Application of compound feed additive in preparation of feed for improving muscle texture of cultured large yellow croakers

A compound feed, large yellow croaker technology, applied in the application, animal feed, animal feed and other directions, can solve the problems of inability to satisfy consumers, decreased flavor, and high abdominal fat, and achieves improvement in muscle fiber diameter, mRNA level, and flavor substances. Effect

Active Publication Date: 2020-12-08
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

As a unique endemic species in my country, large yellow croaker is one of the traditional "four seafoods" in China and one of the main economic fish in my country's coastal waters. It is known as "China's national fish". However, large yellow croaker mariculture is developing rapidly An important problem faced in the process is the decline in the quality of farmed large yellow cro

Method used

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  • Application of compound feed additive in preparation of feed for improving muscle texture of cultured large yellow croakers
  • Application of compound feed additive in preparation of feed for improving muscle texture of cultured large yellow croakers
  • Application of compound feed additive in preparation of feed for improving muscle texture of cultured large yellow croakers

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preparation example Construction

[0053] Further, the preparation method of the above compound feed of the present application is also relatively convenient, and one of the preparation methods has the following steps:

[0054] The first step: pretreatment of raw materials, such as crushing and screening of fish meal and soybean meal.

[0055] Step 2: Weigh each raw material according to the mass ratio.

[0056] Step 3: Mix other solid raw materials except soybean lecithin, fish oil, and choline chloride. The mixing principle is as follows: mix uniformly and quantitatively step by step according to the proportion of raw materials, and then put the obtained mixture in the V-shaped Mix thoroughly in a mixer;

[0057] Step 4: Dissolve soybean lecithin in fish oil, and then continue to mix evenly with the well-mixed solid mixture.

[0058] Step 5: Dissolve choline chloride in water, then add the resulting aqueous solution into the above mixture (the amount of water is about 20% of the dry weight of the raw materi...

Embodiment 1

[0062] Before the formal breeding experiment, the large yellow croaker was temporarily raised in a seawater floating cage of 3.0×3.0×3.0m to adapt to the environment. Two weeks later, after starvation for 24 hours, the healthy and uniform large yellow croakers were selected and randomly divided into 6 groups (control group, experimental group 1, experimental group 2, experimental group 3, experimental group 4, and experimental group 5), and each group was divided into 6 groups. Each replicate was reared in a 1.5×1.5×2.0m floating cage, and each replicate had 30 tails. The control group was fed with basal feed, and the experimental groups 1, 2, 3, 4, and 5 added 900 mg / kg of compound feed additives on the basis of basal feed, and fed twice a day (05:00 and 17:30) . During the breeding period, the water temperature is 26.5-32.5°C, the salinity changes 32-36‰, the dissolved oxygen is greater than 6mg / L during the breeding period, and the breeding cycle is 45 days.

[0063] Acco...

Embodiment 2

[0085] It can be seen from Example 1 that the fat and protein content of the cultured large yellow croaker body in experimental groups 4 and 5 obviously increased. In order to clarify the relationship between the increase in fat and protein content and the meat quality of large yellow croaker, Example 2 was designed. The large yellow croakers with strong physique and uniform size were selected and randomly divided into 3 groups (control group, experimental group 4, and experimental group 5). Each group had 6 replicates, and they were respectively raised in floating cages of 1.5×1.5×2.0m. 30 tails per replicate. The control group was fed with basal feed, and the experimental groups 4 and 5 added 900 mg / kg of feed additives on the basis of basal feed, respectively, and fed twice a day (05:00 and 17:30). During the breeding period, the water temperature is 26.5-32.5°C, the salinity changes 32-36‰, the dissolved oxygen is greater than 6mg / L during the breeding period, and the bree...

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Abstract

The invention discloses application of a compound feed additive in preparation of feed for improving muscle texture of cultured large yellow croakers. Glycerol monolaurate, glycerol caprate and glycerol caprylate are used as feed additives and are added into the feed for culturing the large yellow croakers according to a ratio. According to the application disclosed by the invention, medium-chainfatty acid is applied through the feed additive, so that the mRNA level synthesized by muscle fibers in bodies of the cultured large yellow croakers can be effectively improved, and a metabolic pathway synthesized by protein and amino acid is up-regulated, and furthermore, the muscle texture and muscle fiber diameter of the large yellow croakers are improved. According to the application disclosedby the invention, the medium-chain fatty acid is applied through the feed additive, so that the content level of the amino acid, fatty acid and flavor substances in the muscles of the cultured largeyellow croakers can also be effectively improved, and furthermore, the flavor substances of the large yellow croakers are improved.

Description

technical field [0001] The application relates to the technical field of aquaculture, in particular to the application of a compound feed additive in the preparation of feed for aquaculture large yellow croaker. Background technique [0002] Medium-chain fatty acids (MCFAs) are saturated fatty acids with a carbon chain length of 8-12, including caprylic acid (C8:0), capric acid (C10:0) and lauric acid (C12:0), which are naturally present in animal milk fat and Coconut oil and palm kernel oil are fatty acids that are abundant in nature, easy to obtain, and easy to use. Medium-chain fatty acid monoglycerides have special chemical and physical properties. Compared with long-chain fatty acids, they have a lower melting point and are easier to dissolve; in animals, they can be directly transported to the liver for metabolism through the portal vein blood flow, achieving rapid supply. In addition, medium-chain fatty acid monoglycerides also have high-efficiency, broad-spectrum an...

Claims

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Application Information

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IPC IPC(8): A23K10/18A23K10/22A23K10/30A23K10/37A23K20/105A23K20/158A23K20/174A23K20/20A23K50/80
CPCA23K50/80A23K10/30A23K10/37A23K10/22A23K20/158A23K10/18A23K20/20A23K20/174A23K20/105Y02A40/818Y02P60/87
Inventor 冯凤琴王晶唐俊蒋慧琪
Owner ZHEJIANG UNIV
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