Loach fry cultivation method

Abstract

Provided is a loach fry cultivation method, the method comprising fry pond clearing, water quality management, and feeding management. First, performing fry pond clearing, controlling the depth of a cleared fry pond at 40-60 cm, placing loach fry hatched on the same day into the fry pond and controlling the stocking density of the loach fry at 450-600 fish per square meter; after placing the loach fry into the fry pond, performing water quality management on the fry pond and performing feeding management for the loach fry in the fry pond until the loach fry reach a length of 3-5 cm. During the loach fry feeding period, feeding is skipped every other day. A one-day period without feeding allows the gastrointestinal tracts of the loach fry to rest and adjust, and effectively prevents excessive fish feed from accumulating in the fry pond.

Description

A method for cultivating loach seedlings Technical Field

[0001] The invention relates to loach seedling cultivation, in particular to a loach seedling cultivation method. Background Art

[0002] As a common freshwater fish, loach has delicious meat, rich nutrition, high protein and low fat, and is deeply loved by consumers. However, the wild resources of loach are often affected by overfishing, resulting in resource depletion, which cannot meet the market consumers' demand for loach. More and more farmers are investing in loach breeding. As the number of people breeding loach increases, the method of cultivating loach seedlings is becoming more and more important.

[0003] However, the current loach seedling cultivation method has the following disadvantages: the existing loach seedling cultivation method does not provide a good growth environment for the loach seedlings, the mortality rate of the loach seedlings is high, and the cultivation cycle of the loach seedlings is long; the existing loach seedling cultivation method does not provide enough food for the loach seedlings, and the loach seedlings are highly dependent on artificial bait, which leads to high seedling cultivation costs and low returns on loach seedling cultivation; the existing loach seedling cultivation method is continuous feeding, which, on the one hand, leads to excess bait in the seedling pond, which easily pollutes the water in the seedling pond and causes waste of bait. On the other hand, the stomach and intestines of the loach seedlings cannot get rest and adjustment, which is not conducive to improving the food digestion and absorption capacity of the loach seedlings, and affects the growth of the loach seedlings. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the existing loach seedling cultivation method, that is, the loach seedlings do not provide a good growth environment for the loach seedlings, the mortality rate of the loach seedlings is high, and the cultivation cycle of the loach seedlings is long; in the existing loach seedling cultivation method, the food of the loach seedlings is not rich and diverse enough, and the dependence on artificial bait is high, resulting in high seedling cultivation costs, and thus low returns on loach seedling cultivation; in the existing loach seedling cultivation method, continuous feeding is carried out, which, on the one hand, leads to excess bait in the seedling pond, which easily pollutes the water body in the seedling pond and causes waste of bait. On the other hand, the stomach and intestines of the loach seedlings cannot get rest and adjustment, which is not conducive to improving the food digestion and absorption capacity of the loach seedlings, and affects the growth of the loach seedlings. A loach seedling cultivation method is proposed.

[0005] The purpose of the present invention can be achieved through the following technical solutions: a loach seedling cultivation method, which includes seedling pond arrangement, water quality management and feeding management, firstly, the seedling pond is arranged, the water depth of the arranged seedling pond is controlled to be 40-60 cm, loach seedlings hatched on the same day are put into the seedling pond, the stocking density of the loach seedlings is controlled to be 450-600 per square meter, after the loach seedlings are put in, the water quality of the seedling pond is managed and the loach seedlings in the seedling pond are fed until the loach seedlings reach 3-5 cm in length. Density, as well as water quality management of the seedling pond, keep the water clean, provide a good growth environment for loach seedlings, reduce the possibility of loach seedling death, and improve the survival rate. This breeding method manages water quality and feeding. Good water quality and reasonable feeding management can provide sufficient oxygen and nutrition, promote the accumulation of protein and fat in the loach seedlings, make the loach seedlings stronger, and at the same time, promote the growth of loach seedlings, thereby shortening the breeding cycle of loach seedlings. By increasing the growth rate, a large number of loach seedlings can be obtained in a shorter time, thereby increasing breeding income;

