A kind of blue crab feed and preparation method thereof

Abstract

The invention discloses a blue crab feed, which comprises the following raw materials: fish meal, shrimp shell meal, chicken meal, soybean meal, brewer's yeast, squid paste, enzymatic fish slurry, high-gluten flour, cassava starch, imported fish oil, soybean lecithin, calcium dihydrogen phosphate, composite multivitamin, composite mineral salt, brewer's yeast hydrolyzate, sodium humate and lignin sulfonate. The blue crab feed meets the nutritional needs of blue crabs, can ensure the improvement of growth speed and self-immunity in the process of blue crab breeding, and ensure the survival rate of blue crabs.

Description

Technical Field

[0001] The invention belongs to the technical field of compound feeds, and in particular relates to a blue crab feed and a preparation method thereof. Background Art

[0002] The scientific name of blue crab is Scylla serrata. It is one of the main marine aquaculture crabs in my country, and its aquaculture has achieved huge economic and social benefits. The formation and sustainable development of its industry must follow the model of healthy aquaculture. In addition to high-quality seedlings and a good water environment, high-quality feed is the key to the success of aquaculture. At present, the seedling cultivation technology of blue crab is very mature, but the research on blue crab feed is very scarce. At present, many farmers adopt the aquaculture method of feeding fresh frozen feed. This method is not only costly, but also causes the residual bait to rot in the water and damage the water quality, causing large-scale disease of blue crabs. Although some manufacturers on the market have begun to produce blue crab compound feed, the effect of use is not good. The main problem is that there is no reasonable feed designed according to the nutritional needs of blue crabs themselves. It is just modified on the basis of other original shrimp and crab feeds. The granular feed has poor water resistance, which leads to slow growth, difficulty in molting, low immunity, and even death of crabs after feeding. Therefore, in order to improve the growth rate and survival rate of blue crabs during farming, it is necessary to develop a compound feed that can meet the nutritional needs of blue crabs and has strong water resistance. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a mud crab feed and a preparation method thereof, the mud crab feed meets the nutritional needs of mud crabs, can ensure the growth rate and the improvement of self-immunity during mud crab breeding, and ensure the survival rate of mud crabs, and at the same time, the mud crab feed has good water resistance and conforms to the "holding feeding" habit of mud crabs.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions:

[0005] A blue crab feed comprises the following raw materials: fish meal, shrimp shell meal, chicken meal, soybean meal, brewer's yeast, squid paste, enzymatic fish slurry, high-gluten flour, cassava starch, imported fish oil, soybean lecithin, calcium dihydrogen phosphate, composite multivitamins, composite mineral salts, brewer's yeast hydrolyzate, sodium humate and lignin sulfonate.

[0006] Preferably, the blue crab feed comprises the following raw materials in parts by weight: imported fish meal: 10-30 parts; domestic fish meal: 10-30 parts; shrimp shell powder: 1-10 parts; chicken meal: 2-10 parts; fermented soybean meal: 3-15 parts; 46% soybean meal: 1-15 parts; brewer's yeast: 1-5 parts; squid paste: 1-5 parts; enzymatic fish slurry: 2-5 parts; high-gluten flour: 3-10 parts; cassava starch: 2-10 parts; imported fish oil: 1-3 parts; soybean lecithin: 1-3 parts; calcium dihydrogen phosphate: 0.5-5 parts; compound multivitamin: 0.1-1.5 parts; compound mineral salt: 1-3 parts; brewer's yeast hydrolyzate: 1-3 parts; sodium humate: 0.1-3 parts; lignin sulfonate: 0.1-3 parts. The 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; the imported fish meal refers to Japanese steam fish meal, the VBN of the imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash ... The domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, and it includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0007] Preferably, the blue crab feed comprises the following raw materials in parts by weight: imported fish meal: 10-20 parts; domestic fish meal: 20-30 parts; shrimp shell meal: 2-6 parts; chicken meal: 5-10 parts; fermented soybean meal: 4-15 parts; 46% soybean meal: 5-15 parts; brewer's yeast: 1-5 parts; squid paste: 1-5 parts; enzymatic fish slurry: 2-5 parts; high-gluten flour: 3-8 parts; cassava starch: 3-10 parts; imported fish oil: 1-3 parts; soybean lecithin: 1-3 parts; calcium dihydrogen phosphate: 0.5-3 parts; compound multivitamin: 0.2-0.8 parts; compound mineral salt: 1-3 parts; brewer's yeast hydrolyzate: 1-3 parts; sodium humate: 2-3 parts; lignin sulfonate: 1-3 parts.

[0008] Further preferably, the blue crab feed comprises the following raw materials in parts by weight: imported fish meal: 15 parts; domestic fish meal: 25 parts; shrimp shell meal: 4 parts; chicken meal: 8 parts; fermented soybean meal: 7 parts; 46% soybean meal: 10 parts; brewer's yeast: 3 parts; squid paste: 2 parts; enzymatic fish slurry: 3 parts; high-gluten flour: 5 parts; cassava starch: 6 parts; imported fish oil: 2.5 parts; soybean lecithin: 1.5 parts; monocalcium phosphate: 2.5 parts; compound multivitamin: 0.6 parts; compound mineral salt: 1.5 parts; brewer's yeast hydrolyzate: 2 parts; sodium humate: 2.4 parts; lignin sulfonate: 2 parts.

