As a high-energy ingredient in livestock and poultry compound feed, fat has been used for more than 40 years since it was first applied in the production of poultry. Now it has been widely used in various countries of the world and has become a necessary additive for the preparation of high-density energy feeds. . Especially in the case of high-yield stages of young livestock and poultry, high-yielding livestock and poultry, and stress-reducing feed intake, the addition of fat has a significant effect on the promotion of animal production performance. In the lactation period of dairy cows, with the increase of lactation, the energy requirement also increases, but the increase of feed intake is relatively reduced. Especially in the pre-lactation period, the energy metabolism is generally negative balance, thus limiting the genetic potential. In production, in order to reduce or avoid negative balance and increase milk production, the energy concentration in the diet must be increased. However, the general practice is to increase concentrate feed and reduce roughage. However, this practice has led to changes in the type of rumen fermentation, reduced acetic acid, increased propionate, rapid decline in the pH of the rumen inhibited the activity of cellulolytic bacteria, resulting in reduced milk fat, but also easily lead to acidosis and other metabolic disorders in dairy cows. At present, reducing or avoiding the occurrence of negative balance will not only increase the energy concentration of the diet, but also will not reduce the milk fat rate. At the same time, it will not cause effective measures of acidosis, that is, on the premise of not changing the proportion of dietary fat, Add the right amount of fat to the food. According to reports by Clapperton et al., each cow added 364 grams of fat per day, milk production increased by 8%, milk fat percentage increased by 13% - 18%; Chalupa et al. (1991) added calcium palmitate to dairy cow diet daily. Dairy cows produce more than 2.4 kilograms of milk, and their milk fat percentage increases by 5%. However, milk protein content decreased by 0.16%; Schneider et al. (1988) divided 198 cows into two groups, one group fed 2.4% calcium palmitate and the other as a control group. After 110 days of tests, it was shown that feeding fat increased The milk production of cows was 9.48%, and the first fertility rate of mating was increased by 17.4%. At the same time, the addition of fat can reduce metabolic diseases such as ketoacidosis and fatty liver. Liu Qinghui et al. (1996) added 6% fish oil to the dairy grains of dairy cows, which can also significantly increase milk production. It shows that the addition of fat to dairy cows has a good effect on milk production. Gauze Dressing Pads,First Aid Gauze Pads,Absorbent Gauze Pads,Medical Absorbent Gauze Pads Henan Anbang Medical Supplies Co., Ltd. , https://www.anbangmedical.com