[0006] Among them, the seedling pond preparation: clean and disinfect the seedling pond, and then apply base fertilizer to the seedling pond. By cleaning and disinfecting the seedling pond and applying base fertilizer, the bacteria, viruses and other pathogens in the seedling pond can be killed, and the occurrence and spread of diseases can be effectively prevented. At the same time, the invasion of loach seedlings by bacteria, viruses and other pathogens can be reduced, the immunity of loach seedlings can be improved, and the incidence rate can be reduced. By applying base fertilizer to the seedling pond, plankton such as rotifers, spirulina and ciliates can be cultivated, and these plankton can be used as food for loach seedlings. On the one hand, it can improve the diversity of loach seedlings' food, so that loach seedlings can obtain richer nutrition, and make the loach seedlings grow and develop better. On the other hand, it can reduce the loach seedlings' demand for artificial bait, thereby reducing the input cost of artificial bait in the loach seedling cultivation process, so that the economic benefits of cultivating loach seedlings by this cultivation method are higher. On the other hand, eating plankton can increase the amount of exercise of loach seedlings, increase the activity of loach seedlings, and thus improve the survival rate of loach seedling cultivation.

[0007] Water quality management: After the loach seedlings are raised in the pond for 7-15 days, new water should be added to the seedling pond every 5-7 days. At the same time, the water injection height should be controlled at 12-15 cm each time. The water depth of the seedling pond should not exceed 60 cm after injection. Adding new water to the seedling pond every 5-7 days can maintain the freshness of the water and effectively reduce the concentration of harmful substances and metabolites in the water quality. After each water injection, the water depth of the seedling pond should be controlled at 12-15 cm to avoid the water depth being too shallow or too deep, which is conducive to the activities and foraging of loach seedlings and also helps to stabilize the water quality. Regular injection of new water and control of the water level can maintain the water quality in the loach seedling pond in good condition, provide a good living environment, and promote the healthy growth of loach seedlings.

[0008] Feeding management: 5-7 days before the loach seedlings are put into the pond, grind the soybeans into soy milk and feed them. Sprinkle soy milk into the seedling pond twice a day. The time interval between soy milk feeding should be greater than 6 hours. The amount of soybeans in each soy milk feeding should be controlled at 3.5-4.8 grams per square meter. 5-7 days after the loach seedlings are put into the pond, stop feeding soy milk and switch to feeding artificial mixed bait. Feed the seedling pond twice a day with artificial mixed bait. The time interval between feeding artificial mixed bait should be greater than 8 hours. The amount of artificial mixed bait should be controlled at 3-4 grams per square meter each time. Stop feeding artificial mixed bait for one day after every 5-7 days. The taste of soy milk is relatively strong. Feeding with soy milk first can stimulate the appetite of loach and promote its food intake. In addition, soy milk is rich in protein, carbohydrates and And minerals and other nutrients can provide the nutrients needed by loach seedlings, which helps them grow healthily. During the feeding period of loach seedlings, no feeding is done for one day. On the one hand, after a day of not feeding, the gastrointestinal tract of the loach seedlings can rest and adjust, which helps to improve the food digestion and absorption capacity of the loach seedlings, thereby enhancing their growth ability. On the other hand, stopping feeding for one day allows the loach seedlings to eat more actively in the next feeding cycle, which can promote the appetite of the loach seedlings, thereby increasing their ability to absorb nutrients and promote growth. In addition, stopping feeding for one day allows the surplus bait in the seedling pond to be consumed, effectively avoiding excessive bait accumulation in the seedling pond, thereby reducing bait waste. At the same time, it reduces water pollution and keeps the water clear and transparent.

[0009] The further technical improvement of the present invention is that the selected seedling pond area is 600-2000 square meters and the pond wall height is 100-140 centimeters.

[0010] The further technical improvement of the present invention is that the specific steps of arranging the seedling pond are:

[0011] Step 1: Use clean water to soak and rinse the seedling pool 3-5 times, and then drain the pool water;

[0012] Step 2: Spray quicklime for disinfection, and control the amount of quicklime per square meter to 90-120 grams;

[0013] Step 3: After spraying quicklime for 24-48 hours, spray bleach solution for secondary disinfection. The concentration of bleach solution is controlled at 10-18 mg / L.

[0014] Step 4: After 7-9 days of spraying and disinfecting with bleach solution, rinse the seedling pond 1-2 times with clean water and add new water;

[0015] Step 5: Apply 1-2 kg of base fertilizer per cubic meter to the seedling pond. Leave the fertilizer for 5-8 days until the water in the seedling pond turns yellow-green.

