The varieties of freshwater aquaculture are constantly increasing and improving, among which the four major fish species are widely distributed in inland areas. As an important cultured species among the four major fish species, grass carp has the characteristics of fast growth, short growth cycle, low breeding cost, wide source of feed, considerable benefits, and delicious food. It is favored by farmers and consumers. Judging from the current situation, we must fully understand the issues that need attention in grass carp farming, improve the success rate and economic benefits of grass carp farming, and gradually improve grass carp farming. Exploring the technical experience of green and efficient grass carp breeding can promote the healthy and green development of the breeding industry. So what are the breeding methods for grass carp?

1. Pond conditions

The pond is required to be far away from pollution sources, with an area of ??5 to 10 acres, a flat bottom, loam as the bottom material, and micro leakage is the best. The bottom mud is 10~20 cm and the water depth is about 2 meters. Each pond should be equipped with a 3 kW impeller aerator and a 4-inch water pump to facilitate timely water change and oxygenation.

2. Cleaning and Disinfection

Grass carp has many diseases, and epidemic diseases are more likely to occur in ponds. At the same time, removing miscellaneous fish is an important measure to ensure the normal food intake and material saving of grass carp. The specific method is to spread 10 kilograms of quicklime slurry over the entire pond under conditions of a dry pond (water accumulation of 5 to 10 centimeters), or dissolve 10 kilograms of bleaching powder in warm water and then sprinkle it over the entire pond to completely kill pathogenic bacteria.

3. Water quality requirements

The pond water quality should be pH 7.5~8.5, the transparency of the pond water should be maintained at about 30cm during the peak breeding period (June to September), and the oxygen consumption of organic matter should be 18 ~ 20 mg/L.

IV. Precautions

1. Reduce the amount of aquatic plants: According to experimental observations, grass carp can grow 1 kilogram of meat by eating 15 kilograms of terrestrial aquatic plants, and can grow 1 kilogram of meat by eating 60-80 kilograms of aquatic plants. It grows 1 kilogram of meat, so if there are sufficient sources of terrestrial aquatic plants, you can feed less or no aquatic plants.

2. Feed more fresh and tender feed: Fresh and tender feed is rich in nutrients, has less fiber and is easy to digest. Feeding grass carp fresh and tender forage can make grass carp grow faster, have fewer illnesses, reduce feeding volume, reduce breeding costs, and improve economic benefits.

3. The feeding method must be appropriate: Feed grass carp regularly, in sufficient amounts, and evenly every day to spread the forage so that the fish can eat well. Adjust the feeding amount according to specific conditions such as weather, water quality, fish activity, etc. It is prohibited to feed grass carp that has been stored for too long or has become moldy or spoiled to prevent grass carp from contracting diseases.

4. Feed according to fish diameter: The diameter of juvenile grass carp is small, and coarse and hard forage is not allowed to be fed. It is advisable to feed duckweed, sedge and other forages, or fresh and tender long-leaf grass after being crushed. Later, as the fish age increases, the diameter gradually increases, so that the fish can be fed regular fresh feed.