Natural additive for improving anti-heat stress ability of whitmania pigra whitman

An anti-heat stress and additive technology, applied in the application, additional food elements, animal feed and other directions, can solve the problems such as no research reports on leech breeding, and achieve the effect of improving the immunity of leeches and improving economic benefits.

Inactive Publication Date: 2019-11-19
NANJING AGRICULTURAL UNIVERSITY
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Problems solved by technology

Studies have found that astragalus polysaccharides can enhance animal antioxidant capacity, anti-inflammatory and antibacterial, improve immune performance, improve production performance, and improve intestinal development. In recent years, it has been widely used in the breeding of fish, crustaceans and mollusks. , but there are few reports that it can improve the heat stress ability of animals, and there are no research reports on leech breeding.

Method used

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  • Natural additive for improving anti-heat stress ability of whitmania pigra whitman
  • Natural additive for improving anti-heat stress ability of whitmania pigra whitman
  • Natural additive for improving anti-heat stress ability of whitmania pigra whitman

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specific Embodiment 1

[0046]Select leeches with a body weight of 0.16±0.03g and place them in plastic bottles with a volume of 2L for 60 days, 10 leeches per bottle, for a total of 60 days, and keep the room temperature at 27±1°C. The implementation site is at the Institute of Traditional Chinese Medicine of Nanjing Agricultural University. It is added as an aqueous solution of astragalus polysaccharide, so that the concentration of astragalus polysaccharide in the culture water body is 0.07‰. Change the water once every 3 days, use tap water with aeration for 24 hours, the water change time is around 9:00 in the morning, 100% of the water is changed every time and the residual snails are removed. After changing the water, feed the fresh pear-shaped snails that have been temporarily raised in tap water for 3 days after cleaning. During the breeding process, dead leeches were found and cleaned up in time. Compared with the existing indoor high-density leech culture technology (density of 500,000 p...

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Abstract

The invention provides a natural additive for improving the anti-heat stress ability of whitmania pigra whitman.The invention aims to provide a breeding method for remarkbly enhancing the immunity ofthe whitmania pigra whitman, improving the anti-heat stress ability of the whitmania pigra whitman, promoting the growth of the whitmania pigra whitman, and increasing the economic benefit on the basis of existing whitmania pigra whitman breeding.Compared with an existing indoor high-density breeding technology for the whitmania pigra whitman, through the adoption of the natural additive, the survival rate of the whitmania pigra whitman is increased by about 40% maximally under heat stress, and the yield of the whitmania pigra whitman is increased by about 65% maximally at the same time.The economic benefit of whitmania pigra whitman breeding is increased without expanding the breeding area of the whitmania pigra whitman.

Description

[0001] 1. Technical field [0002] The invention relates to a natural additive for improving the heat stress resistance of leeches, which belongs to the field of medicinal animal breeding. [0003] 2. Background technology [0004] Leech (Whitmania pigra Whitman) is one of the basic animals of leeches, a traditional Chinese medicinal material. In recent years, a lot of research has been done on the biological characteristics, reproductive development, digestive physiology and respiratory physiology of leeches. On this basis, outdoor artificial breeding of leeches has been successful. Since the suitable growth temperature for leeches is around 25°C, during the breeding process, it was found that when the water temperature exceeds 30°C, the leeches will lose their appetite and grow slowly, especially when the sudden high temperature in summer will cause a large number of deaths, resulting in instability of artificial breeding production , seriously affecting its economic efficie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/40A23K10/30A23K20/163A23K50/80
CPCA23K10/30A23K20/163A23K50/80A01K61/40
Inventor 史红专郭巧生吴斌
Owner NANJING AGRICULTURAL UNIVERSITY
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