[0016] By spraying quicklime and bleaching powder solution for secondary disinfection on the loach seedling pond, the health of the loach seedlings can be effectively protected, the possibility of disease transmission can be reduced, and the breeding efficiency can be improved. Both quicklime and bleaching powder solution have strong disinfection capabilities and can effectively kill bacteria and viruses in the loach seedling pond, reducing the risk of disease transmission. The use of quicklime and bleaching powder can adjust the pH value of the water and effectively improve the transparency and clarity of the water, providing a more suitable living environment for loach. Through secondary disinfection, the pathogenic microorganisms in the pond can be more comprehensively removed, the risk of disease transmission can be reduced, and the survival rate and health of loach can be improved.

[0017] A further technical improvement of the present invention is that after the loach seedlings are released into the seedling pond, duckweed is placed in the seedling pond. By placing duckweed in the seedling pond, on the one hand, the dense coverage of the duckweed can provide a hiding place for the loach seedlings, which helps to reduce external interference and the threat of predators, and improve the survival rate of the loach seedlings. On the other hand, the coverage of the duckweed can reduce the amount of light entering the water body, blocking the large accumulation of nutrients in the water, thereby slowing down the growth rate of algae and maintaining the clarity and transparency of the water in the seedling pond. On the other hand, the duckweed can play a temperature control role, slowing down the rate of change of water temperature, and thereby reducing the impact of water temperature changes on loach seedlings.

[0018] The further technical improvement of the present invention is that the artificial mixed bait is composed of fish meal, shrimp meal, soybean meal, wheat flour and bone meal. Fish meal and shrimp meal are rich in protein and amino acids, which can provide high-quality protein required by loach seedlings and promote growth and development. Soybean meal is rich in plant protein, wheat flour contains carbohydrates, which can provide the energy required by loach seedlings, and bone meal is rich in minerals such as calcium and phosphorus, which is conducive to the growth of bones of loach seedlings. The ingredients in the artificial mixed bait are reasonably matched, which can meet the nutritional needs of loach seedlings, improve their immunity and reduce the occurrence of diseases. The feeding method of the artificial mixed bait is specifically as follows: soaking the artificial mixed bait in baking soda solution, stirring it to make the artificial mixed bait into a paste, and sprinkling the paste-like artificial mixed bait along the edge of the seedling pond. Soaking and using the artificial mixed bait in baking soda solution can improve the nutritional value and taste of the artificial mixed bait, improve the digestion and absorption capacity of loach seedlings, prevent water acidification and inhibit the growth of pathogenic microorganisms, thereby promoting the healthy growth of loach seedlings and breeding effects.

[0019] The further technical improvement of the present invention is that the ratio of fish meal, shrimp meal, soybean meal, wheat flour and bone meal in the artificial mixed bait is controlled at 5-10:2-5:20-30:40-50:3-7, wherein the concentration of baking soda solution is controlled at 0.2%-0.5%.

[0020] A further technical improvement of the present invention is that after the loach seedlings are put into the pond, an effective microbial agent is added into the seedling pond, and the mass ratio of the effective microbial agent added for the first time to the water body of the seedling pond is controlled at 1:1000000-1500000, and thereafter, the effective microbial agent is added again every 3-8 days, and the mass ratio of the effective microbial agent added again to the water body of the seedling pond is controlled at 1:5000000-9000000.

[0021] A further technical improvement of the present invention is that the base fertilizer applied is organic fertilizer, which is made from cow dung, pig dung, chicken dung and duck dung through decomposition and fermentation. 3-7 days after the loach seedlings are put into the pond, base fertilizer is added to the seedling pond every 5-7 days, and the base fertilizer added to the seedling pond is controlled at 0.3-0.6 kilograms per cubic meter.

