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Feeding Cow Fat "Five Notes"
Feeding time should be appropriate. After the calving of the cows, the physical exertion is greater, and the feeding of the fat itself is a kind of stress. Therefore, the fat in the postpartum dairy cow's diet should not be added immediately, and can be added after 3 to 5 weeks of the cow production. Feeding fat-added diets will temporarily reduce cow milk production, but then its milk production will increase significantly. Especially during the hot season, adding fat in the milk diet during lactation can prolong the peak period of lactation. Increase milk production throughout the lactation period. However, by the end of lactation, the effect of feeding with fat-added diets is not significant. The composition of the diet should be reasonable. In order to give full play to the effects of adding fat diets, attention should be paid to feeding cows with high-quality hay, so that the crude fiber content of the diet reaches a certain level, which promotes the production of more acid in the rumen, thereby increasing milk production and milk fat percentage of the dairy cows. At the same time, it should also consider that the amount of ruminally degradable protein and rumen-bypass protein in the diet should be appropriately increased to maintain the level of milk protein, and the milk fat rate should not be reduced because of the increase in milk production. Feed additives. Feed 6 to 12 grams of niacin, 10 grams of rumen-protected methionine, or 20 to 30 grams of rumen-lysine daily, or supplement 20 to 30 grams of rumen-pass choline per day while feeding on a fat-fed diet. Milk yield, milk fat percentage and milk protein levels, reduction of metabolic diseases, improvement of reproductive performance, etc. all have significant synergistic effects. Distinguish applicable objects. For high- and middle-income dairy cows, the effect of increasing the yield of diets supplemented with fat is significant, but not for low-yielding dairy cows. If the average daily lactation of the herd is below 25.5 kg, it is not necessary to add fat to the diet; if the daily average lactation exceeds this value, fat can be added to the diet to increase the energy concentration of the diet. Its production needs. At the same time, the effect of feeding fat-added diets on dairy cows with a fat percentage of less than 3.5% is better. If the dairy fat percentage of dairy cows is higher than this, the effect of adding is not obvious. Add fat step by step. Both the use and the stop of fat in the diet require a gradual transition to ensure that the cows gradually adjust the feed intake to maintain the balance of microbial flora in the rumen. In addition, gradually increasing the amount of fat can also avoid the problem of poor palatability of the diet. In production, generally 3 to 4 weeks are used to make the amount of fat added to the full amount. In short, when the fat is added to the dairy cow's diet, only the dairy cow's physiological characteristics, production levels, and feeding and management factors are fully taken into account in order to further tap the cow's milk production potential and obtain maximum economic benefits.