is to properly adjust the feed method for dairy cows. The authors recommend a full-priced concentrate formula for milking 7,500 kilograms of high-yielding dairy cows: 35% soybean meal, 10% bran, 50% corn, 2% salt, 1% bone meal or calcium hydrogen phosphate, and 2% milk premix. For middle- or low-producing dairy cows, the ratio of soybean meal and bran can be adjusted according to this formula, or the full-rate concentrate feed can be reduced to reduce the daily consumption cost of concentrates. The specific measures are as follows: (1) Set the sink and the trough in the playground. Ensure that cows freely drink water and feed roughage during exercise. (2) Feed high-quality fresh pasture and straw in proportion, or feed 1 to 30 kg of fresh silage corn stover and 2.5 to 3 kg of dry straw daily to provide the fiber materials needed for rumen fermentation of dairy cows. (3) When dairy cows produce 10, 15, 20 and 30 kilograms of milk per day, using the above-mentioned concentrate formula, the daily feed quantity of full-priced concentrates is 4, 7, 9, 11 and 13 kilograms in order. For excellent high-yielding dairy cows, full-rate concentrate feeds can be withered as appropriate. (4) When reducing the daily feeding amount of concentrates, besides the stabilization of the amount of concentrate feed, each cow must feed 100 grams of salt, 50 grams of bone meal or calcium hydrogen phosphate, and 100 grams of milk premix. (5) Make up the brewer's grains. The brewer's grains contain high crude protein and a large amount of yeast, which can improve feed utilization efficiency and reduce feed costs. (Jiangsu Dafeng Dalong Animal Husbandry Hospital Lian Yaping)
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