Application of angelica sinensis extract in preparation of anti-stress agent used for freshwater fish and preparation method of angelica sinensis extract

Abstract

The invention discloses application of an angelica sinensis extract in preparation of an anti-stress agent used for freshwater fish and a preparation method of the angelica sinensis extract. The angelica sinensis extract as the anti-stress agent used for the freshwater fish can improve the capacity of resisting high breeding density, copper sulfate and dipterex stress of the fish and reduce the stress reaction of the fish in a breeding environment, and therefore the morbidity and mortality of the fish are reduced; the breeding risk of aquaculturists is lowered, and the income of the aquaculturists is increased.

Description

technical field [0001] The invention belongs to the technical field of freshwater fish cultivation, and in particular relates to the application of an angelica extract in preparing an anti-stress agent for freshwater fish and a preparation method thereof. Background technique [0002] High-density intensification is an important feature of current aquaculture. High-density breeding increases the feeding amount, increases the breeding waste in the water body, and deteriorates the water quality. The performance is that the dissolved oxygen in the water is reduced, and the content of ammonia nitrogen and nitrite exceeds the standard. It has been reported that these factors will cause oxidative damage to fish, thereby reducing the digestion and absorption of feed by fish, reducing the growth and immune function of fish, and increasing the morbidity and mortality of fish. [0003] In the high-density breeding process, more harmful insects and fungi will breed, and a large amoun...

AI Technical Summary

Problems solved by technology

For fish poisoning caused by the use of trichlorfon or copper sulfate, farmers generally alleviate it by adding water or changing water, but adding water or changing water will increase the cost of breeding, make the breeding process more complicated, and also damage the breeding water environment ; and simply adding water or changing water in the breeding process can only relieve for a while, and cannot actually solve the problem

At the same time, in order to improve the breeding efficiency, farmers generally keep fish in a higher density range. However, with the change of seasons or different regions, the suitable breeding density of fish will also change. The resistance of fish to this change Capacities are also altered, leading to stress responses in fish and increased morbidity and mortality in farmed fish

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