CATDOLL : CATDOLL: If you want to use silver carp cage farming technology to breed silver carp, what issues should you pay attention to during the actual operation?

If you want to use silver carp cage farming technology to breed silver carp, what issues should you pay attention to during the actual operation?

Silver carp cage culture is a three-dimensional culture technology that makes full use of reservoir resources. Its advantages are low cost and high efficiency. There is a large profit margin, which is conducive to the improvement of economic benefits. Let me introduce some technical points to you.

First, pay attention to the structure of the cage frame. Most cages are made of polyethylene with a diameter of 1.13mm, a mesh size of 3~5cm, and a cage size of 4m×7m×2m. Use a single-layer frame, and the frame is a bamboo pole with a diameter of about 10cm. Multiple cages are connected together to fix the water tank and avoid drifting.

The layout of the cage will affect the growth rate of catfish. Generally speaking, the cage needs to be placed in a relatively wide water body, the water body should not be too large, the water quality should be good and pollution-free. It needs a reservoir with sufficient sunshine, leeward, sufficient sunshine, high water temperature, sufficient bait, 4-7m water depth and convenient transportation.

November to December or February to March is the best time to stock cages. The water temperature is lower at this time, which is less harmful to fish and has a higher survival rate. The breeding scales are 80g and 350g respectively. If the stock is 80g, there are 450 to 550 fish per box. If the stock is 350g, the number of fish per box is 200 to 250. Disinfect the fish before releasing to prevent them from getting sick and dying in the fish tank.

Good breeding and management are essential for fish farming. The quality of breeding is directly related to the success of breeding. With reasonable feeding and management, silver carp grows rapidly, has low mortality and good benefits. If it is not managed properly, the growth of catfish will slow down, and the morbidity and mortality will be high. Therefore, attention should be paid to cage fish farming and management. If the fish is placed in a new cage, it should be soaked in water 7-10 days in advance to prevent the rough surface of the new cage from injuring the fish. When the cage is placed in the reservoir, a lot of dust will adhere to the cage due to the action of plankton, which will reduce the amount of plankton in the cage and cause insufficient feed for silver carp. Therefore, the cage needs to be cleaned frequently, usually every 15 to 20 days.

During the cage culture process, the cages should be moved according to the actual situation. In order to prevent the cages from being washed away during the flood season, it is necessary to move the cages. Moving the cages can also increase the biological content of erbium in the cages and increase the growth rate of catfish. Although catfish feed on plankton, when the water body is too thin or there are too many nets, it is necessary to increase the biomass of the bait net to provide sufficient bait for silver carp and increase the growth rate of catfish.

The daily management of captive silverfish also needs to be taken seriously. Check the cages frequently, observe the activities of catfish, and find problems in time. The above are the key points of catfish cage farming operation technology for your reference and learning.

The size of the cages should be determined based on the area of ​​the aquaculture waters. The cages can be set in medium to large water environments with relatively slow water flows, such as lakes and the lower reaches of rivers.

It is necessary to pay attention to the water temperature for breeding silver carp, the fish in the reservoir, the fish breeding methods, the fish storage process, and the health of the feed. These are all issues that need to be paid attention to when breeding fish.

During the actual operation, you should pay attention to preparing oxygen generators and disinfectants, ensuring the water quality is clear, and having surplus bait and feed.

How to fertilize water in silver carp farming? What is the purpose of fertilizing water?

Silver carp and bighead carp are our common filter-feeding fish species. Although under the premise of artificial feeding, they also eat the bait fed by us. However, silver carp and bighead carp, whether they eat artificial concentrated feed or natural bait, their growth rate, disease resistance, and the quality of the fish produced are completely different. In other words, after silver carp eats natural bait, not only does it grow faster, but also has stronger disease resistance, and the quality of the fish produced is also better.

Applying chemical fertilizers is the simplest method, but the disadvantage is that the fertilizer effect is short-lived. Chemical fertilizers are generally based on base fertilizers, supplemented with phosphorus, potassium and potassium fertilizers. One acre of land needs about 5 kg of nitrogen. Calculated with urea with a nitrogen content of about 40%. In this way, about 12 kg of urea needs to be applied to one acre. Fertilizer application should be done in the morning on a sunny day. When applying, the fertilizer should be fully dissolved and sprayed throughout the pond. This is more beneficial to the zooplankton in the pond.

Silver carp's main bait is liquid fertilizer, which is used to feed the reproductive system. For example, the fertilizer source of the bay front pond is very rich. Fertilizer is added to the water body, and the organisms reproduce a lot, which provides silver carp with sufficient bait. Therefore, most of the bay front ponds are rich in water and strong in fish, and the production is high. However, independent fish ponds and remote fish ponds do not have such good liquid fertilizer conditions. To raise fish well, it is necessary to fertilize the water surface to achieve the conditions for breeding microorganisms. Thin water fertilization mainly uses fermented human and animal feces as the main material, and is applied regularly, according to the weather, and quantitatively. A certain amount of chemical pesticides can also be added.

Phosphorus and potassium fertilizers can be mixed with base fertilizers at a ratio of 1:0.5, that is, 0.5 parts of potassium nitrate with 14% nitrogen and 1 part of phosphorus fertilizer. In order to ensure long-term water abundance, fertilization should adhere to the principle of less application and more application. Generally, less application in spring and autumn, and topdressing in summer; topdressing on sunny days, less application on cloudy and rainy days, and application in ponds with too much fertilizer; no application when fish activities are not normal. Fertilization and base fertilizer are closely combined to provide fish with a good growth environment. In addition, phosphorus and potassium fertilizers should be applied skillfully. Phosphorus deficiency in water quality is one of the key factors leading to low fish production.

Silver carp is a fish that lives in the middle and upper layers of the water. It mainly filters microorganisms, water debris, and artificial feeding bait. The main bait of silver carp is to feed and reproduce with fertilized water. For example, the fertilizer source of Wanqian Pond is very rich. The water quality is fertilized, and microorganisms multiply in large numbers, providing silver carp with sufficient bait. Therefore, most of the water in Wanqian Pond is fertile and strong, and the yield is high. However, independent fish ponds and remote fish ponds do not have such good fertilized water conditions. If you want to raise fish well, you must fertilize the pond water to cultivate the conditions for the reproduction of microorganisms. Thin water fertilization is mainly based on decomposed human and animal manure, which is applied regularly, according to the weather, and in a quantitative manner. A certain amount of chemical fertilizers can also be added. After fertilization, it is necessary to patrol the pond regularly, check the fish situation, and change the water in time. According to the different characteristics of various fertilizers, in the process of fish farming, the purpose of mixing inorganic fertilizers with organic fertilizers is mainly to make up for the shortcomings of the land slide, show their strengths, keep the water fertile, and achieve accelerated reproduction of microorganisms and rich dissolved oxygen content.

The fertilizer used should preferably have a high organic matter content, preferably organic fertilizer mainly composed of fermented chicken manure, followed by amino acid fertilizer with amino acids as the main component. Ponds that mainly apply chemical fertilizers provide fish with an ecological environment with high dissolved oxygen, low oxygen consumption, and rich bait. For ponds and tung ponds that mainly raise silver carp, applying chemical fertilizers is a mature experience worth promoting. It is generally believed that ponds with relatively fertile bottom mud should apply 10 kilograms of carbon amine and 5 to 10 kilograms of superphosphate per mu each time, and the shed should be changed once a week. For thin or newly excavated fish ponds, nitrogen should be appropriately increased.

Applying chemical fertilizers in silver carp farming is the simplest way to fertilize the water. The purpose of fertilizing the water is to make the silver carp grow better.