What should I pay attention to when carrying out aquaculture in the season when the temperature is l

Thorough disinfection of ponds is an indispensable and important part of the breeding process, and should be given great attention. Quicklime disinfection is often used in production, and the main advantages are that it can eliminate a variety of pathogenic bacteria and harmful organismsImproving the water environment;Good for fish growth.

The individual size, density and matching species of fingerlings stocking are mainly directly related to their own management level, feeding methods, time of ponding and the requirements and specifications of commercial fish. Key points: The same batch of fish is required to be as neat as possible, but also have an appropriate density, and the variety matching should be reasonable.

The feeding habits of the main fish and the secondary fish are different to make full use of the water space and bait resources.

1 Seed transportSpring is also the season for stocking fish fry, and the transportation of fish fry has become an important part of aquaculture production. Transportation should be safe and efficient, and the survival rate of transportation should be guaranteed and improved. When transporting seedlings, attention should be paid to making a thorough transportation plan before transportation, and preparing tools and drugs for loading and unloading, transporting, and disinfection.

The transportation density should be determined according to the type, size, water temperature, water quality, transportation time, transportation method and oxygen supply equipment of the fish. It is advisable to choose a sunny day with low temperature to transport fish fingerlings, and the fish should be stopped before shipment.

2. Preparation before stockingBefore the fry go down to the pond, check whether the effect has passed after clearing the pond, the water temperature is low in early spring, and the toxicity disappears slowly, so the water should be taken in advance and put the experimental fish for testing.

3 Pay attention to the temperature differenceWhen going down to the pond, pay attention to the temperature difference between the water in the fish fry container and the pond water is not too large, so as to avoid stress reaction, especially for small-sized fry, which is easy to cause death.

4 DisinfectionPractice has proved that timely disinfection of purchased fish fry can effectively prevent the occurrence of fish diseases. The temperature is low in early spring, and it is inevitable that the fry will have trauma during transportation, loading and unloading, and it is easy to get mildew if it is not disinfected in time. There are three things to pay attention to when disinfection:

Drugs should be prepared and used at the ready;The dosage of the drug should be accurate and avoid underdosing or overdosingThe soaking time should be appropriate, and when the fish species are found to be unbearable, water should be added or put into the pond immediately.

After the water level of the pond is properly raised, it is necessary to strengthen the inspection situation, strengthen the feed management, and do a good job in the management of water quality at the same time as scientific feeding, so as to avoid the expansion of pollution.

It is necessary to pay attention to the temperature, pay attention to the humidity, but also pay attention to the usual environment, but also pay attention to the disinfection of the environment, but also pay attention to the degree of ventilation of the air, so that aquaculture can be carried out.

Raise the water level in ponds and rice paddies Why? Because after raising the water level of ponds and rice fields, the water body can play a role in heat preservation and reduce the occurrence of frost damage. If there is already freezing due to low temperatures, it is necessary to dispose of the ice on the surface of the water in time and re-inject new water to increase the oxygen capacity of the water.

Do a good job of inspection and monitoring Usually inspect the mental condition of the fish and shrimp in the pond and rice field in time to see if there are dead fish on the water surface, and once found, it should be dealt with in time and fished out, so as not to pollute the water quality and the healthy fish will be infected with diseases.

1. Prevent shallow water.

In winter, the water level in the fish pond is shallow, the water temperature changes quickly, and the temperature difference is large, which will bring disadvantages to the growth of the fish.

2. Prevent hypoxia.

Under normal circumstances, after entering the winter every year, the phenomenon of pond aquaculture in the flood pond is significantly reduced, which is significantly less than that in the summer and early autumn high temperature season. However, some ponds also have pan-ponds in winter, such as fish from fertilizer ponds, fish from deep-water ponds, and fish reared in cages. In these cases, fish often suffer from hypoxic floating heads in winter due to neglect of management, and even die severely, causing great economic losses to fish farmers.

The reason is that when the temperature drops, the surface water temperature of the water area of deep-water, fertilizer water and cage high-density aquaculture is lower than that of the lower water, and its specific gravity is also larger than that of the lower water, resulting in the sinking of the cold water on the surface, and the floating of the warm water in the lower layer, forming the vertical convection of the water body. The water body of the deep water layer is hypoxic or even anaerobic, and the hypoxic and oxygen-free water body floats up, which will cause the upper water body to be seriously hypoxic. At the same time, this vertical movement of the water body accelerates the oxidative decomposition of organic matter such as bait and feces deposited at the bottom of the pond, and increases the oxygen consumption inside the water body.

In addition, there is less sunlight in winter, the photosynthesis of phytoplankton in the water is weak, and the oxygen produced is insufficient, which often causes the lack of dissolved oxygen in the breeding environment, coupled with the large density of fish, so it is easy to appear hypoxic floating head and even die.

