Blackfish greenhouse cultivation technology

In 2007, Li Dexin of Sandong Town, Sanzao Town, Mianning County established the Suining County Xingnong Aquatic Products Co., Ltd., and in the same year, the Xining Aquatic Products Aquaculture Cooperative was established in Suining County. The company contracted 500 mu of land for the blackfish in Gandong Village. Breeding exploration, at present, breeding technology has matured. The company adopts two greenhouse and earthen pond farming methods. Greenhouse farming is conducted for two years a year and covers an area of ​​more than 30,000 square meters. There are ten earthen ponds, each with 45 acres, and one year at a time. In 2009, 5000 aquaculture stocks were stocked per acre. After 3 to 4 months of cultivation, the yield per mu was 10,000 kilograms, and the production value per mu was 110,000 yuan. After deducting the cost of 57,500 yuan, the net income of 10,500 yuan was used for mu. Now we introduce the company's greenhouse cultivation experience as follows.

First, greenhouse cultivation

1, greenhouse conditions and seed stocking

(1) Greenhouse conditions: The water supply is sufficient, the water quality is fresh, the dissolved oxygen content in the pool water is more than 5 mg/l, the pH is 7-8, and the transparency is more than 30 cm. Each greenhouse is suitable for 1 to 2 mu, the water depth is about 1.5 meters, and the pond pond is 40 to 50 centimeters higher than the water surface. The rigid cement slope is built in the greenhouse.

(2) Pre-stocking preparation: Disinfection in clear ponds and water injection in clear ponds after 7 days. The pool is built with a food table made of wire, with a specification of 0.3 meters and 0.4 meters, fixed in the shore water. One to two food counters should be built per acre pond.

(3) Selection of fish species: The use of locally produced fish species requires uniform specifications, smooth surface, full muscle mass, no injuries, no disease, active swimming, and fierce competition.

(4) Stocking time and specifications: There are two kinds of fish species for raising blackfish in greenhouses. First, large-sized fish species with 50 g/head or more are stocked in the early winter. The other species is 60 to 200 tails/kilogram of small-scale fish species, which were bred from the early spring of the year and cultivated for about 2 months. They should be stocked in ponds from June to July. After the fry is placed in the pond, it is disinfected with a quicklime pool.

(5) Stocking densities: Large-scale fish species with a density of 50 g/head or more, 4000 to 5,000 tailstock per mu. 60-200 tail / kg small species of fish, stocking 6,000 to 8000 per acre.

2, feeding and management

(1) feed feeding

1 Feed types: The feed for blackfish is divided into two types. One is a fresh animal feed based on wild fish, and the other is a floating pellet feed. Blackfish is a carnivorous fish and the crude protein content in feed must not be less than 40%.

2 feeding method: feeding 2 times a day, 1 in the morning and afternoon. Particulate feed is generally fed at the time of the fingerlings, and the adult fish is fed with fresh chilled fish. Before the feeding, the liquid must be soaked and sterilized. The feed is cut into pieces. When the temperature is approximately the same as the water temperature of the pool water, it is fed to the food table. The daily feeding amount is 3% to 10% of the total weight of the fish. It should be handled flexibly according to the situation. The food is eaten at the food station.

(2) Daily management

1 Xuntang: Every morning and evening, formulate and implement various feeding and management measures according to weather, water quality, and fish activity.

2 Change of water: black fish single-cultivation due to stocking density, residual bait, excrement, pool water is easy to black, smelly, the most effective solution is to change the water frequently. Change the water once every 10 to 15 days, changing the water every time by 1/3. In the hot season of July-September, it is usually a small change in 3 days, changing the water by 1/3, changing the water by 7-10 days, and changing the water by 2/3 to improve the water quality.

3 Sprinkling water body disinfectant: regularly disinfect water body disinfectants such as dibromohydantoin and chlorine dioxide.

4 Do a good job of cleaning the pool: Wash the table every day, and remove the leftover bait and dead fish in the water to prevent pollution of the water.

5 Anti-escape: Blackfish have a strong ability to back up water and aisle habits, and should do a good job of daily escape management. It is necessary to plug the loopholes in the pond and prevent the water leakage from seeping in the ponds. Reinforce the height of the ponds and maintain fences such as bamboo fences and nylon nets to prevent blackfish from escaping.

Second, disease prevention

In the high-density culture environment, the common diseases of blackfish are: explosive haemorrhagic disease, gill disease, and hydromycosis.

(1) Burst Hemorrhage: Treatment is performed using a combination of internal and external use. Oral administration is based on 100 kg of bait and 50 kg of enrofloxacin is used to feed the bait, which is used for 5 days as a course of treatment. External use of chlorine dioxide, bromochlorohydantoin and other drugs to sterilize water bodies, food tables, and fishing gear.

(2) Gill disease: It is optional to use pesticides approved by the country.

(3) Saprovirus: In the course of net operation and transportation, fish injuries should be avoided as much as possible. Injuries to fish must be sterilized with 4% salt water.

Third, fishing sales

In general, fishing is done by pulling nets, and it can also be captured by the method of flowing water according to the characteristics of the blackfish. All the fish in the greenhouse are harvested, meet the market requirements of the listed market, and do not meet the listed specifications to remain as the next year's fish species. Recommendation: If the market price for concentrated listing in winter is low, the fish can be kept in the greenhouse for breeding. After the price rises in the spring, the market will be listed again, and the seasonal price difference will be achieved to increase the value of the product.

Silicone Vibrator

Spice Novelties Co.,Limited ,