Fatty powder for aquatic animals as well as preparation method and application thereof

Abstract

The invention relates to fatty powder for aquatic animals as well as a preparation method and application thereof. The fatty powder for the aquatic animals is prepared from the following components bymass percent: 5 to 10 percent of arochidonic acid oil and a decomposition product thereof, 5 to 20 percent of medium chain triglyceride and a decomposition product thereof, 10 to 35 percent of kelp powder, 5 to 25 percent of phycocolloid prepared from three types of aquatic plants, and 15 to 40 percent of carriers. The fatty powder for the aquatic animals contains functional fatty acid which is not contained in conventional plant oil, while the fish oil or fish-oil-free feed is reduced, the special requirement of the aquatic animals for the fatty acid in the feed can be met, the fat metabolism of an aquatic animal body can also be promoted, the accumulation of the imbalanced fatty acid in the body can be reduced, the fatty liver can be reduced, the body health can be improved, and the culture benefit can be improved; and meanwhile, the fatty powder is prepared by adopting a vacuum post-spraying technology, an emulsion is sprayed onto the carrier by a vacuum post-spraying device, influence on the quality of the oxidative rancidity caused by the exposure of grease can be prevented, and the loss of the fat of the fatty powder in the granulation and feeding of the feed can also be prevented.

Description

technical field [0001] The invention relates to the technical field of feed, in particular to a fat powder and its preparation method and application, in particular to a fat powder for aquatic animals and its preparation method and application. Background technique [0002] my country is a big fishery country in the world, and the output of aquaculture increased from 2.33×10 in 1978. 7 t rose to 6.69×10 in 2015 7 t, increased by about 30 times in 37 years (data from "China Fishery Statistical Yearbook"). However, compared with livestock and poultry, the research on aquatic animal nutrition is relatively backward, and there are still some problems to be solved in the development of aquaculture industry. Aquatic animals have a low utilization rate of carbohydrates and a high requirement for fat. Especially for sea fish, due to their limited ability to synthesize long-chain polyunsaturated fatty acids (HUFA), their compound feed often needs to be supplemented with fish oil t...

AI Technical Summary

Problems solved by technology

However, the production of fish oil, especially seawater fish oil, is limited, unable to meet the needs of increasing aquaculture, and the price remains high, which limits the rapid development of aquaculture.

[0004] In order to reduce costs, there are also feed companies that use vegetable oil (generally soybean oil) instead of fish oil for aquaculture. For example, the emulsified fat powder feed for livestock and poultry breeding and aquaculture disclosed in CN106212857A is added with vegetable oil including emulsified soybean oil and emulsified corn oil. , emulsified palm oil, emulsified peanut oil, emulsified rapeseed oil or emulsified soybean lecithin oil; although adding vegetable oil can reduce costs, on the one hand, vegetable oil lacks the EFA of aquatic animals, and on the other hand, the fatty acid composition of vegetable oil is unbalanced, which will affect the fat metabolism of the body , increase fat accumulation in the body, which leads to problems such as high feed coefficient of farmed fish, serious fatty liver and low breeding efficiency

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