[0022] A further technical improvement of the present invention is that: one day before the loach seedlings are placed in the seedling pond, 3-5 basins of water are taken from the seedling pond, 3-5 loach seedlings are placed in each basin of water, and they are observed for 10-15 hours. If the loach seedlings in each basin of water survive normally, the loach seedlings are placed in the seedling pond for cultivation.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] In the present invention, the breeding method arranges the seedling pond, controls the water depth and stocking density, and manages the water quality of the seedling pond to keep the water clean, thereby providing a good growth environment for loach seedlings, reducing the possibility of death of loach seedlings, and improving the survival rate. The breeding method performs water quality management and feeding management. Good water quality and reasonable feeding management can provide sufficient oxygen and nutrition, promote the accumulation of protein and fat in the loach seedlings, make the loach seedlings stronger, and at the same time, promote the growth of loach seedlings, thereby shortening the breeding period of loach seedlings. By increasing the growth rate, a large number of loach seedlings can be obtained in a relatively short time, thereby increasing breeding income.

[0025] In the present invention, by cleaning and disinfecting the seedling pond and applying base fertilizer, bacteria, viruses and other pathogens present in the seedling pond can be killed, and the occurrence and spread of diseases can be effectively prevented. At the same time, the invasion of loach seedlings by pathogens such as bacteria and viruses is reduced, the immunity of loach seedlings is improved, and the incidence rate is reduced. By applying base fertilizer to the seedling pond, plankton such as rotifers, spirulina and ciliates can be cultivated, and these plankton can be used as food for loach seedlings. On the one hand, the diversity of loach seedlings' food can be improved, so that loach seedlings can obtain richer nutrition and the growth and development of loach seedlings can be better. On the other hand, the demand of loach seedlings for artificial bait can be reduced, thereby reducing the investment cost of artificial bait in the process of cultivating loach seedlings, so that the economic benefit of cultivating loach seedlings by this cultivation method is higher. On the other hand, eating plankton can increase the amount of exercise of loach seedlings, increase the activity of loach seedlings, and thus improve the survival rate of loach seedlings.

[0026] In the present invention, during the feeding period of the loach seedlings, no feeding is performed at intervals of one day. On the one hand, after not feeding for one day, the gastrointestinal tract of the loach seedlings can be rested and adjusted, which helps to improve the food digestion and absorption capacity of the loach seedlings, thereby enhancing their growth capacity. On the other hand, stopping feeding for one day allows the loach seedlings to eat more actively in the next feeding cycle, which can promote the appetite of the loach seedlings, thereby increasing their ability to absorb nutrients and promoting their growth. In addition, stopping feeding for one day allows the surplus bait in the seedling pond to be consumed, effectively avoiding excessive bait from accumulating in the seedling pond, thereby reducing bait waste. At the same time, water pollution is reduced and the water body is kept clear and transparent.

[0027] DETAILED DESCRIPTION

[0028] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example 1

[0030] A loach seedling cultivation method includes seedling pond preparation, water quality management, and feeding management. The selected seedling pond has an area of ​​1,000 square meters and a pond wall height of 120 centimeters. The seedling pond is first prepared, and the water depth of the prepared seedling pond is controlled to be 45 centimeters. One day before the loach seedlings are placed in the seedling pond, four basins of water are taken from the seedling pond, and four loach seedlings are placed in each basin of water. After observation for 12 hours, if the loach seedlings in each basin of water survive normally, the loach seedlings are placed in the seedling pond for cultivation, and loach seedlings hatched on the same day are placed in the seedling pond. The stocking density of the loach seedlings is controlled to be 480 per square meter. After the loach seedlings are placed, duckweed is placed in the seedling pond after the loach seedlings are placed in the seedling pond. After the loach seedlings are placed in the pond, effective microbial agents are placed in the seedling pond. The mass ratio of the effective microbial agents initially added to the water body of the seedling pond is controlled to be 1:1,200,000. Thereafter, effective microbial agents are added again every 7 days. agent, the mass ratio of the effective microbial agent added again to the water in the seedling pond is controlled at 1:8000000, the water quality of the seedling pond is managed, and the loach seedlings in the seedling pond are fed until the loach seedlings reach 3.5 cm in length. The breeding method maintains clean water quality by tidying up the seedling pond, controlling the water depth and stocking density, and managing the water quality of the seedling pond, thereby providing a good growth environment for the loach seedlings, reducing the possibility of death of the loach seedlings, and improving the survival rate. The breeding method performs water quality management and feeding management. Good water quality and reasonable feeding management can provide sufficient oxygen and nutrition, promote the accumulation of protein and fat in the loach seedlings, make the loach seedlings stronger, and at the same time, promote the growth of the loach seedlings, thereby shortening the breeding period of the loach seedlings. By increasing the growth rate, a large number of loach seedlings can be obtained in a shorter time, thereby increasing breeding income;

