How to raise grass carp, grass carp culture techniques

Grass carp is one of the fish we often eat, its meat is very tender and delicious, and the nutritional value is very high, often eating has certain benefits to the body. With the increasing demand for grass carp, grass carp culture has become a more popular culture project. So do you know exactly how grass carp are raised?

How to raise 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.

Culture techniques of grass carp

1. Fish fry are released after Ching Ming Festival in April, and tender grass can be seen everywhere in April. At this time, the delicate weeds in the fields can be cut at 9 o'clock in the morning to feed the fish fry. It is appropriate to feed the fish fry in 3 hours and 4 pm in the afternoon for two hours.

2. At the beginning of spring, forage grasses such as grass can also be planted to increase green fodder. the protein of grass with strong drought tolerance is 16%.

3. In mid-May, cassava planted by farmers can be cut and fed to grass carp, that is, 1 to 4 stems will grow after cassava is planted, leaving only one to cut off the excess, which is good for growth. The protein content of cassava leaves is about 20%. It is appropriate to feed cassava leaves for 3 hours and feed for 2 hours at 4 pm.

4. Make a square feeding frame with bamboo to facilitate feeding. The cassava stalks should be picked up in time after feeding, so as not to rot in the water and affect the water quality.

5. Cassava leaves and elephant grass should be alternated every other day to increase the feeding of different nutrients.

6. After 8 to 9 months of careful feeding of green feed and feed, the weight of grass carp can reach 4 to 5 jin. In this way, the meat quality of farmed grass carp is more than double that of grass carp fed only with feed.

7. Feed regularly and rationally, and do not feed fish or less on cloudy and rainy days. Feed should choose a manufacturer with a good reputation.

Pond construction of grass carp

Grass carp culture base should have sufficient water source, good water quality, meet the "pollution-free food fresh water culture water quality standard", smooth drainage, fish ponds do not communicate with each other, convenient transportation of fish, rich feed resources, good ecological environment conditions. The area of the pond is 10 to 20 mu, the water depth is 2 to 2.5 meters, the thickness of silt is not more than 20 centimeters, and there is an aerator and an automatic bait machine with a power of 3 kilowatts for every 10 mu pond. Drain the pond water in winter, freeze for more than 20 days, 15 days before fish stocking, 10-20 cm of water, clear the pond with 150 kg of quicklime per mu.

Ecological habits of grass carp

Grass carp generally like to inhabit the middle, lower and nearshore aquatic grass areas in rivers and lakes, and have the habit of river and lake migration. sexually mature individuals lay eggs in rivers and reservoirs, and after spawning, parent fish and young fish enter tributaries and lakes, and usually feed and fatten in flooded shoal grasslands and flooded areas as well as water bodies attached to trunk and tributaries (lakes, streams, harbours and other grassy areas). Winter spends the winter in the deep waters of the main stream or lake. Grass carp (Ctenopharyngodon idellus) is a typical herbivorous fish, feeding on zooplankton in fry stage, insects, earthworms, algae and duckweed when its body length is more than 10 cm, especially Gramineae plants, when the body length is more than 10 cm, grass carp is a typical herbivorous fish.

Through the above content, I believe everyone has a certain understanding of the culture technology of grass carp. As we all know, there are risks in starting a business, and no project can make a steady profit. in order to reduce the probability of loss, we must understand the breeding technology and market analysis, and be prepared.