Microelement formula suitable for industrial recirculating aquaculture of penaeus vannamei boone under artificial seawater condition and use method of microelement formula

Abstract

The invention provides a trace element formula suitable for industrial recirculating aquaculture of penaeus vannamei under an artificial seawater condition and a use method of the trace element formula, and relates to the field of industrial recirculating aquaculture. The trace element formula comprises potassium bromide, boric acid, strontium chloride, sodium silicate, zinc sulfate, ferrous sulfate, copper sulfate, manganese chloride, sodium selenite, ammonium molybdate, calcium gluconate and lysine, and the trace elements are added into a common feed to feed penaeus vannamei boone. The defects in the prior art are overcome, the growth efficiency of the penaeus vannamei boone is effectively improved by supplementing related trace elements in the feed, and the economic benefits of culture are increased.

Description

Technical Field

[0001] The present invention relates to the field of industrial circulating aquaculture, and in particular to a trace element formula suitable for industrial circulating aquaculture of whiteleg shrimp under artificial seawater conditions and a use method thereof. Background Art

[0002] Penaeus vannamei is a tropical shrimp species with a wide range of temperatures and salinities, native to the waters of South America. Since the 1990s, its cultivation has been gradually promoted in coastal areas of China and has now become the main farmed shrimp species in my country. Freshwater aquaculture is also gradually being carried out in inland areas. However, there are problems such as low survival rate, slow growth rate, and low yield. Especially in the middle and late stages of aquaculture, it is prone to molting failure and soft shells. This is largely due to the lack of mineral elements in the freshwater that support the growth of Penaeus vannamei. Industrial recirculating aquaculture is a modern method of farming whiteleg shrimp (Penaeus vannamei). It is characterized by high input and high output. The farming equipment and facilities are more complex than traditional farming methods, and the farming density is greater, resulting in higher yields. However, the existing feed used in whiteleg shrimp farming often cannot meet the requirements of high-density farming methods, severely limiting the weight gain and quality of the shrimp. Therefore, how to further improve the economic benefits of shrimp farming on this basis is an important development direction at this stage. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a trace element formula and a method of use suitable for industrial circulating aquaculture of whiteleg shrimp under artificial seawater conditions. By supplementing the relevant trace elements in the feed, the growth efficiency of whiteleg shrimp is effectively improved, thereby increasing the economic benefits of aquaculture.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: A trace element formula suitable for industrial recirculating aquaculture of whiteleg shrimp in artificial seawater conditions, the trace element formula comprising the following substances in parts by weight: 10-60 parts of potassium bromide, 30-100 parts of boric acid, 10-20 parts of strontium chloride, 1-10 parts of sodium silicate, 1-10 parts of zinc sulfate, 1-20 parts of ferrous sulfate, 2-30 parts of copper sulfate, 1-10 parts of manganese chloride, 1-25 parts of sodium selenite, 1-30 parts of ammonium molybdate, 20-100 parts of calcium gluconate, and 5-50 parts of lysine.

[0005] The method of using the trace element formula is to add the trace element formula to the feed at an amount of 83-465 mg / kg for feeding.

[0006] Preferably, the method of adding the trace element formula to the shrimp feed comprises the following steps: (1) Weigh the feed and trace element formula in proportion, and dissolve the trace element formula in clean water to obtain a trace element solution; (2) Add the trace element solution to the feed and stir evenly to obtain the mixed feed for feeding.

[0007] Preferably, the amount of clean water used in step (1) is 15%-20% of the total weight of the feed.

[0008] Preferably, the mixed feed in step (2) can be used after being stored for more than 2 hours and is used up within 48 hours.

[0009] The present invention provides a trace element formula suitable for industrial circulating aquaculture of whiteleg shrimp under artificial seawater conditions and a method for using the same. Compared with the prior art, the present invention has the following advantages: The present invention adopts a compound of multiple trace elements as an auxiliary additive for the breeding feed of whiteleg shrimp, which can significantly improve the growth efficiency of whiteleg shrimp to a certain extent, while increasing the hardness of whiteleg shrimp shells, improving the quality of whiteleg shrimp, and ensuring the economic benefits of breeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Schematic diagram of whiteleg shrimp fed with the compound feed in Example 1 for 4 weeks; Figure 2 This is a schematic diagram of whiteleg shrimp after being fed with ordinary feed for 4 weeks. DETAILED DESCRIPTION

