Selenium-enriched rainbow trout feed, and preparation method and application thereof

Abstract

The invention relates to the field of the aquaculture feed and in particular relates to a selenium-enriched rainbow trout feed, and a preparation method and an application thereof. The feed provided by the invention comprises Peru fish meal, swine blood meal, euphausiid shrimp meal, chicken meal, corn gluten meal, bean pulp, soybean protein isolate, vital gluten, pregelatinized starch, sleeve-fish oil, soya bean lecithin, glycine betaine, choline chloride, a mineral substance premix, a vitamin premix and yeast selenium. By feeding rainbow trout with the feed provided by the invention for 70 days, the total selenium content (wet weight) in muscles of the rainbow trout can reach 0.57-1.12mg / kg. The total selenium content (wet weight) of full fish can reach 0.58-1.06mg / kg. The rainbow trout bred by the feed is better in growth performance, feed nutrient gain rate and muscle quality. In addition, the selenium-enriched rainbow trout feed also has the functions of protecting liver and gallbladder and enhancing the oxidation resistance of rainbow trout and non-specific immune function.

Description

technical field [0001] The invention relates to the field of aquatic products, in particular to a selenium-enriched rainbow trout feed and a preparation method and application thereof. Background technique [0002] Selenium, since its discovery by Swedish chemist Berzelius in 1817, has been considered a poisonous element for a long time. It was not until 1957 that Schwarz and Foltz found that selenium was contained in the main component of the third factor that inhibited liver necrosis induced by eating in rats, and the identity of selenium as an essential trace element in animals was gradually recognized by people. Subsequently, a large number of studies have shown that selenium plays an important role in various normal body functions, and selenium deficiency will lead to many diseases such as Keshan disease, white muscle disease and cardiovascular disease. [0003] Selenium is widely distributed in the soil, can be absorbed and transformed by plants, and controls the sele...

AI Technical Summary

Problems solved by technology

As a high-quality food protein source, fish has relatively many studies on its selenium-enriched products, such as the selenium-enriched organic fish and its breeding method disclosed in the Chinese patent application number CN201010579798.1, and the application number is 201110392618.3 The selenium-enriched feed for cultivating selenium-enriched fish announced by Chinese patents and its preparation method and application, the selenium-enriched feed announced by these patents can all cultivate selenium-enriched fish, but various fish have different nutritional requirements, Therefore these patents are not necessarily applicable to the rainbow trout that the present invention pays close attention to

In addition, the Chinese patent application No. 201410532760.7 discloses a selenium-enriched cold-water fish feed. Although the feed provided by the invention can make the rainbow trout muscles achieve selenium enrichment in a short period of time, the selenium content of the feed is relatively high (5-20mg / kg), a large number of studies have shown that although it exists in the form of organic selenium, higher feed selenium content will still cause toxicity to rainbow trout, reduce the growth performance, feed utilization and immune function of rainbow trout, and reduce production. Did not comment on the health of the rainbow trout itself

Therefore, simply to achieve the purpose of enriching selenium, but ignoring the reduction in production caused by excessive selenium content in feed, the loss outweighs the gain.

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