[0031] Among them, the seedling pond preparation: clean and disinfect the seedling pond, and then apply base fertilizer to the seedling pond. The specific steps of seedling pond preparation are:

[0032] Step 1: Use clean water to soak and rinse the seedling pool 4 times and drain the pool water;

[0033] Step 2: Spray quicklime for disinfection, and control the amount of quicklime to 100 grams per square meter;

[0034] Step 3: After spraying quicklime for 28 hours, spray bleach solution for secondary disinfection. The concentration of bleach solution is controlled at 12 mg / L.

[0035] Step 4: After 7 days of spraying and disinfecting with bleach solution, rinse the seedling pond once with clean water and fill it with new water;

[0036] Step 5: The base fertilizer applied to the seedling pond is controlled at 1.2 kg per cubic meter. After fertilization, it is left for 6 days to make the water in the seedling pond turn yellow-green. The base fertilizer applied is organic fertilizer, which is made from cow dung, pig dung, chicken dung and duck dung through decomposition and fermentation. Five days after the loach seedlings are put into the pond, base fertilizer is added to the seedling pond every 5 days. The base fertilizer added to the seedling pond is controlled at 0.35 kg per cubic meter. By cleaning and disinfecting the seedling pond and applying base fertilizer, the bacteria, viruses and other pathogens in the seedling pond can be killed, and the occurrence and spread of diseases can be effectively prevented. At the same time, the invasion of pathogens such as bacteria and viruses on the loach seedlings can be reduced, the immunity of the loach seedlings can be improved, and the incidence rate can be reduced. Applying bottom fertilizer in the pond can cultivate plankton such as rotifers, spirulina and ciliates. These plankton can serve as food for loach seedlings. On the one hand, it can improve the diversity of loach seedlings' food, so that loach seedlings can obtain richer nutrition and make the loach seedlings grow and develop better. On the other hand, it can reduce the loach seedlings' demand for artificial bait, thereby reducing the input cost of artificial bait in the process of cultivating loach seedlings, so that the economic benefit of cultivating loach seedlings by this cultivation method is higher. On the other hand, eating plankton can increase the amount of exercise of loach seedlings, increase the activity of loach seedlings, and thus improve the survival rate of loach seedlings.

[0037] Water quality management: After the loach seedlings are raised in the pond for 8 days, new water should be added to the seedling pond every 6 days. At the same time, the water injection height should be controlled at 14 cm each time. After injection, the water depth of the seedling pond should be controlled at 55 cm. Adding new water to the seedling pond every 6 days can keep the water fresh and effectively reduce the concentration of harmful substances and metabolites in the water quality. After each water injection, the water depth of the seedling pond should be controlled at 14 cm to avoid the water depth being too shallow or too deep, which is conducive to the activities and foraging of loach seedlings and also helps to stabilize the water quality. Regular injection of new water and control of the water level can maintain the water quality in the loach seedling pond in good condition, provide a good living environment, and promote the healthy growth of loach seedlings.