[0009] Preferably, each kilogram of the composite multivitamin includes the following ingredients: vitamin A: 3000-5000 IU, vitamin D3: 2000-3000 IU, vitamin E: 90-100 IU, vitamin K3: 15-30 mg, vitamin B1: 20-30 mg, vitamin B2: 50-60 mg, vitamin B6: 50-60 mg, vitamin B12: 0.2-0.5 mg, D-biotin: 3-5 mg, calcium pantothenate: 30-50 mg, folic acid: 3-7 mg, niacinamide: 70-100 mg, inositol: 230-250 mg, vitamin C monophosphate: 260-300 mg, and the rest is defatted rice bran.

[0010] Preferably, each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 0.9-2.0g, manganese sulfate: 30-80mg, copper sulfate pentahydrate: 10-20mg, magnesium sulfate heptahydrate: 1-5g, potassium iodide: 20-50mg, sodium selenite: 3-8mg, cobalt chloride: 6-10mg, zinc sulfate: 0.3-1.0mg, ferrous sulfate: 60-150mg, calcium iodate: 10-20mg, sodium selenite: 1-5mg, and the rest is zeolite powder.

[0011] Another object of the present invention is to provide a method for preparing the above-mentioned blue crab feed:

[0012] A method for preparing the blue crab feed as described above comprises the following steps:

[0013] (1) crushing the raw materials and mixing them into a mixed material;

[0014] (2) The mixed material obtained in step (1) is granulated after conditioning and drying.

[0015] Preferably, in step (1), the pulverizing includes primary pulverizing and ultrafine pulverizing, wherein the primary pulverizing is to pulverize the material through a 30-50 mesh sieve, and the ultrafine pulverizing is to pulverize the material through a 70-100 mesh sieve.

[0016] Preferably, in step (2), the conditioning is to add the material into a conditioner, introduce hot water vapor, maintain the material and space temperature at 80-110° C., and the conditioning time is 3-6 minutes.

[0017] Preferably, in step (2), the conditioning is to add the material into a conditioner, introduce hot water vapor, maintain the material and space temperature at 88° C., and the conditioning time is 5 minutes.

[0018] Preferably, in step (2), the granulation temperature is 75-100°C.

[0019] Preferably, in step (2), the granulation temperature is 85°C.

[0020] Preferably, the method for preparing the blue crab feed as described above comprises the following steps:

[0021] (1) First, weigh each component accurately;

[0022] (2) The larger particles are sieved through a 40-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0023] (3) passing the mixed material through an 80-mesh sieve for ultrafine grinding;

[0024] (4) Then add the material to the conditioner, introduce hot steam, maintain the material and space temperature at 80-110°C, and perform conditioning for 3-6 minutes;

[0025] (5) The conditioned materials are gradually added to a granulator for granulation at a temperature of 75-100°C. After drying and cooling, the granules are stored or packaged.

[0026] The beneficial effects of the present invention are:

[0027] (1) The mud crab feed system of the present invention can meet the comprehensive nutritional requirements of mud crab growth, increase the growth rate of mud crab, and shorten the breeding cycle of mud crab.

[0028] (2) The mud crab feed system of the present invention increases the water resistance of the pellets by adding high-gluten flour, cassava starch and lignin sulfonate components to ensure that the bait can be fully utilized, which meets the feeding habits of mud crabs that have a slow feeding speed and a long feeding time due to "holding food", and reduces water pollution caused by the loss of feed in the water body;

[0029] (3) The blue crab feed system of the present invention can synergistically enhance the immune function of blue crabs by adding brewer's yeast hydrolyzate and sodium humate, thereby ensuring the survival rate of adult crabs, and optimizes the dosage of calcium dihydrogen phosphate to accelerate molting, thereby ensuring the molting rate and survival rate of adult crabs. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with specific embodiments.

[0031] Embodiment 1:

[0032] A blue crab feed comprises the following raw materials in parts by weight: 10 parts of imported fish meal; 10 parts of domestic fish meal; 1 part of shrimp shell powder; 2 parts of chicken meal; 3 parts of fermented soybean meal; 1 part of 46% soybean meal; 1 part of brewer's yeast; 1 part of squid paste; 2 parts of enzymatic fish slurry; 3 parts of high-gluten flour; 2 parts of cassava starch; 1 part of imported fish oil; 1 part of soybean lecithin; 0.5 parts of monocalcium phosphate; 0.1 parts of compound multivitamins; 1 part of compound mineral salts; 1 part of brewer's yeast hydrolyzate; 0.1 parts of sodium humate; and 0.1 parts of lignin sulfonate.

[0033] Among them, 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; imported fish meal refers to Japanese grade steam fish meal, the VBN of imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash: 16.53%, salt: 4.65%, Lys: 5.12%, Met: 1.83%; domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, which includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0034] Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 3000IU, vitamin D3: 2000IU, vitamin E: 90IU, vitamin K3: 15mg, vitamin B1: 20mg, vitamin B2: 50mg, vitamin B6: 50mg, vitamin B12: 0.2mg, D-biotin: 3mg, calcium pantothenate: 30mg, folic acid: 3mg, niacinamide: 70mg, inositol: 230mg, vitamin C monophosphate: 260mg, and the rest is defatted rice bran.

[0035] Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 0.9g, manganese sulfate: 30mg, copper sulfate pentahydrate: 10mg, magnesium sulfate heptahydrate: 1g, potassium iodide: 20mg, sodium selenite: 3mg, cobalt chloride: 6mg, zinc sulfate: 0.3mg, ferrous sulfate: 60mg, calcium iodate: 10mg, sodium selenite: 1mg, and the rest is zeolite powder.

