Brief Analysis on Cautions of Silver Carp Culture

The model of raising silver carp mainly in large lakes and reservoirs

Once to release seeds, twice to catch silver carp species of about 0.3 jin ~ 0.6 jin per mu, about 70 fish per mu, about 50 fish per mu of 1.2 jin ~ 1.5 jin, large ones from July to August, and 20 ~ 30 silver carp per mu from October to December. Put a certain amount of crucian carp bottom fish, stocking time: before the Spring Festival.

At the end of the year, the stocking capacity of silver carp species is about 120 ~ 150 fish per mu with a stocking capacity of 0.3 jin ~ 0.6 jin per mu, and the fish will be caught by the end of the year. There are 20 ~ 30 silver carp per mu and a certain amount of crucian carp bottom fish.

The mode of cultivating silver carp mainly in medium-sized intensive water body (100mu ~ 1000 mu of intensive water body)

The ratio of silver carp, flower silver carp to food fish is 1:1. On the one hand, it can make full use of water resources to improve yield and benefit; on the other hand, it can control cyanobacteria bloom. the species size of silver carp is about 0.5 jin per tail, 1 jin per tail, 1.5 jin per tail and 40 silver carp species about 0.3 jin ~ 0.5 jin each. Put a certain amount of crucian carp bottom fish. Eat fish and throw food in the usual way. (refer to this method for intensive fish ponds)

Mainly to cultivate silver carp. The species of silver carp are about 0.3 jin ~ 0.5 jin each, about 1 jin each, about 50 fish each about 1.5 jin, about 30 silver carp with about 0.3 jin each, and a certain amount of crucian carp bottom fish. Starting from July, we should grasp the market situation and catch the big fish and keep the small ones. The total output is more than 500 kilograms per mu.

The choice of fish and fertilizer

The selection of modern bio-organic compound fertilizer not only contains a large amount of major elements such as nitrogen, phosphorus and carbon, but also contains balanced trace elements, a variety of amino acids, organic matter, peptides, beneficial bacteria, fertilizer enhancers, etc., which is not only nutritious and comprehensive, but also can fertilize, improve and control water, providing a good living environment for fish. It is especially suitable for cultivating macroalgae, rotifers, cladocera, copepods and other favorite plankton of silver carp, which provides a guarantee for the high-yield culture of silver carp.

Fertilizer input method: normal application of base fertilizer. In March, 300 kg of fermented manure per mu was applied, once amino acid fertilizer and water paste was applied, and amino acid bio-organic fertilizer was applied in April, with a water depth of about 4 kg per mu. Fertilizer is used every 5 to 7 days in the morning in sunny days, 300 kg per mu of manure in mid-June, with appropriate phosphorus and nitrogen fertilizer in July, August and September, and bodyguard fertilizer in November, and about 30 times a year. The effect of fertilization is based on keeping the transparency of the water body about 30 cm.

At present, the main types of fish fertilizers are compound fertilizer, compound fertilizer, organic mixed fertilizer and bio-organic fertilizer. Some organic mixed fertilizers are made by adding organic matter (such as chicken manure) to inorganic mixed fertilizers. The real bio-organic fertilizer is made by inoculating high-energy organic matter into specific bacteria, fermenting and decomposing under specific artificial conditions, and then adding some beneficial bacteria, fertilizer enhancers, specific enzyme preparations, trace elements and so on. Some manufacturers impersonate organic mixed fertilizer as high-efficiency bio-organic fertilizer, which can not achieve the goal of high yield for the cultivation of silver carp.

Water quality control problem

The main culture of silver carp needs fertilizer and water containing more than 30 milligrams of biomass per liter of water, using amino acid bio-organic fertilizer, which is rich in ingredients and diverse functions. Water is not enough fertilizer, silver carp food is insufficient, the growth rate will slow down, water fertilizer will appear microcystis, worsen the water environment, the growth rate of silver carp will slow down, and the quality will decline, there is a peculiar smell, it is necessary to apply fertilizer scientifically.

Disease prevention and cure

Disinfect the bottom of the pond and water body and release fish fry after disinfecting and killing insects. A microscopic examination of fish was carried out from March to April. If there are any insects, insecticides are used to kill parasites. The first disinfection was completed before April 30, and the dosage was about 200L, the second time, depending on the specific situation; the first disinfection and insecticide were completed before April 30th, and chlorine dioxide dibromohydantoin powder was selected, with a dosage of about 1500 kg. Prevention of hemorrhagic disease: according to the law of morbidity over the years, it should be used once or twice, the first time completed before July 1, the dosage of 200 liters of crude drug, the second time, around August 10, depending on the specific situation.