[0038] Feeding management: 6 days before the loach fry are put into the pond, grind soybeans into soy milk and feed them. Sprinkle soy milk into the fry pond twice a day. The interval between soy milk feeding is controlled at 8 hours. The amount of soybeans used in each soy milk feeding is controlled at 4 grams per square meter. 6 days after the loach fry are put into the pond, stop feeding soy milk and switch to feeding artificial mixed feed. Feed the fry pond twice a day with artificial mixed feed, which consists of fish meal, shrimp meal, soybean meal, wheat flour and bone meal. The feeding method of artificial mixed feed is as follows: Soak the artificial mixed bait in baking soda solution and stir it to make it into a paste. Sprinkle the paste-like artificial mixed bait along the edge of the seedling pond. The ratio of fish meal, shrimp meal, soybean meal, wheat flour and bone meal in the artificial mixed bait is controlled at 7:3:25:45:4, and the concentration of baking soda solution is controlled at 0.25%. The time interval for feeding the artificial mixed bait is 9 hours, and the amount of artificial mixed bait used each time is controlled at 3.5 grams per square meter. On the 6th, stop feeding for one day. The taste of soy milk is relatively strong. Feeding with soy milk first can stimulate the appetite of loach and promote its food intake. In addition, soy milk is rich in nutrients such as protein, carbohydrates and minerals, which can provide the nutrients needed by loach seedlings and help them grow healthily. During the feeding period of loach seedlings, do not feed them for one day. On the one hand, after a day of not feeding, the gastrointestinal tract of loach seedlings can rest and adjust, which helps to improve the food digestion and absorption capacity of loach seedlings, thereby enhancing their growth ability. On the other hand, stopping feeding for one day allows the loach seedlings to eat more actively in the next feeding cycle, which can promote the appetite of loach seedlings, thereby increasing their ability to absorb nutrients and promote growth. In addition, stopping feeding for one day allows the surplus bait in the seedling pond to be consumed, effectively avoiding excessive bait accumulation in the seedling pond, thereby reducing bait waste and at the same time, reducing water pollution and keeping the water clear and transparent.

[0039] Example 2

[0040] A loach seedling cultivation method includes seedling pond preparation, water quality management, and feeding management. The selected seedling pond has an area of ​​1,500 square meters and a pond wall height of 130 centimeters. The seedling pond is first prepared, and the water depth of the prepared seedling pond is controlled to be 55 centimeters. One day before the loach seedlings are placed in the seedling pond, four basins of water are taken from the seedling pond, and four loach seedlings are placed in each basin of water. The water is observed for 14 hours. When the loach seedlings in each basin of water survive normally, the loach seedlings are placed in the seedling pond for cultivation. Loach seedlings hatched on the same day are placed in the seedling pond, and the stocking density of the loach seedlings is controlled to be 550 per square meter. After the loach seedlings are placed, duckweed is placed in the seedling pond after the loach seedlings are placed in the seedling pond. After the loach seedlings are placed in the pond, effective microbial agents are placed in the seedling pond, and the mass ratio of the effective microbial agents initially added to the water in the seedling pond is controlled to be 1:1,100,000. Thereafter, effective microorganisms are added again every 7 days. Bacterial agent, the mass ratio of the effective microbial agent added again to the water in the seedling pond is controlled at 1:6000000, the water quality of the seedling pond is managed and the loach seedlings in the seedling pond are fed until the loach seedlings reach 4 cm in length. The breeding method maintains clean water quality by tidying the seedling pond, controlling the water depth and stocking density, and managing the water quality of the seedling pond, thereby providing a good growth environment for the loach seedlings, reducing the possibility of death of the loach seedlings, and improving the survival rate. The breeding method performs water quality management and feeding management. Good water quality and reasonable feeding management can provide sufficient oxygen and nutrition, promote the accumulation of protein and fat in the loach seedlings, make the loach seedlings stronger, and at the same time, promote the growth of the loach seedlings, thereby shortening the breeding period of the loach seedlings. By increasing the growth rate, a large number of loach seedlings can be obtained in a shorter time, thereby increasing breeding income;

[0041] Among them, the seedling pond preparation: clean and disinfect the seedling pond, and then apply base fertilizer to the seedling pond. The specific steps of seedling pond preparation are:

[0042] Step 1: Use clean water to soak and rinse the seedling pool 4 times and drain the pool water;

[0043] Step 2: Spray quicklime for disinfection, and control the amount of quicklime to 110 grams per square meter;

[0044] Step 3: 36 hours after spraying quicklime, spray bleach solution for secondary disinfection. The concentration of bleach solution is controlled at 15 mg / L.