[0036] A method for preparing the blue crab feed as described above comprises the following steps:

[0037] (1) First, weigh each component accurately;

[0038] (2) The larger particles are sieved through a 30-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0039] (3) passing the mixed material through a 70-mesh sieve for ultrafine grinding;

[0040] (4) Then add the material to the conditioner, introduce hot steam, maintain the material and space temperature at 80°C, and perform conditioning for 3 minutes;

[0041] (5) The conditioned materials are gradually added to the granulator for granulation at a temperature of 75° C. The granules are dried and cooled before being stored or packaged.

[0042] Embodiment 2:

[0043] A blue crab feed comprises the following raw materials in parts by weight: 30 parts of imported fish meal; 30 parts of domestic fish meal; 10 parts of shrimp shell powder; 10 parts of chicken meal; 15 parts of fermented soybean meal; 15 parts of 46% soybean meal; 5 parts of brewer's yeast; 5 parts of squid paste; 5 parts of enzymatic fish slurry; 10 parts of high-gluten flour; 10 parts of cassava starch; 3 parts of imported fish oil; 3 parts of soybean lecithin; 5 parts of calcium dihydrogen phosphate; 1.5 parts of compound multivitamins; 3 parts of compound mineral salts; 3 parts of brewer's yeast hydrolyzate; 3 parts of sodium humate; and 3 parts of lignin sulfonate.

[0044] Among them, 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; imported fish meal refers to Japanese grade steam fish meal, the VBN of imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash: 16.53%, salt: 4.65%, Lys: 5.12%, Met: 1.83%; domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, which includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0045] Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 5000IU, vitamin D3: 3000IU, vitamin E: 100IU, vitamin K3: 30mg, vitamin B1: 30mg, vitamin B2: 60mg, vitamin B6: 60mg, vitamin B12: 0.5mg, D-biotin: 5mg, calcium pantothenate: 50mg, folic acid: 7mg, niacinamide: 100mg, inositol: 250mg, vitamin C monophosphate: 300mg, and the rest is defatted rice bran.

[0046] Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 2.0g, manganese sulfate: 80mg, copper sulfate pentahydrate: 20mg, magnesium sulfate heptahydrate: 5g, potassium iodide: 50mg, sodium selenite: 8mg, cobalt chloride: 10mg, zinc sulfate: 1.0mg, ferrous sulfate: 150mg, calcium iodate: 20mg, sodium selenite: 5mg, and the rest is zeolite powder.

[0047] A method for preparing the blue crab feed as described above comprises the following steps:

[0048] (1) First, weigh each component accurately;

[0049] (2) The larger particles are sieved through a 50-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0050] (3) passing the mixed material through a 100-mesh sieve for ultrafine grinding;

[0051] (4) Then add the material to the conditioner, introduce hot water vapor, maintain the material and space temperature at 110°C, and perform conditioning for 6 minutes;

[0052] (5) The conditioned materials are gradually added to a granulator for granulation at a temperature of 100° C. The granules are dried and cooled before being stored or packaged.

[0053] Embodiment 3:

[0054] A blue crab feed comprises the following raw materials in parts by weight: 10 parts of imported fish meal; 20 parts of domestic fish meal; 2 parts of shrimp shell powder; 5 parts of chicken meal; 4 parts of fermented soybean meal; 5 parts of 46% soybean meal; 1 part of brewer's yeast; 1 part of squid paste; 2 parts of enzymatic fish slurry; 3 parts of high-gluten flour; 3 parts of cassava starch; 1 part of imported fish oil; 1 part of soybean lecithin; 0.5 parts of monocalcium phosphate; 0.2 parts of compound multivitamins; 1 part of compound mineral salts; 1 part of brewer's yeast hydrolyzate; 2 parts of sodium humate; and 1 part of lignin sulfonate.

[0055] Among them, 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; imported fish meal refers to Japanese grade steam fish meal, the VBN of imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash: 16.53%, salt: 4.65%, Lys: 5.12%, Met: 1.83%; domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, which includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0056] Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 4000IU, vitamin D3: 2500IU, vitamin E: 95IU, vitamin K3: 20mg, vitamin B1: 25mg, vitamin B2: 55mg, vitamin B6: 55mg, vitamin B12: 0.3mg, D-biotin: 4mg, calcium pantothenate: 40mg, folic acid: 5mg, niacinamide: 80mg, inositol: 240mg, vitamin C monophosphate: 280mg, and the rest is defatted rice bran.

[0057] Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 1.5g, manganese sulfate: 50mg, copper sulfate pentahydrate: 15mg, magnesium sulfate heptahydrate: 3g, potassium iodide: 30mg, sodium selenite: 5mg, cobalt chloride: 8mg, zinc sulfate: 0.6mg, ferrous sulfate: 100mg, calcium iodate: 15mg, sodium selenite: 3mg, and the rest is zeolite powder.

[0058] A method for preparing the blue crab feed as described above comprises the following steps:

[0059] (1) First, weigh each component accurately;

[0060] (2) The larger particles are sieved through a 40-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0061] (3) passing the mixed material through an 80-mesh sieve for ultrafine grinding;

[0062] (4) Then add the material to the conditioner, introduce hot steam, maintain the material and space temperature at 88°C, and perform conditioning for 5 minutes;

[0063] (5) The conditioned materials are gradually added to the granulator for granulation at a temperature of 85° C. The granules are dried and cooled before being stored or packaged.

[0064] Embodiment 4:

[0065] A blue crab feed comprises the following raw materials in parts by weight: 20 parts of imported fish meal; 30 parts of domestic fish meal; 6 parts of shrimp shell powder; 10 parts of chicken meal; 15 parts of fermented soybean meal; 15 parts of 46% soybean meal; 5 parts of brewer's yeast; 5 parts of squid paste; 5 parts of enzymatic fish slurry; 8 parts of high-gluten flour; 10 parts of cassava starch; 3 parts of imported fish oil; 3 parts of soybean lecithin; 3 parts of calcium dihydrogen phosphate; 0.8 parts of compound multivitamins; 3 parts of compound mineral salts; 3 parts of brewer's yeast hydrolyzate; 3 parts of sodium humate; and 3 parts of lignin sulfonate.

