Carp pond culture technology

Squid commonly known as osmanthus fish, mandarin fish, sweet-scented osmanthus osmanthus, etc., many species, the current breeding of alfalfa varieties is mainly Alice. Although the history of artificial breeding of eel is relatively long, it is understood that many farmers have failed to breed every year, resulting in greater economic losses. The reason for this is mainly due to the fact that eel farming techniques have not been mastered, or the technical requirements have not been met. . The following is a brief introduction to the technology of carp pond culture:
First, strict clear pond disinfection
1. Pond conditions The cultivation of eel fry and the size of the rough pond area should be 2-4 mu. The water depth should be 1.5-2.0 meters. The area of ​​4-6 mu of pond should be suitable and the water depth should be 2.0-2.5 meters. Both require the ponds to be sunny and ventilated, with no landslides at the bottom of the pond, a gentle bottom at the bottom of the pond, a sandy mud bottom, a silt thickness of no more than 30cm, sufficient electricity, access, sufficient water supply, no pollution, and easy drainage and irrigation.
Trout farming ponds need to implement "rotation", that is, the fish ponds that had been farmed for trout last year. In the coming year, they will be used for breeding other species. They are not used for breeding clams, but other fish ponds should be selected for clam farming. It has been proved that the ponds that raise the earthworms carry out “rotation”, which can reduce the occurrence of earthworm diseases in the breeding process.
2, clear pond disinfection clear pond disinfection is best to use lime with bleach, dry clear pond. 100-125 kilograms of lime per acre, plus 5-10 kilograms of bleach, the bottom of the pool and the pond around the four evenly spilled, the bottom of the pool with wooden turbulence, so that the drug into the mud. Re-exposure to the bottom of the pool, until the flowering cultivation of "paste bait fish" about 2 days before the water injection into the pond. Through disinfection, viruses, bacteria, parasites, benthic organisms, and aquatic insects in the pond can be killed, creating a good ecological environment for alfalfa breeding.

Second, the appropriate food bait fish matching
1, the appropriate feed bait fish pond pure feed bait coefficient is 3.5-6, usually about 4.5. In the early (May-April) season, carp species had a fast growth rate and short aquaculture cycle, and developed a commercial fish with a low feed coefficient of 3.5-4.5. Late carp species (after July) grew slowly. Long breeding cycle, develop commercial fish, feed coefficient is higher, the highest up to 6 or more. The level of the bait coefficient is also related to the type of bait fish. For carp and silver carp as babbler fish, the bait coefficient is generally low, and baitfish, wheat bran, etc. are baitfish, and the bait coefficient is higher. This requires farmers to do a good plan for bait fish to ensure that there are sufficient palatability bait fish throughout the breeding cycle from seedlings to commercial fish.
In order to avoid infestation of alien diseases, conditional farmers, preferably the bait fish needed for the breeding process, are all cultivated. The ratio of fish ponds in farmed clams to fish ponds in farmed feed fish is generally 1:4.
Before breeding fish species, farmers should at least cultivate two pond bait fish and “open bait fish”. Breeding households of early quail farmers also need to reserve a certain amount of “three autumn crickets” (collectively known as winter bream fish species of carp, wild pheasant and wheat bran).
2. Breeding of open-baited fish. Prepare fresh-water, fertilizer and water in stocked fish ponds, and stockpiling “spray” 10-15 days before the eel ponds. The bait fish cultivated is used as a catfish pond. "Open bait fish" (about 3cm of salmon species). Early (May-May) water temperature is low, and it takes longer to cultivate "open bait fish". Generally it takes about 15 days to cultivate to 5-5.5 dynasty (1.8-2cm); in the middle and late period (after June), the water temperature is high. The time for cultivating "open bait fish" is shorter, and generally it can be cultivated to 5-5.5 dynasty (1.8-2cm) in about 10 days. Breeding "open-baited fish", with early pupa and carp flowers as the main, the stocking capacity of mu is 100-1,500,000; in the middle and later period, the main plants are earthworms, wheat buckwheat and wild pheasants. The mu stocking amount is 200-250. Million.
3, the standard tadpole fish bait fish breeding process, the bait fish should be fed by a healthy, disease-free, neat specifications, length is about 2/5 of the total length of tadpoles. The palatability of the baitfish should be small and not too large. The use of small-sized bait fish can take full care of the individual's small calf's feeding, making the developed products more consistent in specification and higher in commodity value. The use of larger-sized bait fish can cause gastroenteritis and can even be swallowed. The matching specifications of bait fish in the adult larval rearing process are shown in Table 1 below:
Table 1
Full length (cm) 4-14 15-20 21-25 26-30 31-35
The full length of bait fish (cm) 2-6 6-8 8-10 10-12 12-15
4. Feeding of bait fish (1) Strictly sterilized bait before feeding The fish must undergo strict disinfection and insecticidal treatment before feeding. For the bait fish they cultivated, two days before preparing the pond for feeding, the whole pond was sputtered with copper sulfate or formalin at concentrations of 0.7 ppm and 20 ppm, respectively; the bait fish purchased had 100-150 ppm of formalin. Bath for 10-15 minutes and feed again.
(2) Feeding standard diets for bait fishes. The standard period for fish feeding is 6-10 fish per day. It is advisable to eat 3-5d each time. In the growing season, the feeding amount should be determined according to the season and the intensities of feeding, and it is appropriate to cast more in summer and autumn, and less in winter and spring. Generally, the amount of food consumed in the next day is 5-12% of its body weight. Each feeding amount should not be too much, the summer and autumn feeding season is suitable for 5-7d, and it is suitable to eat in 7-10d in winter and early spring. In the morning and evening, the most vigorous food intake is observed. During these two periods, it is most appropriate to observe the feeding behavior of the squid. Through observation, the stock of the squid fish can be detected so that it can be replenished promptly.

