Piglets have the characteristics of fast growth and strong metabolism, and have a high nutritional requirement for rations. With such high energy requirements, it is difficult to achieve a diet prepared mainly of corn and soybean cake. Therefore, it is necessary to add a certain percentage of oil. Experimental studies have confirmed that the addition of lipids to the diet of piglets improves the utilization of energy and protein, and the growth rate of piglets is significantly faster. Especially for piglets with a low birth weight, the effect is even more pronounced. In addition, fat can also reduce feed dust, reduce heat shock, improve feed flavor, improve feed appearance and reduce feed heating.
1ã€oil type
Grease feeds include animal and vegetable oils. Animal oils such as lard, butter, fish oil, etc., lard oil in the unsaturated fatty acid content is higher than the butter, fish oil is cheap but easy to rancid not easy to save. Vegetable oils such as rapeseed oil, cottonseed oil, corn oil, etc. In general, the best ratio of oil in the diet of piglets is: 10-15% in the early period and 5-6% in the later period. Practice has proved that the combination of vegetable oil and animal fat 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 the daily production, the lard oil in the braised meat shop and the lard as a by-product of the meat factory are the best cheap animal fats. The researchers mixed soy oil with short-chain saturated coconut oil in a 21-day-old weaned pig diet and found that piglets fed with soyoil and coconut oil had higher daily gains and feed rewards.
2, add methods
(1) Directly adding the oil to the feed in proportion to the fat, due to the large stickiness of the oil, it must be heated and melted before adding it, and then adding more powder, mixing evenly, gradually expanding the dilution, and finally the remaining diet. Mix other parts. Do not add fats and premixes and additives at the same time, to avoid the formation of small particles of grease and these additives affect the uniformity of feed. The oil may be added first, and then the additives may be added after mixing thoroughly, or the oil may be added after adding the additives and mixing thoroughly.
(2) After adding high oil, add the comminuted corn to a high oil feed containing 10% or 20% of oil, and then add the appropriate amount of corn and oil according to the required ratio.
(3) The spray can be used to spray the grease evenly onto the surface of the pellet feed using a sprayer. For conditional production of pellet feed, 30% of the added amount of fat can also be added to the pellet feed, and the other 70% is sprayed onto the surface of the pellets, thereby improving the palatability.
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