[0066] Among them, 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; imported fish meal refers to Japanese grade steam fish meal, the VBN of imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash: 16.53%, salt: 4.65%, Lys: 5.12%, Met: 1.83%; domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, which includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0067] Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 4000IU, vitamin D3: 2500IU, vitamin E: 95IU, vitamin K3: 20mg, vitamin B1: 25mg, vitamin B2: 55mg, vitamin B6: 55mg, vitamin B12: 0.3mg, D-biotin: 4mg, calcium pantothenate: 40mg, folic acid: 5mg, niacinamide: 80mg, inositol: 240mg, vitamin C monophosphate: 280mg, and the rest is defatted rice bran.

[0068] Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 1.5g, manganese sulfate: 50mg, copper sulfate pentahydrate: 15mg, magnesium sulfate heptahydrate: 3g, potassium iodide: 30mg, sodium selenite: 5mg, cobalt chloride: 8mg, zinc sulfate: 0.6mg, ferrous sulfate: 100mg, calcium iodate: 15mg, sodium selenite: 3mg, and the rest is zeolite powder.

[0069] A method for preparing the blue crab feed as described above comprises the following steps:

[0070] (1) First, weigh each component accurately;

[0071] (2) The larger particles are sieved through a 40-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0072] (3) passing the mixed material through an 80-mesh sieve for ultrafine grinding;

[0073] (4) Then add the material to the conditioner, introduce hot steam, maintain the material and space temperature at 88°C, and perform conditioning for 5 minutes;

[0074] (5) The conditioned materials are gradually added to the granulator for granulation at a temperature of 85° C. The granules are dried and cooled before being stored or packaged.

[0075] Embodiment 5:

[0076] A blue crab feed comprises the following raw materials in parts by weight: 15 parts of imported fish meal; 25 parts of domestic fish meal; 4 parts of shrimp shell powder; 8 parts of chicken meal; 7 parts of fermented soybean meal; 10 parts of 46% soybean meal; 3 parts of brewer's yeast; 2 parts of squid paste; 3 parts of enzymatic fish slurry; 5 parts of high-gluten flour; 6 parts of cassava starch; 2.5 parts of imported fish oil; 1.5 parts of soybean lecithin; 2.5 parts of calcium dihydrogen phosphate; 0.6 parts of compound multivitamins; 1.5 parts of compound mineral salts; 2 parts of brewer's yeast hydrolyzate; 2.4 parts of sodium humate; and 2 parts of lignin sulfonate.

[0077] Among them, 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; imported fish meal refers to Japanese grade steam fish meal, the VBN of imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash: 16.53%, salt: 4.65%, Lys: 5.12%, Met: 1.83%; domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, which includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0078] Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 4000IU, vitamin D3: 2500IU, vitamin E: 95IU, vitamin K3: 20mg, vitamin B1: 25mg, vitamin B2: 55mg, vitamin B6: 55mg, vitamin B12: 0.3mg, D-biotin: 4mg, calcium pantothenate: 40mg, folic acid: 5mg, niacinamide: 80mg, inositol: 240mg, vitamin C monophosphate: 280mg, and the rest is defatted rice bran.

[0079] Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 1.5g, manganese sulfate: 50mg, copper sulfate pentahydrate: 15mg, magnesium sulfate heptahydrate: 3g, potassium iodide: 30mg, sodium selenite: 5mg, cobalt chloride: 8mg, zinc sulfate: 0.6mg, ferrous sulfate: 100mg, calcium iodate: 15mg, sodium selenite: 3mg, and the rest is zeolite powder.

[0080] A method for preparing the blue crab feed as described above comprises the following steps:

[0081] (1) First, weigh each component accurately;

[0082] (2) The larger particles are sieved through a 40-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0083] (3) passing the mixed material through an 80-mesh sieve for ultrafine grinding;

[0084] (4) Then add the material to the conditioner, introduce hot steam, maintain the material and space temperature at 88°C, and perform conditioning for 5 minutes;

[0085] (5) The conditioned materials are gradually added to the granulator for granulation at a temperature of 85° C. The granules are dried and cooled before being stored or packaged.

[0086] Comparative Example 1: (Compared with Example 5, without high-gluten flour)

[0087] A blue crab feed comprises the following raw materials in parts by weight: 15 parts of imported fish meal; 25 parts of domestic fish meal; 4 parts of shrimp shell powder; 8 parts of chicken meal; 7 parts of fermented soybean meal; 10 parts of 46% soybean meal; 3 parts of brewer's yeast; 2 parts of squid paste; 3 parts of enzymatic fish slurry; 6 parts of cassava starch; 2.5 parts of imported fish oil; 1.5 parts of soybean lecithin; 2.5 parts of calcium dihydrogen phosphate; 0.6 parts of compound multivitamins; 1.5 parts of compound mineral salts; 2 parts of brewer's yeast hydrolyzate; 2.4 parts of sodium humate; and 2 parts of lignin sulfonate.

