The digestive tract development of the pups is incomplete, and the secretion of endogenous digestive enzymes such as lipase and bile salts in the body is far from enough to digest and absorb the fat in the feed, resulting in wasted fat in the feed. Since the emulsifier can promote the digestion and absorption of fat, increase the feed conversion rate, and promote the growth of animals, it is necessary to add an exogenous emulsifier to the piglet diet to increase the digestibility of livestock fat.
     First, the type of emulsifier commonly used in feed production
     1. Types of emulsifiers
     Dozens of emulsifiers comply with national regulations and are approved for use in the market. Among them, there are five kinds of emulsifiers commonly used in animal feed, namely glycosides, phospholipids, bile salts, Span and spit. Tween and glycerol fatty acid esters. 3.1.1 Glycoside glycosides mainly include monoglycerides and sucrose esters. Monoglycerides have excellent organoleptic properties, and their color is yellow or ivory, mostly oily, and also fat or waxy. Sucrose ester is an abbreviation of sucrose fatty acid ester, and is a general term for a class of organic compounds synthesized from sucrose and multi-carbon (C8-C22) fat, and is a hydrophilic emulsifier. The combination of the two can make the emulsification effect of animal oil better.
      2, phospholipid
There are dozens of types of phospholipid emulsifiers, including: refined lecithin, hydrogenated phospholipids, complex phospholipids, modified phospholipids, crude phospholipids and decolorized phospholipids. Among the current animal feeds, lecithin is the first developed and widely used emulsifier.
      3. Bile salt
Bile acid is a sterol substance that is secreted by the gallbladder and bile into the intestine and is acidic during cholesterol metabolism in animals. The addition of cholate can not only achieve the fat in the lipase emulsified diet, but also enhance the activity of lipase, make up for the shortcomings of bile acid secretion in young animals, and improve the utilization rate of dietary oil. The rate promotes animal growth.
      4. Span and Tween
     Span and Tween are trade names for sorbitan fatty acid esters and polyoxyethylene sorbitan fatty acid esters, respectively. The plate is a lipophilic emulsifier and Tween is a hydrophilic emulsifier, both of which include monolaurate, monostearate, monopalmitate, monooleate and tristearate. . Both can be used alone or in combination, and a combination of the two can achieve a better emulsification effect.
      5.Glycerol monostearate (Glycerol fatty acid esters)
       Glycerol monostearate (Glycerol fatty acid esters) are glyceride-based products whose use is currently in development. The consumption of glyceride derivatives in Europe and the United States accounts for 20% of the total emulsifier consumption. Since the polyglycerol ester has a large range of HLB values, the emulsifying ability is strong and the demand is increased.
       Second, the application of emulsifier in piglets
       Piglets need a lot of energy during their growth, especially when they are young. Adding oil to the feed can greatly increase the energy level of the diet, meet the energy needs of the piglets, and increase the feed conversion rate. However, the digestive organs of young animals have not yet developed, the digestive system is not perfect, and the oil in the feed cannot be fully utilized to meet their own energy needs, resulting in the lack of energy of the young children and seriously affecting their growth. And development. The emulsifier of the invention is a feed additive capable of promoting fat digestion, has the advantages of emulsifying oil and fat, promoting digestion and absorption, and the like, and overcomes the disadvantage that the young pig cannot fully utilize the fat in the feed. Adding proper amount of emulsifier has good nutrition and emulsification effect on livestock and poultry feed, which can significantly improve the growth performance of livestock and poultry and improve the digestibility of dietary energy. The addition of emulsifiers to piglet diets can significantly increase feed fat and energy use, increase body weight, and promote rapid growth of piglets.
        Summary:
        An emulsifier is a feed additive that promotes fat digestion in animals. It can significantly improve the energy utilization of animal feed and is conducive to the rapid growth of animals. Emulsifiers with good nutrition and emulsification are used in livestock and poultry feeds, which have an important impact on the breeding effect of livestock and poultry. In the future, we should systematically study the effects of different emulsifiers, the factors affecting the effect of emulsifiers and the utilization technology of emulsifiers, and provide a basis for rational application.