High density culture technique of wheat spike fish

It is necessary to select high-quality and disease-free varieties of wheat ear fish for culture, and then go to the pond to spray quicklime for disinfection, and the number of fish fry is about 8-100000, and in the process of culture, oil bran or self-made formula feed can be fed, usually twice a day, when the water quality becomes fat, the water should be changed in time, and microbial preparations should be sprinkled every half a month. And regular use of strong chlorine, chlorine dioxide, avermectin and other agents to control diseases.

I. selection of varieties

Can be in accordance with foreign classification standards, select barley fish culture, special class has unique characteristics, such as text spots, star features, gorgeous features, strange colors and so on.

The flower spots of grade A (first grade) will be arranged and extended to the middle near the head, the lower body surface behind the Gill is red, the distribution of flash stars is more, and the markings are clear.

Grade B (secondary) is bounded by the middle of the body, and the arrangement of tail spots will not exceed the middle, but the color of the body surface is bright, and there are a small number of shining stars on the scales.

The body color of grade C (grade 3) is darker, with 1-2 spots, and the figure is longer.

2. Stocking of fish fry

1. 7-10 days before fry stocking, quicklime should be sprayed on the pond for thorough disinfection, and then biological fertilizer should be applied to cultivate rotifers. In the process of culturing wheat spike fish, the transparency of water quality in the pond should be kept at 20-25cm, and about 8-100000 fry per mu should be released in the pond.

2. oil bran can be fed again after stocking, during which it can be fed according to the season and temperature, as well as the growth of fish fry, usually 1-3 times a day, and after about 3-5 months, it can grow to commodity specifications, with an average of 120-160 pieces per kilogram.

Third, put into feed

Wheat spike is an omnivorous fish and likes to eat zooplankton. It can be fed with oil bran or self-made compound feed. The feed formula is 12% corn meal, 21% rapeseed meal, 29% wheat meal and 38% fish meal. Normally, it can be fed twice a day, and the feeding amount is about 5% of the body weight of barley fish in the pond.

IV. Water quality management

The main results are as follows: 1. In the early stage of fry growth, the water level should be kept relatively low, usually 50-80cm. With the gradual growth of wheat spike fish and the continuous rise of water temperature, the water level will rise, usually once every 7 days, and each time the water injection is about 20cm.

2. When the water quality in the pond becomes fertilised, the water quality can be regulated by proper water injection and fertilization, and the water can be recycled continuously if necessary. The water is usually changed every 5 days or so, and the amount of water each time is 1 × 5 of that of the water body in the pond. Moreover, microbiological preparations should be applied every 10-15 days, which is beneficial to the healthy growth of barley fish.

5. Prevention and control of diseases

In order to avoid the occurrence of bacterial diseases, in the process of breeding, bactericidal and insecticidal drugs such as strong chloroform, chlorine dioxide, avermectin, or deltamethrin should be sprinkled in the whole pool regularly, and diseases should be prevented and treated in strict accordance with the guidelines for the use of fishery drugs. illegal drugs should not be used for prevention and control.