Blackfish pond ecological breeding technology

Blackfish, also known as black tadpole, has a fast growth rate, high aquaculture production, and strong disease resistance. It has now become a fine breed of pond culture.

First, pond conditions: The pond area is suitable for 1-10 acres, the water depth is 1.5-2 meters, the pond pond is 40-50 centimeters higher than the water surface, and the fence is surrounded with bamboo fences, nylon nets and other materials with a fence height of 50 centimeters or more. The water should be sufficient, the water quality should be fresh, the dissolved oxygen content in the pool water should be more than 5 mg/l, and the transparency should be more than 30 cm.

Second, seed stocking: (1) pre-preparation. 7-10 days before stocking, seedlings should be disinfected with 75-100 kg of lime dry dry ponds per acre, and water should be injected after 7 days. Around the pond, some plants are planted or water lilies are raised. The area of ​​aquatic plants cannot exceed 1/4 of the pond area. The pool is built with foodstuffs made of reeds, bamboo curtains, etc. Each size is 43 meters, fixed at about 2 meters from the shore and 50-60 centimeters from the water. More than 5 acres of ponds have 3-4 food platforms. (2) Selection of fish species. It is advisable to use locally produced fish species, which require the same specifications, smooth surface, full muscles, no injury, no disease, active swimming, and fierce competition. (3) Stocking specifications, time and density. There are two kinds of fish species for black-tailed ponds. One is a large-size fish species with 50 grams or more per tail. It should be put into the pond in the early winter and put 4000-5000 tails per acre; one is 60-200 tails per kg. The small-scale species of fish, which was bred from the early spring breeding seedlings in the past two months or so, should be put into the pond from June to July, with 6000-8,000 tails per acre.

Third, feed feeding: (1) black fish feed is divided into two kinds, one is a small wild fish-based fresh animal feed, and the second is artificial compound feed. Blackfish is a carnivorous fish. The content of crude protein in feed should not be less than 40%. The commonly used artificial feed formulations are: 48% of fishmeal, 51% of vegetable feed (bean meal, corn meal) and 1% of additives. (2) Feeding method: Feed each day in the morning and in the afternoon. The chilled fish should be immersed in liquid before being sterilized and cut into pieces. When the temperature is close to the temperature of the pool water, it will be put on the food table. The daily feeding amount is 3-10% of the total weight of the fish in the pond, and it can be grasped flexibly according to the specific circumstances. Generally, the fish is no longer eaten on the food table.

Fourth, daily management: (1) tour pond. Every morning and evening, each patrol pond will make and implement various feeding and management measures according to the weather, water quality and fish activity. (2) Water quality regulation. In the early stage of stocking, change the water every 10-15 days, each time change the water volume of the whole pool 1/3, July-September high temperature season, usually a small change for 3 days, change the water 1/3, 7-10 days a Big change, change water 2/3 to improve water quality. Sprinkle lime water and biologics once every 15-20 days, cross use. (3) Do a good job of cleaning. Clean the food table every day, remove the leftover bait residue and dead fish in the water, and cut away the water plants that have grown too high to prevent polluting the water. (4) Anti-escape. Raise the height of the pond, block the loopholes in the pond, prevent water leaking from the pond, and maintain fence facilities such as bamboo fences and nylon nets to prevent blackfish from escaping.

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