What are the breeding methods of grass carp?

Freshwater aquaculture varieties are increasing and improving, among which four kinds of fish are widely distributed in inland areas. Grass carp, as an important species among the four major fishes, has the characteristics of fast growth, short growth cycle, low breeding cost, wide feed sources, considerable benefits and delicious taste, and is favored by farmers and consumers. Judging from the current situation, we should fully realize the problems that need attention in grass carp culture, improve the success rate and economic benefits of grass carp culture, and gradually improve the level of grass carp culture. Exploring the technical experience of green and efficient culture of grass carp can promote the healthy and green development of aquaculture. So what are the breeding methods of grass carp?

I. Pond conditions

The pond is required to be far away from pollution sources, with an area of 5~ 10 mu, flat bottom and loam as the bottom material, and micro-leakage is the best. Sediment 10 ~ 20cm, and the water depth is about 2 m. Each pond should be equipped with a 3 kW impeller aerator and a 4-inch water pump, so as to change water and aerate in time.

Second, cleaning and disinfection

Grass carp has many diseases, and ponds are more prone to epidemics. At the same time, removing miscellaneous fish is an important measure to ensure the normal feeding and material saving of grass carp. The specific method is to sprinkle quicklime slurry 10 kg or dissolve bleaching powder 10 kg in warm water in the whole pond under the condition of dry pond (accumulated water is 5 ~ 10 cm) to completely kill pathogenic bacteria.

Third, the water quality requirements

The water quality of the pond should be pH 7.5~8.5, the transparency of the pond water should be kept at about 30cm during the peak period of culture (June ~ September), and the oxygen consumption of organic matter should be18 ~ 20mg/L.

Fourth, matters needing attention

1. Reduce the amount of aquatic plants: According to the experimental observation, grass carp can grow 1 kg of meat by eating 1 kg of terrestrial aquatic plants, and 60-80 kg of aquatic plants can grow1kg of meat, so if the source of terrestrial aquatic plants is sufficient, it can be fed less or not.

2. Feed more fresh and tender feed: Fresh and tender feed is rich in nutrition, less in cellulose and easy to digest. Feeding grass carp with fresh and tender forage grass can make grass carp grow faster, have fewer diseases, reduce feeding amount, reduce breeding cost and improve economic benefits.

3. The feeding method should be proper: feed grass carp regularly, adequately and evenly every day, so as to spread the forage and let the fish eat well. Adjust the feeding amount according to the weather, water quality, fish activities and other specific conditions. It is forbidden to feed forage that has been stored for too long and is moldy and deteriorated to prevent grass carp from getting sick.

4. Feeding according to the diameter of the fish: the diameter of grass carp larvae is small, so it is impossible to feed coarse and hard forage. It is appropriate to feed duckweed, sedge and other forage, or feed fresh and tender long-leaved grass after barium crushing. After that, with the growth of fish age, the caliber gradually increases, and it can be fed with conventional fresh feed.