[0045] Step 4: After 8 days of spraying and disinfecting with bleach solution, rinse the seedling pond twice with clean water and add new water;

[0046] Step 5: The base fertilizer applied to the seedling pond is controlled at 1.5 kg per cubic meter. After fertilization, it is left for 7 days to make the water in the seedling pond turn yellow-green. The base fertilizer applied is organic fertilizer, which is made from cow dung, pig dung, chicken dung and duck dung through decomposition and fermentation. After 6 days after the loach seedlings are put into the pond, base fertilizer is added to the seedling pond every 6 days. The base fertilizer added to the seedling pond is controlled at 0.4 kg per cubic meter. By cleaning and disinfecting the seedling pond and applying base fertilizer, the bacteria, viruses and other pathogens in the seedling pond can be killed, and the occurrence and spread of diseases can be effectively prevented. At the same time, the invasion of loach seedlings by bacteria, viruses and other pathogens can be reduced, the immunity of loach seedlings can be improved, and the incidence rate can be reduced. Applying base fertilizer can cultivate plankton such as rotifers, spirulina and ciliates, which can serve as food for loach seedlings. On the one hand, it can increase the diversity of loach seedlings' food, so that loach seedlings can obtain richer nutrition, and make the loach seedlings grow and develop better. On the other hand, it can reduce the loach seedlings' demand for artificial bait, thereby reducing the input cost of artificial bait in the process of loach seedling cultivation, so that the economic benefit of cultivating loach seedlings by this cultivation method is higher. On the other hand, eating plankton can increase the amount of exercise of loach seedlings, increase the activity of loach seedlings, and thus improve the survival rate of loach seedling cultivation.

[0047] Water quality management: After the loach seedlings are raised in the pond for 10 days, new water should be added to the seedling pond every 6 days. At the same time, the water injection height should be controlled at 14 cm each time. After injection, the water depth of the seedling pond should be controlled at 50 cm. Adding new water to the seedling pond every 6 days can keep the water fresh and effectively reduce the concentration of harmful substances and metabolites in the water quality. After each water injection, the water depth of the seedling pond should be controlled at 14 cm to avoid the water depth being too shallow or too deep, which is conducive to the activities and foraging of loach seedlings and also helps to stabilize the water quality. Regular injection of new water and control of the water level can maintain the water quality in the loach seedling pond in good condition, provide a good living environment, and promote the healthy growth of loach seedlings.

[0048] Feeding management: 6 days before the loach fry are put into the pond, grind soybeans into soy milk and feed them. Sprinkle soy milk into the fry pond twice a day. The time interval between soy milk feeding is controlled at 6 hours. The amount of soybeans used in each soy milk feeding is controlled at 4.2 grams per square meter. 6 days after the loach fry are put into the pond, stop feeding soy milk and switch to feeding artificial mixed feed. Feed the fry pond twice a day with artificial mixed feed, which consists of fish meal, shrimp meal, soybean meal, wheat flour and bone meal. The feeding method of artificial mixed feed is as follows: : Soak the artificial mixed bait in baking soda solution and stir it to make it into a paste. Sprinkle the paste-like artificial mixed bait along the edge of the seedling pond. The ratio of fish meal, shrimp meal, soybean meal, wheat flour and bone meal in the artificial mixed bait is controlled at 6:2.5:24:45:4, and the concentration of baking soda solution is controlled at 0.3%. The time interval for feeding the artificial mixed bait is 10 hours, and the amount of artificial mixed bait used each time is controlled at 3.8 grams per square meter. After feeding for 6 days, stop feeding for one day. The taste of soy milk is relatively strong. Feeding with soy milk first can stimulate the appetite of loach and promote its food intake. In addition, soy milk is rich in nutrients such as protein, carbohydrates and minerals, which can provide the nutrients needed by loach seedlings and help them grow healthily. During the feeding period of loach seedlings, do not feed them for one day. On the one hand, after one day of not feeding, the gastrointestinal tract of loach seedlings can rest and adjust, which helps to improve the food digestion and absorption capacity of loach seedlings, thereby enhancing their growth ability. On the other hand, stopping feeding for one day allows the loach seedlings to eat more actively in the next feeding cycle, which can promote the appetite of loach seedlings, thereby increasing their ability to absorb nutrients and promote growth. In addition, stopping feeding for one day allows the surplus bait in the seedling pond to be consumed, effectively avoiding excessive bait accumulation in the seedling pond, thereby reducing bait waste and at the same time, reducing water pollution and keeping the water clear and transparent.

