Oils contain high calories, which is twice as hot as carbohydrates and protein. Adding childish or fat to the feed not only reduces dust, improves palatability, but also prolongs the passage of the chyme through the digestive tract, allows energy to be fully absorbed, improves feed utilization, and provides essential fatty acids and energy to pigs. Additional thermal effects to improve the nutritional value of the feed. According to reports, adding fat to the piglet diet can increase the daily increment by 10~14% and increase the feed compensation by 8~10%. Adding fat to the sow diet can increase the newborn piglet (primary weight) 10 ~12%, the survival rate of piglets during the feeding period increased by 1.5~2%.
Feed fat is divided into two major categories of animal and plant. In general, pigs have higher fat digestibility than animal fat in the northwest of plants, while lard in animal fats has higher digestibility than butter and sheep oil. Therefore, in the production often take animal fat and vegetable fat in a ratio of 1:0.5 ~ 1:1 lake and feeding to increase the digestibility of animal fat. The proportion of pig feed fat added is: 5~6% for piglets, 3~5% for growing and finishing pigs, and 6~7% for sows. When adding fat to pig feed, pay attention to the composition and nutritional balance of the diet. In addition, you must also pay attention to the following points:
First, because fat or oil is sticky, it is not easy to mix well in the daytime. The mixture should be expanded step by step. Do not add fat to a large amount of feed at a time. In winter, it should be heated to dissolve and cooled.
Second, fat or fat is prone to rancidity, especially in the summer, the feed should be mixed.
Third, the feed of fat or fat, due to high energy value, the feed intake of pigs will decrease, at this time should increase the content of other nutrients in the feed, especially the content of calcium and vitamin B12, as well as the content of amino acids.
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