[0088] Among them, 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; imported fish meal refers to Japanese grade steam fish meal, the VBN of imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash: 16.53%, salt: 4.65%, Lys: 5.12%, Met: 1.83%; domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, which includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0089] Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 4000IU, vitamin D3: 2500IU, vitamin E: 95IU, vitamin K3: 20mg, vitamin B1: 25mg, vitamin B2: 55mg, vitamin B6: 55mg, vitamin B12: 0.3mg, D-biotin: 4mg, calcium pantothenate: 40mg, folic acid: 5mg, niacinamide: 80mg, inositol: 240mg, vitamin C monophosphate: 280mg, and the rest is defatted rice bran.

[0090] Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 1.5g, manganese sulfate: 50mg, copper sulfate pentahydrate: 15mg, magnesium sulfate heptahydrate: 3g, potassium iodide: 30mg, sodium selenite: 5mg, cobalt chloride: 8mg, zinc sulfate: 0.6mg, ferrous sulfate: 100mg, calcium iodate: 15mg, sodium selenite: 3mg, and the rest is zeolite powder.

[0091] A method for preparing the blue crab feed as described above comprises the following steps:

[0092] (1) First, weigh each component accurately;

[0093] (2) The larger particles are sieved through a 40-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0094] (3) passing the mixed material through an 80-mesh sieve for ultrafine grinding;

[0095] (4) Then add the material to the conditioner, introduce hot steam, maintain the material and space temperature at 88°C, and perform conditioning for 5 minutes;

[0096] (5) The conditioned materials are gradually added to the granulator for granulation at a temperature of 85° C. The granules are dried and cooled before being stored or packaged.

[0097] Comparative Example 2: (Compared with Example 5, without cassava starch)

[0098] A blue crab feed comprises the following raw materials in parts by weight: 15 parts of imported fish meal; 25 parts of domestic fish meal; 4 parts of shrimp shell powder; 8 parts of chicken meal; 7 parts of fermented soybean meal; 10 parts of 46% soybean meal; 3 parts of brewer's yeast; 2 parts of cuttlefish paste; 3 parts of enzymatic fish slurry; 5 parts of high-gluten flour; 2.5 parts of imported fish oil; 1.5 parts of soybean lecithin; 2.5 parts of calcium dihydrogen phosphate; 0.6 parts of compound multivitamins; 1.5 parts of compound mineral salts; 2 parts of brewer's yeast hydrolyzate; 2.4 parts of sodium humate; and 2 parts of lignin sulfonate.

[0099] Among them, 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; imported fish meal refers to Japanese grade steam fish meal, the VBN of imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash: 16.53%, salt: 4.65%, Lys: 5.12%, Met: 1.83%; domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, which includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0100] Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 4000IU, vitamin D3: 2500IU, vitamin E: 95IU, vitamin K3: 20mg, vitamin B1: 25mg, vitamin B2: 55mg, vitamin B6: 55mg, vitamin B12: 0.3mg, D-biotin: 4mg, calcium pantothenate: 40mg, folic acid: 5mg, niacinamide: 80mg, inositol: 240mg, vitamin C monophosphate: 280mg, and the rest is defatted rice bran.

[0101] Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 1.5g, manganese sulfate: 50mg, copper sulfate pentahydrate: 15mg, magnesium sulfate heptahydrate: 3g, potassium iodide: 30mg, sodium selenite: 5mg, cobalt chloride: 8mg, zinc sulfate: 0.6mg, ferrous sulfate: 100mg, calcium iodate: 15mg, sodium selenite: 3mg, and the rest is zeolite powder.

[0102] A method for preparing the blue crab feed as described above comprises the following steps:

[0103] (1) First, weigh each component accurately;

[0104] (2) The larger particles are sieved through a 40-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0105] (3) passing the mixed material through an 80-mesh sieve for ultrafine grinding;

[0106] (4) Then add the material to the conditioner, introduce hot steam, maintain the material and space temperature at 88°C, and perform conditioning for 5 minutes;

[0107] (5) The conditioned materials are gradually added to the granulator for granulation at a temperature of 85° C. The granules are dried and cooled before being stored or packaged.

[0108] Comparative Example 3: (Compared with Example 5, without lignin sulfonate)

[0109] A blue crab feed comprises the following raw materials in parts by weight: 15 parts of imported fish meal; 25 parts of domestic fish meal; 4 parts of shrimp shell powder; 8 parts of chicken meal; 7 parts of fermented soybean meal; 10 parts of 46% soybean meal; 3 parts of brewer's yeast; 2 parts of squid paste; 3 parts of enzymatic fish slurry; 5 parts of high-gluten flour; 6 parts of cassava starch; 2.5 parts of imported fish oil; 1.5 parts of soybean lecithin; 2.5 parts of calcium dihydrogen phosphate; 0.6 parts of compound multivitamins; 1.5 parts of compound mineral salts; 2 parts of brewer's yeast hydrolyzate; and 2.4 parts of sodium humate.

[0110] Among them, 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; imported fish meal refers to Japanese grade steam fish meal, the VBN of imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash: 16.53%, salt: 4.65%, Lys: 5.12%, Met: 1.83%; domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, which includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0111] Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 4000IU, vitamin D3: 2500IU, vitamin E: 95IU, vitamin K3: 20mg, vitamin B1: 25mg, vitamin B2: 55mg, vitamin B6: 55mg, vitamin B12: 0.3mg, D-biotin: 4mg, calcium pantothenate: 40mg, folic acid: 5mg, niacinamide: 80mg, inositol: 240mg, vitamin C monophosphate: 280mg, and the rest is defatted rice bran.

[0112] Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 1.5g, manganese sulfate: 50mg, copper sulfate pentahydrate: 15mg, magnesium sulfate heptahydrate: 3g, potassium iodide: 30mg, sodium selenite: 5mg, cobalt chloride: 8mg, zinc sulfate: 0.6mg, ferrous sulfate: 100mg, calcium iodate: 15mg, sodium selenite: 3mg, and the rest is zeolite powder.

