CATDOLL : CATDOLL: How to Keep Carp

As we all know, carp is one of the important farmed fish species in my country. It adapts quickly to the environment and has strong vitality. So, how to raise carp? Here are the methods of raising carp that I have carefully sorted out for you. Let's take a look.

How to raise carp 1. Pond conditions

It requires sufficient water and electricity sources, convenient transportation and no pollution. The pond breeding area is 6 mu, the water depth is maintained at 1.8 meters, the silt at the bottom of the pond is 15 to 20 centimeters, and the seedling cultivation pond is 4.5 mu.

2. Stocking of seedlings

(1) One-crop adult fish breeding: In early April, the commercial carp stored in the pond last year are harvested, the pond water is drained, wild fish and predators are removed, and then the pond is filled with water. Seven days before stocking, 30% chlorine bleaching powder (30 g/m3) is sprayed throughout the pond for disinfection. One-crop adult fish breeding is carried out in mid-April, and the adult fish are raised until early August when they reach commercial specifications for sale.

(2) Cultivation of large-sized carp seedlings for the second crop: In early August, all the existing commercial carp in the previous crop ponds are sold, and the pond water is drained and filled with new water to a depth of 1 meter. Five days before stocking the seedlings, the pond is disinfected by spraying 30% chlorine bleaching powder throughout the pond. 1,800 carp seedlings are stocked per mu, with a size of 50 grams per seedling. In early October, 200 silver carp fingerlings are stocked per mu, with a size of 750 grams per seedling, and 30 bighead carp fingerlings are stocked per mu, with a size of 1,250 grams per seedling. Cultivate until early April of the following year, and then start catching.

(3) Fish seedling cultivation in seedling cultivation ponds: Seedling cultivation ponds are used as a supplement to adult fish breeding ponds. In early to mid-April, the seedlings stored in the previous year are harvested, the pond water is drained, and the pond is exposed to the sun for more than a month. In mid-May, the water is filled to 30 cm, and 150 kg/mu of quicklime is sprayed throughout the pond for disinfection. 10 days before stocking, 200 kg/mu of fermented chicken manure is applied to fertilize the water and cultivate biological bait. In early June, 7,000 carp per mu, 300 silver carp per mu, and 200 bighead carp per mu are stocked. In August, when the carp grow to a size of 50 grams per tail, some carp are harvested as seedlings for the second crop of adult fish breeding ponds. The second crop of carp seedlings is cultivated during the high temperature season and cannot be caught with a dragnet. In order to reduce seedling damage and bacterial infection, the seedlings are placed in the pond for cultivation using a scoop net. The remaining carp fry are cultivated until the beginning or middle of April of the following year, and then used as large-sized fish for the first batch of breeding in the fish pond. The silver carp and bighead carp fingerlings in the fish pond also come from the fry breeding pond.

3. Daily management

(1) Feeding: Carp pellet feed is used, with the following nutritional ingredients: crude protein ≥30%, crude fat ≥11%, crude fiber ≤8%, crude ash ≤14%, calcium 0.8%-1.5%, moisture ≤14%; carp seedling pellet feed has a crude protein ≥33%. The feed particle size is adjusted in time with the growth of carp, based on palatability. On the second day after the seedlings are put into the pond, they are tamed by artificial fixed-point, timed, and sound conditioned reflex methods, and normal feeding is carried out when the seedlings gather to scramble for food. The fixed-point, timed, and quantitative feeding method is adopted by a feeding machine. In the process of carp breeding, the daily feeding amount is 3%-4% and fed 3 times a day in the early stage, and the daily feeding amount is 2%-3% and fed 4 times a day in the later stage. In the process of carp seedling cultivation, the daily feeding amount is 7%-8% and fed 5 times a day in the early stage, 4% and fed 4 times a day in the middle stage, and 3% and fed 3 times a day in the later stage. It can be flexibly controlled and adjusted at any time according to water temperature, weather changes, and seedling growth.

(2) Water quality control: Keep the pool water fresh, with a transparency of 20 to 30 cm, a pH value of 7.5 to 8.5, and a dissolved oxygen content of more than 4 mg/L. Change the water once every half month, with a water change volume of 30%. Disinfect once every 10 to 15 days using bleaching powder, dibromohydantoin, quicklime, etc. according to water quality indicators such as pH value. After the drug effect disappears, spray photosynthetic bacteria, Bacillus, etc. to purify the water quality and maintain the ecological balance of the pool water. Start the oxygenator in time. In sunny weather, the start-up time is: 12:00-14:00, 20:00-6:00 the next day. In rainy weather, the machine is turned on all day. When there is a lack of oxygen, start the oxygenator immediately.

(3) Disease control: Use disinfectants and biological agents to control diseases every half month. If carp are not eating well or are swimming scattering, feed them less at first and spray the entire pond with 0.3 g/m3 of dibromocyanate. After the drug effect disappears, mix the feed with photosynthetic bacteria and immune polysaccharides to make biological bait and feed it once a day for 3 consecutive days.

Introduction to carp: The scales have cross patterns, hence the name. The scales do not turn white after death. There is a line of flank scales from head to tail, and there are 36 scales regardless of the size of the fish, with small black spots on each scale. It tastes great and is produced everywhere. It is one of the delicacies on the Chinese table. In addition: Koi with brightly colored patterns has a high ornamental value in Asia. Carp is commonly known as carp crooks, hairy carps, etc., and belongs to the Cyprinidae family. The body is flattened and the abdomen is round, the mouth is horseshoe-shaped, and there are two pairs of whiskers. The base of the dorsal fin is long, and both the dorsal fin and the anal fin have a thick, serrated hard spine. The sides of the body are golden yellow, and the lower leaf of the tail fin is orange-red. Carp usually live on the bottom of water bodies with dense aquatic plants in rivers, lakes, reservoirs, and ponds, and mainly feed on benthic animals. It has strong adaptability, is cold-resistant, alkali-resistant, and resistant to hypoxia. It can lay eggs in flowing water or still water, and the spawning sites are mostly in aquatic plants, and the eggs adhere to the aquatic plants for development. Carp is one of the freshwater fishes with the most varieties, the widest distribution, the longest breeding history and the highest yield.