4. Anti-freeze damage.

Cold winters often cause frost damage to overwintering fingerlings, so how can this be prevented? There are several ways to avoid cold and warming:

1) Set up barriers to avoid hazards, use wooden bamboo sticks to drive piles around woven bags or straw straw on the north side of the fish pond, and set up artificial barriers to resist the north wind.

2) Apply manure to raise temperature, and apply about 500 kg of livestock and poultry manure per mu of water surface. The principle of fermentation, decomposition and release of heat from fertilizer is used to increase the water temperature.

3) Smoke to make warm, every day when the north wind is howling is the precursor of frost at night, wet straw and firewood can be piled up on the shore of the fish pond to make a fire and smoke to create a warm atmosphere and reduce the degree of frost.

4) Put aquatic weeds, put a certain amount of aquatic weeds into the fish pond in winter, so that the fish can warm up in the grass and drive away the cold.

5) Inject water to increase temperature, and inject shallow water heated by sunlight into the fish pond in the afternoon on a sunny day with high temperature.

1. Strengthen water quality control. In summer, plankton reproduce rapidly, water quality is easy to deteriorate, sudden weather is easy to cause water quality deterioration or hypoxia, and algal toxins will cause poisoning of farmed animals, which are not conducive to normal breeding.

2. Feed the bait reasonably. According to the breed and characteristics, in accordance with the "four fixed" feeding, the specific should be flexibly mastered, according to the weather, water quality, the activities of the breeding object, the time of eating, the amount of bait left to adjust in time.

3. Turn on the aerator in a timely manner. In the summer environment, the oxygen consumption of all organisms reaches the maximum, if the control is not proper or poorly managed, it is very likely that a large area of floating head or flooding pond will occur, resulting in unnecessary losses, and the time of turning on the aerator must be scientifically determined.

1.Before breeding, the bottom of the pond should be ploughed and sunburned, and quicklime and bleaching powder should be used to clean the pond.

2.Choose high-quality seedlings. Stocking the seedlings that have passed the quarantine, strictly controlling the seedlings, and preventing the seedlings carrying the virus from entering the breeding pond from the source to reduce the risk of disease.

3.Control the breeding density, feed high-quality feed, a small amount of many times, and eliminate overfeeding. "Staling" can induce food to promote growth, protect the liver and gallbladder and enhance intestinal immunity, adding Staling in the feed can not only promote the healthy growth of breeding varieties, but also reduce the cost of breeding, and truly achieve "green and healthy aquaculture of aquatic products", which has been successfully applied in many places

4.Water quality should be regulated in time before and after extreme weather such as temperature drastic changes, typhoons, and heavy rains. During the low water temperature period, it is strictly forbidden to pull the net and stocking operations.

"Youjiling" can complex toxins, enhance anti-stress ability, stabilize algae phase, etc., and has long become an important tool for many farmers to regulate water quality and cultivate seedlings

5.Strengthen pond patrols, fish and shrimp that are sick and dead in a timely manner, and carry out harmless treatment such as centralized disinfection, deep burial or incineration, etc., to prevent the spread of diseases.

6.Strengthen disease surveillance, achieve early detection, rapid disposal, prevention of spread, and control of hazards.

In summer, disease and water quality are common problems that farmers can not escape, and only by taking scientific, reasonable and effective response measures and maintaining a good attitude can we avoid suffering major losses and finally achieve a bumper harvest.

In the summer high temperature to start from the water level, to ensure that the high temperature during the water level to lower a little, but also to add an appropriate amount of new water, control the water quality of the pond to feed them more bait.

In order to properly raise the water level of the pond, we must regulate the water quality of the pond, and then flexibly put bait, use the aerator correctly, and prevent the outbreak of diseases.

1. The temperature is low in winter, and the most feared is frost damage, so you can set up a windshield wall on the northwest side of the pond, and use wooden stakes to enclose woven bags or straw, which can prevent the north from blowing and causing the water temperature to drop rapidly. In the sign of frost, wet straw and firewood can be piled up on the shore to make a fire and smoke to reduce the frost damage. You can also plant certain aquatic plants in the pond, which can make the fish and shrimp overwinter in the aquatic weeds to reduce the impact of low temperatures, and can also inject new water in the afternoon on a sunny day to increase the water temperature.

2. It is not suitable to flush in the evening in winter because of the principle of anaerobic bacteria fermentation at the bottom of the pond, if you open the aerator at this time or flush the water in the evening, the water layer at the bottom will be mixed because of the lack of oxygen, and the evening flushing will make the upper and lower water layers mixed, making the whole pond hypoxic, causing great harm to fish and shrimp, so it is not suitable to flush in the evening.