[0049] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A loach seed breeding method, characterized in that: The breeding method includes arranging the seedling pond, managing water quality, and managing feeding. The seedling pond is first arranged, and the water depth of the arranged seedling pond is controlled to be 40-60 centimeters. Loach seedlings hatched on the same day are placed in the seedling pond, and the stocking density of the loach seedlings is controlled to be 450-600 per square meter. After the loach seedlings are placed, the water quality of the seedling pond is managed, and the feeding of the loach seedlings in the seedling pond is managed until the loach seedlings reach a body length of 3-5 centimeters. Among them, seedling pond preparation: cleaning and disinfecting the seedling pond, and then applying base fertilizer to the seedling pond; Water quality management: After the loach fry are raised in the pond for 7-15 days, add new water to the fry pond every 5-7 days. At the same time, the water filling height is controlled at 12-15 cm each time. After filling, the water depth of the fry pond should not exceed 60 cm. Feeding management: 5-7 days before the loach seedlings are put into the pond, grind the soybeans into soy milk and feed them. Sprinkle the soy milk into the seedling pond twice a day. The time interval between soy milk feeding should be greater than 6 hours. The amount of soybeans used in each soy milk feeding should be controlled at 3.5-4.8 grams per square meter. 5-7 days after the loach seedlings are put into the pond, stop feeding soy milk and switch to feeding artificial mixed bait. Feed the seedling pond twice a day with artificial mixed bait. The time interval between feeding artificial mixed bait should be greater than 8 hours. The amount of artificial mixed bait used each time should be controlled at 3-4 grams per square meter. Stop feeding artificial mixed bait for one day after every 5-7 days of feeding.

2. A loach seed breeding method as claimed in claim 1, characterized in that: The selected seedling pond area is 600-2000 square meters, and the pond wall height is 100-140 cm.

3. A loach seed breeding method according to claim 1, characterized in that: The specific steps for preparing the seedling pond are: Step 1: Use clean water to soak and rinse the seedling pool 3-5 times, and then drain the pool water; Step 2: Spray quicklime for disinfection, and control the amount of quicklime per square meter to 90-120 grams; Step 3: After spraying quicklime for 24-48 hours, spray bleach solution for secondary disinfection. The concentration of bleach solution is controlled at 10-18 mg / L. Step 4: After 7-9 days of spraying and disinfecting with bleach solution, rinse the seedling pond 1-2 times with clean water and add new water; Step 5: The base fertilizer applied to the seedling pond should be controlled at 1-2 kg per cubic meter. Leave it for 5-8 days after fertilization to make the water in the seedling pond turn yellow-green.

4. A loach seed breeding method according to claim 1, characterized in that: After the loach fry are released into the fry pond, duckweed is added into the fry pond.

5. A loach seed breeding method according to claim 1, characterized in that: The artificial mixed bait is composed of fish meal, shrimp meal, soybean meal, wheat flour and bone meal. The feeding method of the artificial mixed bait is as follows: soak the artificial mixed bait in baking soda solution, stir it to make the artificial mixed bait into a paste, and sprinkle the paste-like artificial mixed bait along the edge of the seedling pond.

6. A loach seed breeding method according to claim 5, characterized in that: The ratio of fish meal, shrimp meal, soybean meal, wheat flour and bone meal in the artificial mixed bait is controlled at 5-10:2-5:20-30:40-50:3-7, and the concentration of baking soda solution is controlled at 0.2%-0.5%.

7. A loach seed breeding method according to claim 1, characterized in that: After the loach seedlings are put into the pond, effective microbial agents are added into the seedling pond. The mass ratio of the effective microbial agents added for the first time to the water in the seedling pond is controlled at 1:1000000-1500000. After that, effective microbial agents are added again every 3-8 days. The mass ratio of the effective microbial agents added again to the water in the seedling pond is controlled at 1:5000000-9000000.

8. The loach seedling cultivation method according to claim 3, wherein: The base fertilizer applied is organic fertilizer, which is made from decomposed and fermented cow dung, pig dung, chicken dung and duck dung. 3-7 days after the loach seedlings are put into the pond, base fertilizer is added to the seedling pond every 5-7 days. The base fertilizer added to the seedling pond is controlled at 0.3-0.6 kg per cubic meter.

9. The loach seedling cultivation method according to claim 1, wherein: The day before putting the loach fry into the fry pond, take 3-5 basins of water from the fry pond, put 3-5 loach fry into each basin of water, observe for 10-15 hours, and when the loach fry in each basin of water are surviving normally, put the loach fry into the fry pond for cultivation.