The author investigated and counted the situation of several pig farms and found such a rule: the pigs with added fat and feed have good development and high disease resistance. Especially the pigs with lower birth weight are more effective. The basic reasons for improving the efficiency of oil and fat are: 1) the inherent high energy, easy absorption and easy to use characteristics of the oil; 2) the oil can provide a large amount of fatty acids, especially essential amino acids, for monogastric animals, and the energy content of the oil is high. And easy to be used by animals; 3) oil can improve the energy utilization of other components of the diet. It has been reported that the measured value of the metabolic energy of fats and oils is highest at the time of addition of 5%, and the metabolic energy value is decreased when 10% and 15% are added. Purpose and role of The pig has the characteristics of fast growth and rapid metabolism, and has high nutritional requirements for the diet. Such high energy requirements, if the corn and bean cake-based diet is difficult to achieve, therefore, it is necessary to add a certain proportion of oil. The experimental study confirmed that the energy and protein utilization rate was increased after the addition of oil and fat in the piglet diet, and the growth rate of the piglets was significantly accelerated. Especially for pigs with lower birth weight, the effect is more obvious. In addition, oil can also reduce feed dust, reduce heat stress, improve feed flavor, improve feed appearance, and reduce body heat. Grease type Oils and fats include animal and vegetable oils, animal oils such as lard, butter, fish oil, etc., whose metabolizable energy is more than 33.5MJ per kilogram. In animal fats, the content of unsaturated fatty acids in lard is higher than that of butter. Fish oil is cheap but Easy to rancid and difficult to preserve. Vegetable oils such as rapeseed oil, cottonseed oil, and corn oil have lower metabolic energy, and are also 29.5 MJ per kilogram. In general, the optimal ratio of fats and fats in the piglet diet is 10% to 15% in the early period and 5% to 6% in the later period. Practice has proved that the application of vegetable oil and animal oil is better than single application. It is better to mix vegetable oil and animal oil in a ratio of 1:1 or 2:1. In our daily production, the marinade of the braised meat store and the lard as a by-product of the meat factory are the best cheap animal fats. The researchers mixed soybean oil with short-chain saturated coconut oil in a 21-day-old weaned pig diet. The pigs fed soybean oil and coconut oil were found to have higher daily gain and feed compensation. Add amount The study found that 6% of animal fat was added to the weaned pig diet, and the daily gain was increased by 21.4% (P<0.01) within 5 weeks after weaning, and the feed conversion rate was significantly improved. The test results show that there is a copper-to-fat interaction effect on the daily weight gain of weaned pigs. Adding 2.5% to 5% of animal fat in high-copper (250 mg/kg) diet can increase the weight gain of piglets from 2 weeks to 4 weeks after weaning; adding fat to the diet of 5 mg of copper per kilogram does not work. . Add use method Direct addition: the oil is added into the feed evenly according to the proportion. Because the grease is sticky, it should be heated and melted first, then added with less powder, evenly mixed, gradually enlarged and diluted, and finally with other parts of the remaining diet. Mix well. Never add fats and premixes and additives at the same time to avoid the formation of small particles of grease and these additives to affect feed uniformity. You can add the oil first, add the additive after mixing well, or add the additive and mix well before adding the oil. After being formulated into high oil, it is added: the pulverized corn is formulated into a high oil feed containing 10% or 20% oil, and then added to the full amount according to the ratio of the required corn and oil. Spray addition: The spray can be used to evenly spray the grease onto the surface of the pellet feed. If the pelleted feed is conditionally produced, 30% of the added fat can be added to the pellet feed, and 70% can be sprayed onto the surface of the pellet to improve palatability. The problem that should be paid attention to when using Do not use deteriorated grease. Heat disinfection Grease should be tanning before use. Its role is to eliminate the bacteria and ensure the safety of the feed. The second is to facilitate mixing. Pay attention to the balance of nutrition in the diet After the oil is added, the other nutrients in the feed should be adjusted accordingly due to the increased energy level in the diet, especially to keep the protein energy ratio unchanged. Supplementary nutrient element First, a sufficient amount of choline or methionine should be added to prevent fatty liver from being caused by poor fat metabolism. The amount of choline added is 0.2%, and the amount of methionine added is 0.15%. Second, we must supplement trace elements such as zinc and selenium. Third, we must add enough vitamin E to improve the body's antioxidant capacity. Feeding and storage time should not be too long Excessive storage time or storage under high temperature conditions is prone to rancidity. In general, fat-containing feeds should not be stored for more than 7 days in summer and no more than 21 days in winter. Antioxidant should be added to the feed. Antioxidants can be added in an amount of 200 grams per ton to prevent rancidity. Basic Calculator With Pen,10-Digit Desk Calculators,Mute Portable Calculator,Foldable Desktop Calculator Guangdong Jishengke Industrial Co., Ltd. , https://www.suronart.com