[0113] A method for preparing the blue crab feed as described above comprises the following steps:

[0114] (1) First, weigh each component accurately;

[0115] (2) The larger particles are sieved through a 40-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0116] (3) passing the mixed material through an 80-mesh sieve for ultrafine grinding;

[0117] (4) Then add the material to the conditioner, introduce hot steam, maintain the material and space temperature at 88°C, and perform conditioning for 5 minutes;

[0118] (5) The conditioned materials are gradually added to the granulator for granulation at a temperature of 85° C. The granules are dried and cooled before being stored or packaged.

[0119] Comparative Example 4: (Compared with Example 5, without brewer's yeast hydrolysate)

[0120] A blue crab feed comprises the following raw materials in parts by weight: 15 parts of imported fish meal; 25 parts of domestic fish meal; 4 parts of shrimp shell powder; 8 parts of chicken meal; 7 parts of fermented soybean meal; 10 parts of 46% soybean meal; 3 parts of brewer's yeast; 2 parts of squid paste; 3 parts of enzymatic fish slurry; 5 parts of high-gluten flour; 6 parts of cassava starch; 2.5 parts of imported fish oil; 1.5 parts of soybean lecithin; 2.5 parts of calcium dihydrogen phosphate; 0.6 parts of compound multivitamins; 1.5 parts of compound mineral salts; 2.4 parts of sodium humate; and 2 parts of lignin sulfonate.

[0121] Among them, 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; imported fish meal refers to Japanese grade steam fish meal, the VBN of imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash: 16.53%, salt: 4.65%, Lys: 5.12%, Met: 1.83%; domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, which includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0122] Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 4000IU, vitamin D3: 2500IU, vitamin E: 95IU, vitamin K3: 20mg, vitamin B1: 25mg, vitamin B2: 55mg, vitamin B6: 55mg, vitamin B12: 0.3mg, D-biotin: 4mg, calcium pantothenate: 40mg, folic acid: 5mg, niacinamide: 80mg, inositol: 240mg, vitamin C monophosphate: 280mg, and the rest is defatted rice bran.

[0123] Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 1.5g, manganese sulfate: 50mg, copper sulfate pentahydrate: 15mg, magnesium sulfate heptahydrate: 3g, potassium iodide: 30mg, sodium selenite: 5mg, cobalt chloride: 8mg, zinc sulfate: 0.6mg, ferrous sulfate: 100mg, calcium iodate: 15mg, sodium selenite: 3mg, and the rest is zeolite powder.

[0124] A method for preparing the blue crab feed as described above comprises the following steps:

[0125] (1) First, weigh each component accurately;

[0126] (2) The larger particles are sieved through a 40-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0127] (3) passing the mixed material through an 80-mesh sieve for ultrafine grinding;

[0128] (4) Then add the material to the conditioner, introduce hot steam, maintain the material and space temperature at 88°C, and perform conditioning for 5 minutes;

[0129] (5) The conditioned materials are gradually added to the granulator for granulation at a temperature of 85° C. The granules are dried and cooled before being stored or packaged.

[0130] Comparative Example 5: (Compared with Example 5, without sodium humate)

[0131] A blue crab feed comprises the following raw materials in parts by weight: 15 parts of imported fish meal; 25 parts of domestic fish meal; 4 parts of shrimp shell powder; 8 parts of chicken meal; 7 parts of fermented soybean meal; 10 parts of 46% soybean meal; 3 parts of brewer's yeast; 2 parts of squid paste; 3 parts of enzymatic fish slurry; 5 parts of high-gluten flour; 6 parts of cassava starch; 2.5 parts of imported fish oil; 1.5 parts of soybean lecithin; 2.5 parts of monocalcium phosphate; 0.6 parts of compound multivitamins; 1.5 parts of compound mineral salts; 2 parts of brewer's yeast hydrolyzate; and 2 parts of lignin sulfonate.

[0132] Among them, 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; imported fish meal refers to Japanese grade steam fish meal, the VBN of imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash: 16.53%, salt: 4.65%, Lys: 5.12%, Met: 1.83%; domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, which includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0133] Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 4000IU, vitamin D3: 2500IU, vitamin E: 95IU, vitamin K3: 20mg, vitamin B1: 25mg, vitamin B2: 55mg, vitamin B6: 55mg, vitamin B12: 0.3mg, D-biotin: 4mg, calcium pantothenate: 40mg, folic acid: 5mg, niacinamide: 80mg, inositol: 240mg, vitamin C monophosphate: 280mg, and the rest is defatted rice bran.

[0134] Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 1.5g, manganese sulfate: 50mg, copper sulfate pentahydrate: 15mg, magnesium sulfate heptahydrate: 3g, potassium iodide: 30mg, sodium selenite: 5mg, cobalt chloride: 8mg, zinc sulfate: 0.6mg, ferrous sulfate: 100mg, calcium iodate: 15mg, sodium selenite: 3mg, and the rest is zeolite powder.

[0135] A method for preparing the blue crab feed as described above comprises the following steps:

[0136] (1) First, weigh each component accurately;

[0137] (2) The larger particles are sieved through a 40-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0138] (3) passing the mixed material through an 80-mesh sieve for ultrafine grinding;

[0139] (4) Then add the material to the conditioner, introduce hot steam, maintain the material and space temperature at 88°C, and perform conditioning for 5 minutes;

[0140] (5) The conditioned materials are gradually added to the granulator for granulation at a temperature of 85° C. The granules are dried and cooled before being stored or packaged.

