If you are breeding herring, please pay attention to these things
1. Current status of herring farming
As one of the four major fish, herring has always been a favorite of many friends. The meat of herring is firm and delicious. However, herring is indeed not as much as the other several fish among the four major fish in artificial breeding. There are also certain reasons for this.
(1) The breeding cycle of herring is longer
The growth rate of herring among the four major fishes is relatively slow. Generally, herring grows to ten pounds before they can go out of the pond. The common grass carp on the market can be listed at about five pounds. Because the growth is relatively large, the growth period will be longer than that of other domestic fish breeding, and the breeding cycle is long. Naturally, it is not as short as the breeding cycle. The domestic fish with quick results have been loved by farmers.
(2) The herring market is narrow
Although herring tastes very good, many friends also say that herring is better than grass carp, but due to its greater weight, a herring generally weighs about ten pounds, which is naturally not suitable for household consumption groups. The picture is fresh, and it is naturally inconvenient to save it if you can't finish it. The season with the best sales of herring is mainly concentrated in the spring, and in some areas for pickling cured fish, so the farmers will naturally reduce the breeding of herring.
(3) The risk of herring farming is high
This is easier to understand. The herring culture cycle is longer, which also increases the herring culture cost. In the aquaculture process, some sudden diseases often occur, which undoubtedly increases the risk of breeding for farmers. In addition, there are many good-selling fish on the market, and there are many substitutes for herring. Farmers are naturally more willing to breed these quick-risk and low-risk fish. In addition, herring mainly feeds on snails, clams, mussels, etc., increasing the feed input of farmers.
Therefore, after comprehensive consideration, many farmers will choose to raise a small amount of herring in the process of breeding, but there are still fewer specialized herring.
(2) Do a good job in pond disinfection
Winters are cold and dry in many areas, and are not suitable for the growth of herring. Herring ponds are generally dried up. Farmers should use this period to clean, clean and disinfect the pond. First of all, the sludge and other debris in the pond should be properly cleaned. In this process, 0.1 m thick silt should be kept at the bottom of the pond, and then the pond dike should be repaired and strengthened to ensure the reasonable water quality and quantity in the pond during the breeding period.
After cleaning the breeding pond, expose it to the sun for about 20 days, and then use 120 kg per mu of quicklime to add water to prepare a solution, and spray all corners of the pond again. Finally, use related tools to turn the sludge in the pond to further integrate the lime solution with the sludge to eliminate harmful substances such as pathogens as much as possible.
(3) Improve water quality and cultivate biological bait
The organic fertilizer should be applied to the bottom of the pond about 9 days before the stocking of fingerlings. Generally, a mixture of quicklime and chicken manure is applied as an organic fertilizer to the pond, ensuring that the application rate per mu is about 280 kg. Two days later, the amino acid fertilizer water paste is applied to the pond to ensure that the dosage is 1 kg per mu. The main function is to cultivate benign plankton and other benign planktons, and to provide sufficient bait for the stocking fish species in the later period. During the actual breeding period, the amino acid fertilizer water paste should be administered every 11 days, preferably 0.8 kg per mu, in order to supplement the nutrition of plankton in the pond waters, increase its breeding speed, and expand its distribution area.
(4) Fish stocking
a. Strictly control the quality of stocking fish species. From the appearance, it can be seen that good breeding usually has a strong body, liveliness, uniform fish species specifications, no damage, no related diseases, and must meet the national regulations. Quality standards for fingerlings and fry.
b. Do a good job in fish disinfection. Before stocking fish into ponds, they should be disinfected with 4% salt solution for about ten minutes to eliminate pathogenic bacteria and other harmful substances on the surface of fish species.
c. Analyze and study the actual conditions of the breeding pond, herring living habits, breeding technology, etc., and then determine the number of fish stockings reasonably. If the number of stocked fish species is too large and the density of fish species is too large, it will inhibit their growth rate and easily cause related fish diseases. If the number of stocked fish species is too small, the role of the pond cannot be fully exerted, which will affect the economic benefits of the farmers to a certain extent.
(5) Reasonably herring feed
For the bait for feeding herring, farmers generally choose the special pellet feed for herring sold by regular merchants. This kind of feed has a high protein content and relatively full pellets, which is more suitable for pond farming. Generally, a feed station will be set up at a position about three or four meters away from the middle of the pond, which will help the herring group to grab food in the middle and give full play to the regular feeding of the bait machine. The number of feedings per day should be about four times, and the amount of bait should not exceed 5% of the total weight of herring.
There are usually three stages of bait feeding. The first stage is 4563 months. The feeding rate is 4 times a day, and the feeding rate is about 3%. The 7th, 1983 month is the second stage, feeding 3 times a day. The bait rate is about 5%; October and after is the third stage, feeding twice a day, the bait rate is 2%.
In addition, different fresh biological baits can be fed according to different seasons. The climatic conditions in early April are more suitable for the breeding of snails. Live snails can be put into the pond at a rate of 300 kg per mu. In August, it will be supplemented once according to the amount of 200 kg per mu. Snails are widely distributed and have low collection costs. They are one of the most popular biological feeds for herrings. Not only can they feed on the spoilage substances in the pond water to purify the water quality, they can also increase the growth speed of the herrings, bring higher economic benefits to farmers.
(6) Strictly control water quality
Water quality regulation is a key link in the process of breeding herring. Normally, new water is added every 9 days or so. The depth of the water is about 25 cm. Maintain the water depth of the pond at 150-200 cm and the transparency at 35 cm. Taking one month as the time unit, the pond water is disinfected once with quick lime to reduce the content of organic suspended matter in the water, and the pH value of the water body is controlled within 7.0-8.5. At the same time, micro-ecological preparations are regularly put into the water to adjust the water quality and keep it in good condition all the time.
In addition, it can play the role of an aerator, and use an aerator to add oxygen under hypoxic conditions in pond waters such as cloudy morning, sunny noon, and midnight on a rainy day. When an emergency such as a floating head occurs, the aerator should be used to add oxygen in advance. If the oxygenation equipment fails, you can sprinkle an oxygenating agent to increase the dissolved oxygen to ensure that the dissolved oxygen exceeds 3 ml/liter.
(7) Disease prevention
Herring is distributed in various parts of the world, which reflects its strong disease resistance. Farmers must strictly control the water quality of the pond, and do a good job of disinfection in time, adhere to the principle of prevention first, and treatment supplemented, and the incidence of herring can be greatly reduced.
Regular disinfection preparations such as chlorine-containing preparations can be used to spray the pond area in all directions, which can not only effectively adjust the water quality, but also prevent the occurrence of bacterial diseases in the herring. Feeding ponds made of Chinese medicine, multivitamins, etc. can effectively prevent diseases such as gill disease and enteritis in herring. If it is found that the herring has a disease, it is necessary to confirm the diagnosis immediately, administer the medicine according to the symptom, and treat the medicine to avoid high toxicity.
(8) Daily maintenance and management
Every morning and evening, the farmer should conduct a patrol inspection of herring ponds and form a custom, in order to timely and comprehensively understand and record the living conditions of herring growth, feeding, etc. Understand the situation to adjust the feed volume.
The data such as pH value, dissolved oxygen, water temperature and other data of herring pond water can reflect the quality of the water, so it must be tested regularly. Once the water quality is found to be deteriorated, reasonable measures should be taken in time to improve it.