The density of herring and the number of individuals are unparalleled. It can be said that herring is the most prolific fish in the world. Because of its large output, breeding herring has become a way for many people to get rich. Now I will introduce the method of herring culture for you. Welcome to read. Requirements for herring culture environment

The culture environment includes atmospheric environment, fish growing water environment and water quality of fishery source, etc. The culture environment must meet the national standards "Environmental Requirements for Safe Quality of Agricultural Products and Pollution-free Aquatic Products" (GB/T18474 -21), "Fishery Water Quality Standard" (GB/T1167-89) and "Water Quality for Pollution-free Food Freshwater Culture" (NY551-21). Selection of herring culture waters

The herring culture waters should be selected in waters with good ecological environment, sufficient water resources and no or no direct pollution from industrial wastes, agricultural, urban life and medical wastes. There are no pollution sources that pose a threat to the aquaculture water environment in the aquaculture waters, upwind and upstream of irrigation water sources. Surplus sludge in ponds should be removed in herring culture

Sludge consists of biological carcasses, residual bait, feces, various organic debris and various organic and soil deposits. Through the decomposition and ion exchange of bacteria, they are continuously dissolved and released into water, providing nutrients for the reproduction of bait organisms. However, too much sludge will produce a lot of hydrogen sulfide, methane, organic acids, lower amines and mercaptans, which accumulate in water and affect the health and growth of herring. Therefore, excess silt should be removed. The specific measures are to drain the pond water and dig out excessive silt every one or two years, so that it is more appropriate to keep the silt at the bottom of the pond about 2 cm. At the same time, the bottom of the pool is exposed to the sun and frozen, killing pests, parasites and pathogenic bacteria. Disinfection of herring pond water

To improve the pond environment, eliminate harmful organisms and prevent some bacterial diseases, it is necessary to disinfect the pond and water. The commonly used disinfectants and their dosage are as follows: ① Clean the pond with 2-25 mg of quicklime per liter, or spray the whole pond with 2-25 mg of quicklime water per liter for disinfection; ② Clean the pond with 2 mg of bleaching powder per liter, or spray the whole pond with 1. mg ~1.5 mg of bleaching powder per liter for disinfection; (3) using sodium dichloroisocyanurate solution with the content of .3 mg ~.6 mg per liter to spray and disinfect the whole pool; Or use .2 mg ~.5 mg trichloroisocyanuric acid solution per liter to spray disinfection in the whole pool. Water quality management of herring culture

Water environment is the basis for herring to live and grow in ponds, and all kinds of fish culture measures also act on fish through the environment. Therefore, water quality management is a bridge for pollution-free culture of herring. To ensure that the pool water is rich in plankton, organic matter and nutrients; The transparency of the pool water should be kept between 25 cm and 4 cm. The dissolved oxygen in the water is more than 4 mg, the pH value is 7~8.5, and the water quality meets the requirements of being fat, lively, tender and refreshing.

cultivation and selection of herring fry

cultivation of herring fry

the production and introduction of herring fry should conform to China's Fisheries Law and Quality Standard for Herring fry (GB9956? 88) and the "Measures for the Management of Aquatic fry" promulgated by the Ministry of Agriculture, the parents used for breeding must come from the original seed farm, and the quality conforms to the "Parent Fish of Black Carp, Grass Carp, Silver Carp and Bighead Carp" (GB/T555? 1997) standard. The production conditions and facilities shall conform to the requirements of production technical operation regulations, and the quality of the seed shall be inspected and quarantined by qualified professional and technical personnel.

1. Selection of fry

The quality of herring fry can be distinguished according to the size, body color, fry activity and physical strength when coming out of the pond: high-quality herring fry should conform to the Quality Standard for Herring fry, and come out of the pond with neat specifications, bright body color, lively action, quick diving into the bottom after being frightened and strong ability to grab food. During the sampling inspection, the seedlings jumped wildly in the white porcelain basin, their bodies were fat, their fins were complete and there was no abnormality. On the contrary, it is inferior seedlings.

2. Cultivation of fry

According to the different requirements of feed for herring fry at different development stages, it can be divided into two stages for cultivation. ① fry stage. Spraying the film for 3-5 days, the stocking density is 1 million-1.5 million fish per hectare, and the pond area is 1,334-2,668 square meters. From the first day to the tenth day after entering the pond, soybean milk was fed, including 3 kg per hectare for the first five days and 4 kg per hectare for the next five days. After 1 days, it was increased as appropriate, twice a day, and the whole pond was sprinkled evenly. Add 15 cm ~2 cm of water every 5 ~7 days, and add it to the water depth of 1.3 m ~1.5 m when the summer flower leaves the pool. According to the water quality of the cultivation pond, appropriate topdressing should be applied. After about 25 days of cultivation, fry should be sparsely divided into pools, and two or three intensive exercises should be carried out before leaving the pool. ② fingerling stage. The feeding habits gradually differentiated and began to eat snails. The stocking time is before the summer solstice, with an area of 2,-4, square meters and a water depth of 1.5-2 meters. There are 8,-1, herring, 18,-2, bighead carp and 5, crucian carp per hectare. Firstly, a small amount of concentrate was used to lure herring to the dining table, and then bean cake pulp was fed twice a day, with 23 kilograms of bean cake pulp per 1, fish each time; After the specification reaches 5 cm, mix the vegetable cakes, and after 7 cm, change to soaked vegetable cakes or bean cakes; After the size reaches 1 cm, the crushed snails are mixed and fed with 3 kg per 1, tails, and then gradually increased.

feeding should be carried out in four ways.