[0141] Comparative Example 6: (Compared with Example 5, without calcium dihydrogen phosphate)

[0142] A blue crab feed comprises the following raw materials in parts by weight: 15 parts of imported fish meal; 25 parts of domestic fish meal; 4 parts of shrimp shell powder; 8 parts of chicken meal; 7 parts of fermented soybean meal; 10 parts of 46% soybean meal; 3 parts of brewer's yeast; 2 parts of squid paste; 3 parts of enzymatic fish slurry; 5 parts of high-gluten flour; 6 parts of cassava starch; 2.5 parts of imported fish oil; 1.5 parts of soybean lecithin; 0.6 parts of compound multivitamins; 1.5 parts of compound mineral salts; 2 parts of brewer's yeast hydrolyzate; 2.4 parts of sodium humate; and 2 parts of lignin sulfonate.

[0143] Among them, 46% soybean meal includes the following components: moisture: 13.15%, protein: 46.19%, ash: 6.05%, fat: 0.2%, Lys: 2.95%, Met: 0.36%; imported fish meal refers to Japanese grade steam fish meal, the VBN of imported fish meal is 80.32mg / 100g, which includes the following components: moisture: 7.32%, protein: 67.29%, fat: 8.05%, ash: 16.53%, salt: 4.65%, Lys: 5.12%, Met: 1.83%; domestic fish meal refers to 66 domestic fish meal, the VBN of domestic fish meal is 97.86mg / 100g, which includes the following components: moisture: 7.50%, protein: 66.72%, fat: 8.15%, ash: 17.50%, salt: 3.35%, Lys: 5.02%, Met: 1.81%.

[0144] Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 4000IU, vitamin D3: 2500IU, vitamin E: 95IU, vitamin K3: 20mg, vitamin B1: 25mg, vitamin B2: 55mg, vitamin B6: 55mg, vitamin B12: 0.3mg, D-biotin: 4mg, calcium pantothenate: 40mg, folic acid: 5mg, niacinamide: 80mg, inositol: 240mg, vitamin C monophosphate: 280mg, and the rest is defatted rice bran.

[0145] Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 1.5g, manganese sulfate: 50mg, copper sulfate pentahydrate: 15mg, magnesium sulfate heptahydrate: 3g, potassium iodide: 30mg, sodium selenite: 5mg, cobalt chloride: 8mg, zinc sulfate: 0.6mg, ferrous sulfate: 100mg, calcium iodate: 15mg, sodium selenite: 3mg, and the rest is zeolite powder.

[0146] A method for preparing the blue crab feed as described above comprises the following steps:

[0147] (1) First, weigh each component accurately;

[0148] (2) The larger particles are sieved through a 40-mesh sieve for primary crushing, and then stirred evenly in a mixer;

[0149] (3) passing the mixed material through an 80-mesh sieve for ultrafine grinding;

[0150] (4) Then add the material to the conditioner, introduce hot steam, maintain the material and space temperature at 88°C, and perform conditioning for 5 minutes;

[0151] (5) The conditioned materials are gradually added to the granulator for granulation at a temperature of 85° C. The granules are dried and cooled before being stored or packaged.

[0152] Test example:

[0153] 1. Feed water resistance test:

[0154] The water resistance of the blue crab feeds of Examples 1-5 and Comparative Examples 1-6 was tested respectively, and the testing method was as follows:

[0155] The test was conducted at the quality control room of Guangdong Ocean Shipping Company in Jiangmen. At room temperature, 11 beakers with a capacity of 500 mL were selected, 350 mL of water was added, and then 100 blue crab feed samples of Examples 1-5 and Comparative Examples 1-6 were taken, and the samples were uniform in size and complete. They were added to the beakers and soaked in water. During the soaking process, all particles must be completely immersed under the water surface. The experiment was conducted according to the market demand for 8h water resistance to check the degree of cracking of the feed particles. If the surface of the particles is cracked, the water resistance is poor. In addition, after the soaking, the feed particles floating to the water surface were counted, and then the proportion of cracked particles and the proportion of feed particles floating to the water surface were counted.

[0156] The test results are shown in Table 1:

[0157] Table 1: Water resistance test results:

[0158]

[0159]

[0160] As can be seen from Table 1, the blue crab feed of the present invention has cracked particles accounting for less than 9% in the 8h water resistance test, and there are no particles floating to the water surface. It has excellent water resistance, meets the "holding food" needs of blue crabs, has less loss during feeding, and prevents pollution to the water body.

[0161] At the same time, by comparing Example 5 with Comparative Examples 1-3, it can be seen that when the blue crab feed lacks one of the high-gluten flour, cassava starch and lignin sulfonate, the water resistance of the blue crab feed will be greatly reduced, indicating that the high-gluten flour, cassava starch and lignin sulfonate in the blue crab feed of the present invention have a synergistic effect on the water resistance of the feed particles.

[0162] 2. Test on the effect of feed on the growth of blue crabs:

[0163] The blue crabs were fed with the blue crab feeds of Examples 1-5 and Comparative Examples 1-6 respectively, and the weight gain rate, survival rate and molting rate of the blue crabs were recorded. The feeding method was:

[0164] The experiment was conducted at the headquarters of Yuehai Feed Group, using a semi-circulating water method with regular sewage discharge. The group aquarium was used for the experiment. The aquarium volume was 300L. The experiment was designed with 11 groups, 3 replicates in each group, 20 blue crabs in each replicate, and the blue crab size was 150±5g. The experimental period was 4 weeks. Before the experiment began, a one-week temporary rearing was carried out. During the temporary rearing period, the basic feed was fed, and the feeding amount was strictly controlled. The feeding amount was 0.5% of the total weight of each replicate. During the temporary rearing period, the loss was supplemented in time and the health status was observed. The formal experiment began after the situation was normal and could meet the experimental needs. The experiment lasted for 4 weeks.

