Method for improving streptococcus iniae infection resisting capability of GIFT tilapia in high-density culture

Abstract

The invention discloses a method for improving the streptococcus iniae infection resisting capability of GIFT tilapia in high-density culture. The method comprises the steps of preparing of compound Chinese herbal medicine, adding, feeding and breeding management. Compared with the prior art, the method has the following advantages: (1) the immunological protection of the GIFT tilapia in high-density culture can be effectively improved, and the survival rate of GIFT tilapia infected with streptococcus iniae is improved; (2) the compound Chinese herbal medicine added in a feed belongs to environment-friendly feed additives, and has less negative effect on fish and water; (3) the blood and head-kidney immunological stress response can be effectively enhanced, and the liver stress injury is reduced; (4) the adopted technological steps of the method are simple, the Chinese herbal medicine is low, and easy to obtain and preserve, and can be well absorbed and utilized by a fish body, and excrement of the GIFT tilapia does not impact the water quality.

Description

technical field

[0001] The invention belongs to the field of aquaculture, relates to aquaculture management and feed feeding technology, in particular to a method for improving the resistance of high-density cultured Gifu tilapia to Streptococcus iniae infection. Background technique

[0002] Increasing the breeding density can not only improve the utilization rate of the unit water body, but also increase the total fish production and fisherman's farming income. High-density intensive farming has become one of the main means of fish farming.

[0003] As one of the main freshwater aquaculture species in the southern provinces of my country, Gifu tilapia plays an important role in increasing fishery production and increasing fishermen's income. High-density intensive farming has become the main trend of Gifu tilapia farming. Under high-density breeding, the breeding density of tilapia can reach 2500-4000 fish / mu, and the yield per mu is more than 2500 jin. However, in recen...

Examples

Embodiment 1

[0018] A method for improving the anti-infection of Streptococcus iniae in high-density cultured Gifu tilapia, comprising the following steps:

[0019] Step 1, compound Chinese herbal medicine preparation: by weight, 100g of compound Chinese herbal medicine contains Thymus 15g, Huajuhong 25g, Thyme 20g, Earthworm 15g, orange peel 25g;

[0020] The 2nd step, the addition of compound Chinese herbal medicine: by weight, add 0.2~0.5g, 0.8~1g of above-mentioned compound Chinese herbal medicine respectively in every 100g feed, be mixed with 0.2%~0.5%, 0.8%~1% two A compound Chinese herbal medicine addition group;

[0021] Step 3: Feeding compound Chinese herbal medicine: when the fish body size is 50-100g, add 0.2%-0.5% compound Chinese herbal medicine feed; when the fish body size is higher than 200g, add 0.8%-1% compound Chinese herbal medicine feed The compound Chinese herbal medicine is prepared by the following steps: freeze-drying, grinding and pulverizing, passing through a ...

Embodiment 2

[0031] A method for improving the anti-infection of Streptococcus iniae in high-density cultured Gifu tilapia, comprising the following steps:

[0032] Step 1, compound Chinese herbal medicine preparation: by weight, 100g of compound Chinese herbal medicine contains Thymus 15g, Huajuhong 25g, Thyme 20g, Earthworm 15g, orange peel 25g;

[0033] The 2nd step, the addition of compound Chinese herbal medicine: by weight, add above-mentioned prepared compound Chinese herbal medicine 0.4g, 0.9g respectively in every 100g feed, be mixed with two kinds of compound Chinese herbal medicine adding groups of 0.4%, 0.9%; Through freeze-drying , After grinding and crushing, pass through an 80-mesh sieve, and store at 4°C;

[0034] Step 3, feeding with compound Chinese herbal medicine: when the fish body size is 50-100g, add 0.4% compound Chinese herbal medicine feed; when the fish body size is higher than 200g, add 0.9% compound Chinese herbal medicine feed;

[0035] Step 4. Breeding manag...

technical field

[0001] The invention belongs to the field of aquaculture, relates to aquaculture management and feed feeding technology, in particular to a method for improving the resistance of high-density cultured Gifu tilapia to Streptococcus iniae infection. Background technique

[0002] Increasing the breeding density can not only improve the utilization rate of the unit water body, but also increase the total fish production and fisherman's farming income. High-density intensive farming has become one of the main means of fish farming.

[0003] As one of the main freshwater aquaculture species in the southern provinces of my country, Gifu tilapia plays an important role in increasing fishery production and increasing fishermen's income. High-density intensive farming has become the main trend of Gifu tilapia farming. Under high-density breeding, the breeding density of tilapia can reach 2500-4000 fish / mu, and the yield per mu is more than 2500 jin. However, in recen...

Examples

Embodiment 1

[0018] A method for improving the anti-infection of Streptococcus iniae in high-density cultured Gifu tilapia, comprising the following steps:

[0019] Step 1, compound Chinese herbal medicine preparation: by weight, 100g of compound Chinese herbal medicine contains Thymus 15g, Huajuhong 25g, Thyme 20g, Earthworm 15g, orange peel 25g;

[0020] The 2nd step, the addition of compound Chinese herbal medicine: by weight, add 0.2~0.5g, 0.8~1g of above-mentioned compound Chinese herbal medicine respectively in every 100g feed, be mixed with 0.2%~0.5%, 0.8%~1% two A compound Chinese herbal medicine addition group;

[0021] Step 3: Feeding compound Chinese herbal medicine: when the fish body size is 50-100g, add 0.2%-0.5% compound Chinese herbal medicine feed; when the fish body size is higher than 200g, add 0.8%-1% compound Chinese herbal medicine feed The compound Chinese herbal medicine is prepared by the following steps: freeze-drying, grinding and pulverizing, passing through a ...

Embodiment 2

[0031] A method for improving the anti-infection of Streptococcus iniae in high-density cultured Gifu tilapia, comprising the following steps:

[0032] Step 1, compound Chinese herbal medicine preparation: by weight, 100g of compound Chinese herbal medicine contains Thymus 15g, Huajuhong 25g, Thyme 20g, Earthworm 15g, orange peel 25g;

[0033] The 2nd step, the addition of compound Chinese herbal medicine: by weight, add above-mentioned prepared compound Chinese herbal medicine 0.4g, 0.9g respectively in every 100g feed, be mixed with two kinds of compound Chinese herbal medicine adding groups of 0.4%, 0.9%; Through freeze-drying , After grinding and crushing, pass through an 80-mesh sieve, and store at 4°C;

[0034] Step 3, feeding with compound Chinese herbal medicine: when the fish body size is 50-100g, add 0.4% compound Chinese herbal medicine feed; when the fish body size is higher than 200g, add 0.9% compound Chinese herbal medicine feed;

[0035] Step 4. Breeding manag...

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