First, high-yield breeding methods and techniques of herring
1, pond preparation
The pond requires sufficient water source, pollution-free water quality, water depth between 1.5 m and 2.5 m, with an area of 5 mu ~10 mu. The ridge of the pond is firm, watertight, sunny, flat bottom and less silt. Remove excessive silt from the pond before stocking the fish, freeze and expose for several days, add 30 cm of water, then dissolve each mu with quicklime 150 kg, then sprinkle it all over the pond, filter and inject water every 2 ~ 3 days, then soak it in 50 kg per mu for one day and night, and then sprinkle it. At the same time, it is required to have a power supply. Every 3 mu to 5 mu of water surface is equipped with 3 kW impeller aerator 1 set and bait feeder 1 set.
2. Fish stocking
After the toxicity of disinfection drugs disappears, filter and inject water to prevent wild fish from mixing into the pool. Fish should be stocked around the end of February, so the water temperature is low, the scales of fish are tight, and fish are not easy to be injured by pulling nets and handling. 200 ~ 250 second-year-old juvenile fingerlings with tail weight 1 kg are stocked per mu, with silver carp fingerlings with tail weight of 0.3 kg 100, 50 bighead carp fingerlings and 20 snakehead fingerlings with tail weight of 0.05 kg. Soak the fish in the mixture of copper sulfate (dosage 8 g/m2) and bleaching powder (dosage 1 g/m2) for 20 ~ 30 minutes before entering the pond, or disinfect with 3% ~ 5% salt water 15 minutes.
3. Feed feeding
The artificial compound feed with crude protein content above 30% was selected, and the feed grain diameter was 4 mm, and the length was 1.5-2 times of the grain diameter. Wooden and bamboo boards can be used to build a feeding platform extending 3 ~ 4 meters to the center of the pond, and the herring colony can float up to grab food by domestication, which gradually comes down to feeding the feeding platform at a fixed point with a feeding machine. The daily feeding rate can be according to March1.5%, April 2.0%, May 3.0%, June 4.5%, July 5.5%, August 6.5%, September 5.0%,1October 3.0%,1/kloc-. Feed it three to four times a day.
4. Daily management
① Patrol the pond every morning and evening to check the water quality and observe the fish situation. From June to September, start the aerator at noon on sunny days 1 hour ~ 2 hours, and start it in the middle of the night on rainy days. When the floating head is heavy, it must be turned on until dawn.
(2) Water quality management: add fresh water regularly, so that the water quality can meet the requirements of being fat, fresh, tender and refreshing. In June, the whole pool is sprinkled with quicklime 1 time every 15-20 days (the dosage is per mu 15-20 kg).
(3) Chlorine-containing preparations were sprayed and disinfected in the whole pond for fish disease prevention and control, and drugs were added to the bait to make drug bait for feeding.
Second, what is the prospect of herring culture?
As a traditional breed, herring has always been favored by consumers. In recent years, the market price of herring has been rising, and the prospect of breeding herring is better. The high-yield technology of main cultured herring in ponds is introduced as follows. With this technology, the yield of herring 1000 kg per mu can be achieved.
Pond conditions The pond area is 8 ~10 mu, with excellent water quality, no pollution, convenient water injection and drainage, and the silt at the bottom of the pond is less than 20 cm. Each tangkou is equipped with 3 kW impeller aerator1~ 2 sets. Before stocking, the dry pond is exposed to the sun and disinfected with quicklime (60 ~ 75 kg of quicklime is used for disinfection in dry pond and 0/25 ~/0/50 kg of quicklime is used for disinfection with water). When stocking fish, the water level should be controlled at1~1.2m..
Fish stocks are put in harmless, disease-free, strong and tidy fish stocks. Stocking 900 ~1100 herring fish of 200 ~ 250g per mu, matching with 200 silver carp fish of 200g, 50 bighead carp fish of 250g and 50 Pengze crucian carp fish of 50g. Soak and disinfect the fish with salt water for 3 minutes before stocking.
Feeding and management feed is mainly artificial compound feed, which requires palatability and freshness. Generally, the feeding rate of fish is 0.5% ~1.5% in the initial stage of stocking, 3% ~ 6% in June ~ August and 2% ~ 3% after August. Black herring likes to eat live snails. In July and August, when the black herring eats a lot, a certain amount of live snails are purchased and fed with mixed pellet feed to reduce the incidence of enteritis. Adhere to patrol the pond in the morning, at noon and at night, and patrol more carefully to observe the feeding and growth of fish. Inject about 20 cm of fresh water every half month, master the on-off time of the aerator, and sprinkle quicklime water once every 20 days to prevent fish diseases and adjust water quality.
Prevention and control of fish diseases are mainly based on prevention, with equal emphasis on prevention and control. After the fingerlings are stocked, the insecticide is sprayed all over the pond, and then every half month or so, every cubic meter of water is sprayed with bleaching powder10 ~ 20g of water to prevent herring enteritis from July to August.
After timely fishing 10, the size of herring, silver carp, bighead carp and Pengze crucian carp can reach 1 kg, 1 .5 kg and 0.4 kg respectively, so they can be fished and listed as appropriate.
3. Which is more expensive than herring or grass carp?
Compared with grass carp, herring is relatively rare, so the price is more expensive than grass carp. In order to let everyone know the price of herring and grass carp more intuitively, we take some cities in Guangdong as examples to see which is more expensive.
Provincial and municipal prices of herring and grass carp
5.9 yuan, Qingyuan City, Guangdong Province/kg 6.45 yuan/kg
9 yuan, Huizhou City, Guangdong Province/Jin 3.7 yuan/Jin
Guangzhou, Guangdong 10.5 yuan/kg 5.45 yuan/kg.
Chaozhou City, Guangdong Province 10.5 yuan/Jin 4.8 yuan/Jin
8 yuan, Jieyang City, Guangdong Province/Jin 6 yuan/Jin
Of course, we just compare the prices of two kinds of fish on a certain day, which can only be used as a reference. It doesn't mean that their prices are fixed. When we want to buy these two kinds of fish, the prices should still be based on the local market prices of aquatic products.