[0011] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0012] Example 1: Preparation of compound feed: 1. Prepare the trace element composition according to the following parts by weight: 10 parts of potassium bromide, 30 parts of boric acid, 10 parts of strontium chloride, 1 part of sodium silicate, 1 part of zinc sulfate, 1 part of ferrous sulfate, 2 parts of copper sulfate, 1 part of manganese chloride, 1 part of sodium selenite, 1 part of ammonium molybdate, 20 parts of calcium gluconate, 5 parts of lysine; 2. Preparation of compound feed: Select conventional white shrimp feed available on the market (raw materials include: fish meal, soybean meal, flour, fish oil, calcium dihydrogen phosphate, vitamin A, vitamin D3, vitamin E, niacinamide, D-calcium pantothenate, copper sulfate, zinc sulfate, ferrous sulfate, etc., with the following nutritional composition: crude protein ≥ 43%, crude fat ≥ 6%, crude ash ≤ 15%, crude fiber ≤ 4%, total phosphorus 1-2.5%, lysine > 2.6) as raw materials. Weigh each component according to the trace element composition added at a rate of 83 mg per kilogram of white shrimp feed. The trace element composition is dissolved in clean water accounting for 15% of the total weight of the white shrimp feed, stirred to dissolve evenly, and then added into the white shrimp feed and continued to stir evenly to obtain a compound feed.

[0013] Example 2: Preparation of compound feed: 1. Prepare the trace element composition according to the following parts by weight: 15 parts of potassium bromide, 30 parts of boric acid, 10 parts of strontium chloride, 10 parts of sodium silicate, 2 parts of zinc sulfate, 2 parts of ferrous sulfate, 3 parts of copper sulfate, 1 part of manganese chloride, 5 parts of sodium selenite, 10 parts of ammonium molybdate, 50 parts of calcium gluconate, and 5 parts of lysine; 2. Preparation of compound feed: Select conventional white shrimp feed available on the market (raw materials include: fish meal, soybean meal, flour, fish oil, calcium dihydrogen phosphate, vitamin A, vitamin D3, vitamin E, niacinamide, D-calcium pantothenate, copper sulfate, zinc sulfate, ferrous sulfate, etc., with the following nutritional composition: crude protein ≥ 41%, crude fat ≥ 6%, crude ash ≤ 15%, crude fiber ≤ 4%, total phosphorus 1-2.5%, lysine > 2.7) as raw materials. Weigh each component so that 465 mg of trace element composition is added per kilogram of white shrimp feed; The trace element composition is dissolved in clean water which accounts for 20% of the total weight of the white shrimp feed, stirred to dissolve evenly, and then added into the white shrimp feed and continued to stir evenly to obtain a compound feed.

[0014] Detection: 1200 P5 shrimp fry of whiteleg shrimp were selected and placed in 3 net frames with circulating water. The frames contained artificially prepared seawater and no biological bait in the water. 300 shrimp fry were fed in each net frame with the compound feed of Example 1, the compound feed of Example 2 and ordinary ordinary feed without added trace elements. The shrimps were fed 4 times a day, at 8:00, 12:00, 18:00 and 21:00 respectively. No water was changed or sewage was discharged every day, and the fish were aerated and oxygenated continuously. Natural light was applied indoors, the dissolved oxygen content was greater than 6.0 mg / L, the ammonia nitrogen was less than 0.2 mg / L, the water temperature was 28-30°C, the salinity was 15-20‰, and the pH was 7.8-8.0. After feeding for 4 weeks, samples were taken from each pool and weighed to calculate the average weight. The specific results are shown in Table 1 below: Table 1

[0015] After 4 weeks of culture, the shrimp shells of the above groups were subjected to manual sensory evaluation. The evaluation method is as follows: Press the middle of the shrimp shell with your thumb to feel the resistance.

[0016] Hardness level: Level 1 (soft): easy to dent, no obvious rebound; Level 2 (medium): slightly dent, slow rebound; Level 3 (hard): difficult to dent, fast rebound.

[0017] The shrimp shell hardness of each group is shown in Table 2 below: Table 2

[0018] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A trace element formula suitable for industrial circulating aquaculture of whiteleg shrimp in artificial seawater conditions, characterized in that: The trace element formula is composed of the following substances in parts by weight: 10-60 parts of potassium bromide, 30-100 parts of boric acid, 10-20 parts of strontium chloride, 1-10 parts of sodium silicate, 1-10 parts of zinc sulfate, 1-20 parts of ferrous sulfate, 2-30 parts of copper sulfate, 1-10 parts of manganese chloride, 1-25 parts of sodium selenite, 1-30 parts of ammonium molybdate, 20-100 parts of calcium gluconate, and 5-50 parts of lysine.

2. A method for using the trace element formula according to claim 1, characterized in that: The method of use is to add the trace element formula to feed in an amount of 83-465 mg / kg for feeding.

3. The method of use according to claim 2, wherein: The method of adding trace element formula to shrimp feed includes the following steps: (1) Weigh the feed and trace element formula in proportion, and dissolve the trace element formula in clean water to obtain a trace element solution; (2) Add the trace element solution to the feed and stir evenly to obtain the mixed feed for feeding.

4. The method of use according to claim 3, wherein: The amount of clean water used in step (1) is 15%-20% of the total weight of the feed.

5. The method of use according to claim 3, characterized in that: The mixed feed in step (2) can be used after being stored for more than 2 hours and must be used up within 48 hours.

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