3. Properly feed the temperature in November at 20 degrees, which is the vigorous growth of freshwater fish and shrimp, and provide them with sufficient natural bait, which can not only keep fat and fat, but also lay the foundation for freshwater fish to survive the winter. Feeding should follow the standard of "regular, precise positioning, qualitative and quantitative analysis", and the feeding amount should be flexibly controlled according to the temperature, water body and fish and shrimp feeding. The bait should have a full range of nutritional value, strong deliciousness, freshness and no mildew, so as to ensure that the fish and shrimp are well fed and well-fed, and do not cause waste and pollute the water body.

4. Disinfection and bottom change before the fish fingerlings go to the pond, it is necessary to disinfect the body surface, you can take a medicated bath for 5 minutes, and after going down the pond, use Stress Ling for two consecutive days for anti-stress treatment. After a year of breeding in the pond in winter, a lot of residues and feces will be deposited at the bottom, and anaerobic fermentation will produce toxic gases, which will cause serious toxicity to fish and shrimp.

The first point of portable breeding must pay attention to the temperature of the whole must be mastered, the second category must also master the cleanliness, this management is very important, the third point, but also pay attention to the process of breeding what pests and diseases should be dealt with in a timely manner.

We must pay attention to monitoring and treatment, pay attention to the content of oxygen, so that we can better solve the problem, and pay attention to the disinfection treatment.

Before stocking, the pond collapsed, the pond ridge and the inlet and drainage channels must be thoroughly remediated. After that, 60 75 kg of quicklime and 60 kg of tea bran were used per mu, broken and soaked in water for 48 hours, and then the whole pool was sprinkled. According to the local bait and water quality conditions, the main species are determined.

If aquatic grasses and dry grasses are abundant, it is advisable to raise grass carp and bream; If the fertilizer source is sufficient, you can mainly raise silver carp, bighead carp, crucian carp and tilapia; In the waters where there are many snails and clams, herring and carp can be mainly raised. The amount of stocking depends on the pond conditions and the level of feeding management, intensive fish ponds are generally stocked with 1500 2000 fish per mu, and extensive fish ponds are stocked with 500 fish per mu and 1000 fish. In order to increase the yield per unit area, reasonable polyculture of multiple species and multiple specifications should be implemented.

In early spring, the temperature is low, the fry activity is less, and it is not easy to be injured in the process of fishing, transportation and stocking, and the survival rate of the fry is high; Generally, it is most advantageous to place in mid to late March. Efforts should be made to select fish species of the same age that are neat, well-developed, bright in color, robust in physique, active in swimming, strong against water and intact in body scales.

1. Raise the pond appropriately. Why? Because after raising the pond and water level, the water body can play a role in heat preservation and reduce the occurrence of frost damage.

If there is already freezing due to low temperature weather, it is necessary to dispose of the ice on the water surface in time, and then re-inject new water to improve the oxygen capacity of the water body, so as to prevent the fish and shrimp in the water from dying collectively due to lack of oxygen. If the number of cultures is relatively large, it must be equipped with an aerator to increase the supply of oxygen. If the water temperature is too low, it is not recommended to fish during this period to avoid the fish and shrimp from getting sick due to wounds.

2. Do a good job of inspection and monitoring. Usually inspect the pond and the mental condition of the fish and shrimp in time to see if there are dead fish on the water surface, and once found, it should be dealt with in time and fished out, so as not to pollute the water quality and the healthy fish will be infected with diseases. After that, disinfect the water to reduce the occurrence of diseases.

In addition to observing the dynamics of the fish, it is also necessary to check the operation of various equipment every day, because if there is a little error, it will affect the healthy growth of the fish.

3. Scientific feeding. In the winter when the temperature is relatively low, it is necessary to feed bait scientifically, generally to enhance the physique of the fish, you need to feed some concentrate feed when the temperature rises slightly, and you can also add some nutrients, proteins, vitamins and so on to enhance the nutritional intake of the fish. It is normal for aquatic animals to forage less often when the temperature is too low, as the metabolism level of the fish decreases.

During this period, it is necessary to reduce fishing, reduce the frequency of feeding, and if there is too much food left in the water, it should be fished out in time to avoid polluting the water quality. In the early stage of winter, that is, in late autumn, it is necessary to moderately feed to increase fattening and fattening to resist the cold, but it is not possible to add contraband, which is not in line with the development of breeding. Because as a farmer, you must abide by the law, have professional ethics, and cannot do wrong things for your own selfish interests.

4. Pay attention to weather changes in advance and do a good job in disease prevention and control. Keep an eye on the daily weather so that you don't have to deal with the cold spell and you don't get scramble. Disease detection and prevention and control should also be carried out at ordinary times, so as not to affect the aquatic organisms in the entire pond during the outbreak of the epidemic.