Third, timely stocking and cultivation of salmon species
1. Timely stocking of carp species: Carp species with good quality, satiation, uniform size, neat specifications, wide body, large and obvious markings, bright body color, clustered underwater under natural conditions, clusters in groups, in addition to feeding When you swim fast, you don't swim at ordinary times. When you are static, the head tilts down and the tail handle bends. The rate of no deformity or deformity is less than 3%.
When the “open bait fish” cultivated in fish ponds stocked with carp species grows to 5-5.5 mm (1.8-2.0 cm), the 3 cm carp species are stocked. Two days before the stocking of fish species, the “open bait fish” must be sampled and tested. If parasites are found, insecticides should be disinfected. The specific method is to use copper sulphate or bismuth marin to pour the whole pond at a concentration of 0.7 ppm and 20ppm; if spore parasites are found, they cannot be used as "open bait fish." One day before the stocking of fish species, Kangfeng Chlorine Dioxide was splashed with 0.75 ppm.
2. Raising the standard crude (1) Cultivating the standard rough bream species After cultivating the rough standard, the larvae can be bred and screened separately to eliminate deformed and weak individuals. When the seedlings reach about 3cm, they can be marked. Acre stocking capacity is 6000-8000. After 25-30 days of cultivation, seed sizes generally reach 8-12 cm.
(2) Timely ponds When the seed size reaches the predetermined size, ie 8-12cm, select cool weather, catch fish species in time, filter specifications, eliminate deformed fish and weak individuals, and then use 3-5% salt water or use The 100-150ppm formaldehyde solution was transferred to adult fish ponds after 5-10 minutes.
When passing the pond, the bait fish in the pond must be palatable. Two days before the pond is passed, the bait fish in the pond must be checked. If there are parasites, the insects should be killed first. The method is the same as above. One day before the stocking of fish species, Kangfeng Chlorine Dioxide was splashed with 0.75 ppm.
(3) Adult rearing stocking density
8-12cm large-size carp species, stocking 1200-1500 per acre is more appropriate. The pond for rearing commercial fish should be stocked with 100-150 squid and about 20-30 squid species of about 250 grams per gram.
(4) Equipped with aeration facilities, the amount of dissolved oxygen in the water above 4.5 mg/L can normally feed and grow, the dissolved oxygen is insufficient, the food intake is greatly reduced, and even the bait fish that have ingested into the stomach are spit out. The floating head appeared when the dissolved oxygen was below 2 mg/L. Feeding quail (including carp species), should be equipped with impeller type aerator with 0.4-0.5kw power per acre of water surface. Under normal circumstances, boot at noon 1-2 hours, midnight boot to the next morning after the sun comes out, bad weather and other special circumstances should be earlier boot and extend the boot time. In case of emergency, generator sets should be used for emergency purposes. If there are no conditions, a certain amount of chemical oxygenation agents such as calcium peroxide should be prepared.

