High density culture of wheat spike fish

Seed and seedling selection: fish fry with mature gonads, strong physique, intact scales, free from injuries and parasites should be selected. Fish fry stocking: about 8-100000 fry per mu. Fish fry management: feed the food once a day in the morning and evening, either with self-made feed or mixed with live bait. Water quality management: to ensure the circulation of water in the pond, more than 30% of the water needs to be changed every 5 days. Disease control: need to prevent cyclops, tadpoles and some bacterial diseases.

I. Seedling selection

1. 2-year-old and above fry with a body length of more than 5 mm and a weight of more than 3 grams should be selected when selecting seedlings.

2. Fish fry should be checked for gonadal maturity, physique, scales, injuries, parasites and so on.

3. Disinfect the fish with 35% salt water before stocking, about 5-10 minutes.

4. The density of fish fry is about 1000-1500 per mu.

2. Stocking of fish fry

The main results are as follows: 1. The area of the cultivation pond is about 700-1300 square meters, the depth of water is about 1.5m, and the bottom needs silt below 10cm.

2. About 75-100 kg of disinfectant per mu is needed to disinfect the cultivation pond. After 7-10 days of disinfection, it is necessary to inject water into the cultivation pond and plant aquatic plants at the bottom.

3. About 8-100000 fish fry are released per mu.

4. The cultivation pond needs to be changed regularly, and the amount of water is about 30% each time.

5, but also regularly check the gonadal development of fish fry.

III. Fish fry management

1. In order to promote gonadal development, it should be flushed every 5 days after late March, with a flushing time of 34 hours each time.

2. the food is mainly fed with oil bran or self-made compound feed, twice a day, once in the morning and once in the evening, the feed can be self-made feed or mixed with live bait.

3. When feeding, it is appropriate that the fish can be eaten within 2 hours, and the feed amount should be adjusted according to the feeding condition of the fish.

IV. Water quality management

1. In the early stage of fry, the water level is required to be low, about 50-80 cm.

2. As the fish grows up and the temperature of the water rises, it is necessary to slowly raise the water level. It is necessary to inject water about once a week, and the amount of water injected each time is about 20 cm.

3. The water in the pond should also be recycled continuously, changing about 30% of the water every 5 days as far as possible, and applying microbial preparations every half a month or so, so as to improve the water quality.

V. Disease prevention and control

1. It is necessary to adhere to the principle of "treatment with disease, prevention without disease, combination of prevention and treatment, and prevention first".

2. In the early days, Cyclops and tadpoles need to be controlled. After discovery, trichlorfon can be killed with 0.3 milligrams of trichlorfon per liter, and the tadpoles in the water should be fished out in time.

3. For some bacterial diseases, strong chlorine, chlorine dioxide, avermectin or deltamethrin can be used regularly for germicidal control.