[0165] The weight gain rate, survival rate and molting rate of blue crabs are shown in Table 2 below:

[0166] Table 2: Blue crab feeding test results:

[0167]

[0168]

[0169] As shown in Table 2, feeding the blue crabs with the blue crab feed of the present invention can make the weight gain rate of blue crabs reach above 52.6%, the survival rate of blue crabs reach above 92.5%, and the molting rate of blue crabs reach above 71.5%.

[0170] At the same time, by comparing Example 5 with Comparative Examples 4-5, it can be seen that when the blue crab feed lacks one of the brewer's yeast hydrolyzate and the sodium humate, the survival rate of the blue crab will be greatly reduced, indicating that the brewer's yeast hydrolyzate and the sodium humate in the blue crab feed of the present invention have a synergistic effect on enhancing the immune function of the blue crab.

[0171] By comparing Example 5 with Comparative Example 6, it can be seen that when monocalcium phosphate is lacking in the mud crab feed, the molting rate of the mud crab will be greatly reduced, and the survival rate of the mud crab will be greatly reduced.

[0172] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A mud crab feed, characterized in that: The blue crab feed comprises the following raw materials in parts by weight: Imported fish meal: 10-30 parts; Domestic fish meal: 10-30 parts; Shrimp shell powder: 1-10 parts; Chicken powder: 2-10 servings; Fermented soybean meal: 3-15 parts; 46% soybean meal: 1-15 portions; Brewer's yeast: 1-5 parts; Squid paste: 1-5 portions; Enzymatic fish slurry: 2-5 portions; High-gluten flour: 3-10 parts; Tapioca starch: 2-10 parts; Imported fish oil: 1-3 servings; Soy lecithin: 1-3 parts; Calcium dihydrogen phosphate: 0.5-5 parts; Composite multidimensional: 0.1-1.5 parts; Complex mineral salt: 1-3 parts; Brewer's yeast hydrolyzate: 1-3 parts; Sodium humate: 0.1-3 parts; Lignin sulfonate: 0.1-3 parts; the mud crab feed is prepared by the following steps: (1) Grinding the raw materials and mixing them into a mixed material; (2) The mixed material obtained in step (1) is granulated after conditioning and drying.

2. A mud crab feed according to claim 1, characterized in that: The blue crab feed comprises the following raw materials in parts by weight: Imported fish meal: 10-20 parts; Domestic fish meal: 20-30 parts; Shrimp shell powder: 2-6 portions; Chicken powder: 5-10 servings; Fermented soybean meal: 4-15 parts; 46% soybean meal: 5-15 servings; Brewer's yeast: 1-5 parts; Squid paste: 1-5 portions; Enzymatic fish slurry: 2-5 portions; High-gluten flour: 3-8 parts; Tapioca starch: 3-10 parts; Imported fish oil: 1-3 servings; Soy lecithin: 1-3 parts; Calcium dihydrogen phosphate: 0.5-3 parts; Composite multidimensional: 0.2-0.8 parts; Complex mineral salt: 1-3 parts; Brewer's yeast hydrolyzate: 1-3 parts; Sodium humate: 2-3 parts; Lignin sulfonate: 1-3 parts.

3. The blue crab feed according to claim 1, characterized in that: Each kilogram of the complex multivitamin includes the following ingredients: vitamin A: 3000-5000IU, vitamin D3: 2000-3000IU, vitamin E: 90-100IU, vitamin K3: 15-30mg, vitamin B1: 20-30mg, vitamin B2: 50-60mg, vitamin B6: 50-60mg, vitamin B12: 0.2-0.5mg, D-biotin: 3-5mg, calcium pantothenate: 30-50mg, folic acid: 3-7mg, niacinamide: 70-100mg, inositol: 230-250mg, vitamin C monophosphate: 260-300mg, and the rest is defatted rice bran.

4. The blue crab feed according to claim 1, characterized in that: Each kilogram of the composite mineral salt includes the following ingredients: potassium dihydrogen phosphate: 0.9-2.0g, manganese sulfate: 30-80mg, copper sulfate pentahydrate: 10-20mg, magnesium sulfate heptahydrate: 1-5g, potassium iodide: 20-50mg, sodium selenite: 3-8mg, cobalt chloride: 6-10mg, zinc sulfate: 0.3-1.0mg, ferrous sulfate: 60-150mg, calcium iodate: 10-20mg, sodium selenite: 1-5mg, and the rest is zeolite powder.

5. A method for preparing the blue crab feed according to any one of claims 1 to 4, characterized in that: The following steps are involved: (1) Grinding the raw materials and mixing them into a mixed material; (2) The mixed material obtained in step (1) is granulated after conditioning and drying.

6. The method for preparing a mud crab feed according to claim 5, characterized in that: In step (1), the pulverization includes primary pulverization and ultrafine pulverization, wherein the primary pulverization is to pulverize the material through a 30-50 mesh sieve, and the ultrafine pulverization is to pulverize the material through a 70-100 mesh sieve.

7. The method for preparing a mud crab feed according to claim 5, characterized in that: In step (2), the conditioning is to add the material into the conditioner, introduce hot water vapor, maintain the material and space temperature at 80-110°C, and the conditioning time is 3-6 minutes.

8. The method for preparing a mud crab feed according to claim 5, characterized in that: In step (2), the granulation temperature is 75-100°C.

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