Fourth, closed breeding and water treatment
1. Closed Breeding Closed-breeding means that during the aquaculture process, the whole breeding cycle is not changed, and it has been farmed until it is marketed. In places with poor water sources or in major culture areas, the implementation of closed pond culture of alfalfa ponds can effectively reduce the chance of disease cross-infection through water sources.
2, water treatment 鳜 live baited fish for food, and large food intake, water quality is very easy to deteriorate, ammonia nitrogen, nitrite is high, causing squid reduced food intake or not feeding, which led to decreased physical fitness, susceptible to diseases. Specific methods for regulating water quality include:
1, every 15-20d regular Quantang spill a quick lime, dosage of 1 meter per acre depth of 10-15kg;
2. Regularly sprinkle the zeolite powder in the whole pond every half a month, and the dosage is 20-25kg per 1 meter water depth;
3. Regularly sprinkle nitrite degrading agent in the whole pond every half a month, and use 1 package (500g/pack) per mu.
4, photosynthetic bacteria and other microbial agents, generally used once 15-20d, Quantang spill, each concentration of 4-5ppm.
Fifth, fish disease prevention and control of carp breeding process, from seedlings to adult fish, may be affected by pests and diseases.
1. Disease prevention and control shall adhere to the principle of prevention and prevention and control.
(1) During the trout farming process, the transparency of fishpond water should be kept within the range of 25-30cm, and the water quality should be medium, and it should always be fat, cool, tender and live, so as to create a good water environment for trout.
(2) Strictly handle the disinfection of bait fish.
(3) Correct diagnosis of fish disease. Once onset, do not abuse the fish medicine, take the diseased fish to the professional and technical personnel in a timely manner to diagnose, and under the guidance of professional and technical personnel, prescribe the right medicine.
(4) Scientific medication. Resolutely eliminate the use of illicit drugs (such as mercuric nitrate, malachite green, litulin, etc.) and high-toxicity, high-residue drugs, and use “three effects” (high-efficiency, fast-acting, long-lasting) “three small” (low toxicity, side effects Small, small amount of fish medicine, preferably with mild Chinese herbs.
2, common carp disease control methods:
(1) Trichomonas and Obliguate. It may happen throughout the year, and it is even worse from April to September. Therapeutics: 1 Use 0.7ppm of copper sulfate to splash the whole pond; 2 Use 18-20ppm of formalin to splash it.
(2) The ringworm disease. It may occur throughout the year, mainly causing damage to large-size fish species. Therapeutics: 1 Use 0.35-0.4ppm of the king of insects C Quantang spilled; 2 with 0.35-0.4ppm aphids net Quantang spill.
(3) Pigeon bean disease. It mainly occurs in the seedling stage, and is more common in May-July and is more harmful. Therapy: 0.7ppm copper sulfate + (1.2 ~ 1.5ppm) potassium permanganate whole pond splash.
(4) Gill disease. As a bacterial disease, it mainly occurs in April-November, and the peak period is in 5-10 months, causing great harm. Therapy: 1 Sprinkle with 1ppm bleaching powder in the whole pond, once every other day, 2 times in a row, with certain effect; 2 Sprinkle with Kangfeng chlorine dioxide, 1 meter per acre, once every other day, 2-3 times in succession, The effect is good.
(5) Bacterial hemorrhage. Occurs mainly from June to October and is rarely seen after November. It mainly harms the squid more than 10cm. Therapy: 1 with rot disease; 25ppm rhubarb, soaked in ammonia overnight, Jianshui whole pond sprinkling.
(6) Enteritis disease. As a bacterial disease, it mainly occurs from June to October, and it has a certain degree of danger. Therapy: Same as bacterial bleeding.
(7) Viral hemorrhagic sepsis. It mainly occurred in July-September and gradually decreased after October. The larvae, which are mainly susceptible to infection above 10 cm, are very dangerous and often cause the fish to die. At present, there are no better treatments, mainly prevention. At the beginning of the disease, Quan Tang was able to spill Kangfeng chlorine dioxide, 1 meter deep water per mu, and followed by 0.3ppm Povidone Iodine Sprinkle every other day.
In addition, the industry is now developed, air pollution is serious, and acid rain coverage is wide. Within a few days after each acid rain, there will be rancidity, bleeding, and other diseases, and it should be dealt with promptly. Specific treatment methods: Once the acid rain stops, immediately flood the whole pond Kangfeng chlorine dioxide, 1 meter deep water per acre, once every other day, twice, there is a good preventive effect.

Kangerjian round type LED Operating Light LED bulb from OSRAM ,do not engender infrared ray and ultraviolet radiation, it doesn`t have the temperature rise and tissue damage caused by halogen shadowless light, can accelerate the wound healing after surgery, and has no Radiation pollution

Variety of Surgical environment lighting mode: bright, normal, endoscopic lighting mode.

Round Type Operating Light

Round Type Operating Light,LED Surgery Light,Led Surgery Ceiling Lamp,Surgical Shadowless Lamp

Shandong qufu healthyou Medical Technology co.,Ltd , https://www.kangerjian-medical.com