What is the best density of grass carp culture? what is the best depth of water for grass carp?

Grass carp is one of the common fish on our dinner table. Grass carp not only tastes fresh and delicious, but also has high nutritional value, which is rich in DHA, calcium, iron and other elements. Grass carp can be farmed and grow fast, so do you know what the density and water depth requirements of farmed grass carp are?

What is the best density of grass carp culture?

If the cultivation specification of grass carp is 2-3 jin / tail, it is generally 800-1500 grass carp fingerling per mu at the beginning of the year, and 300-1500 species / mu of grass carp.

Grass carp culture 5 jin / tail listed grass carp, generally 2-3 jin / tail grass carp 300 / mu, 1.8-2 jin / bighead carp 40 / mu, 0.2jin / crucian carp 500 / mu, 0.1jin / dace 1000 / mu.

How deep is the water for raising grass carp?

The area of grass carp pond should be 10-20 mu, the water depth is 2-2.5 meters, and the thickness of silt is not more than 20 cm. Each 10 mu pond is equipped with an aerator with a power of 3 kilowatts and an automatic baiting machine.

Pond conditions of grass carp

1. Pond conditions: the pond is required to be far away from the pollution source, with an area of 5 to 10 mu, a flat bottom, a loam soil with a little leakage, a sediment of 10 to 20 cm and a water depth of about 2 meters. Each pond should be equipped with a 3-kilowatt turbine aerator and a 4-inch water pump to prepare for timely water exchange and oxygenation.

2. Decontamination and disinfection: grass carp have more diseases, and the pond is more prone to epidemic. At the same time, the elimination of miscellaneous fish is an important measure to ensure the normal feeding of grass carp and save feed. The specific method is to sprinkle the whole pool with 100 kg quicklime pulp per mu in the case of dry pond (5-10 cm of stagnant water), or sprinkle it in the whole pool after dissolving with 10 kg of bleach in warm water, so as to completely kill the disease-causing bacteria.

3. Water quality requirements: the pH value of pond water is 7.5-8.5, the transparency of pond water is about 30 cm during the peak culture period (June-September), and the oxygen consumption of organic matter is 18-20 mg / L.

Feeding and management of grass carp

1, feed feeding: mainly feed pellet feed, feed protein content of 28% 32%, auxiliary green feed. Feed feeding follows the principle of "pre-coarse and post-refined" and "four fixed and four look". It is generally fed twice a day, and it is appropriate to finish eating within 2 hours and feed 80% of grass carp. After feeding pellet feed continuously for a period of time, the pellet feed should be stopped for one week, and the raw grain feed should be fed at intervals. Usually pay attention to adding appropriate amount of vitamins and other drugs in the feed to avoid a large number of deaths caused by diseases such as hepatobiliary syndrome of grass carp.

2. Water quality management: correct use of aerator, sunny and windless weather from June to October, turn on aeration for 2 hours at 1: 3 pm every day, and increase oxygen in the early morning. Oxygen should be increased early on continuous cloudy days. Add new water to the pond at the right time, and adopt the method of "small row and small advance, changing water many times" to gradually control the water quality. From June to September, add fresh water once every 3-5 days, about 10 cm each time, and sprinkle it with 10-20 kg quicklime in the whole pool every 15-20 days.

3. Disease prevention and control: the method of "combination of pre-coarse and fine, fine green" was adopted to control the occurrence of grass carp hepatobiliary syndrome. Grass carp common diseases are red skin disease, Gill rot disease, enteritis disease, generally take internal and external splash treatment, external splashing is mainly bleach, chlorine dioxide and other disinfectants, continuous use for 3 days. Oral administration with "Sanhuang powder" bait is better, every 50 kg of fish reuse Sanhuang powder (rhubarb 50%, Phellodendron Phellodendri 30%, Scutellaria baicalensis Georgi 20% crushed powder and stir well) 0.3 kg mixed with flour paste and mixed into the feed for 3 days.

4. Timely fishing: timely catching and listing of large adult fish is an important measure for high-yield grass carp culture, the main purpose is to reduce the fish carrying capacity of the pond water and promote the rapid growth of pond fish in the later stage. It is usually caught once at the end of July and when the water temperature is low in the early morning.

Through the above content, I believe that everyone has a certain understanding of the requirements of grass carp culture. Although grass carp culture has certain prospects and economic benefits, we must pay attention to the skills and matters needing attention in grass carp culture.