Pond culture technique of grass goldfish

The appearance of grass goldfish is similar to that of Japanese brocade carp. It is a variety formed by mutation of red and yellow crucian carp in artificial rearing. It is the oldest species of goldfish. Because of its simple feeding conditions, low feeding cost, omnivorous nature and fast growth, it can be used for beginners to improve their culture techniques. Let's take a look at the pond culture technology of grass goldfish.

Pond condition

In the pond for breeding red crucian carp, the pond mouth area generally requires 5-8 mu, pond depth 2.8-3.0 meters, pond wall slope 12.5-3.0, effective water storage depth 2-2.5 meters. High-yield intensive ponds need to be equipped with aeration machinery with a power of 1.5 kilowatts of 3-5 mu.

Fish stocking

Before stocking, the selected ponds should be cleared with drugs to kill pathogens and enemy organisms. In order to improve the survival rate of aquaculture and the specifications on the market, the winter release of fish species should be promoted. The stocking density is generally 30-50 fish per mu with 1000-1500 fish per mu, plus silver carp and bighead carp (41) spring fillet. When fish are released, 3% salt water and 10 × 10-6 potassium permanganate solution are mixed and bathed for 10-15 minutes.

Bait feeding

In the ponds that mainly raise red crucian carp, the protein content of the feed is required to be more than 30%, and the daily feeding rate is 1-1.5% in April-May, 2.5-6% in June-August, 2.5-6% in June-October, and 2-1.5% in September-October. Among them, some green fodder can be fed appropriately from June to August. The bait should be fed at a fixed point, and 3-5 feeding tables can be set up in each pond. Bait 1-2 times a day, the specific amount of feeding, according to the weather and the actual eating situation of fish flexible control, generally with a little surplus before the second feeding.

Pipe water to prevent disease

In the production season, regular addition and replacement of new water is very necessary for the growth of red crucian carp. In general, fresh water is injected every 10-15 days in summer. The amount of new water added each time is 20-50 cm. When changing water, first drain and then advance, that is, first drain from the bottom of the pond, and then add water to the surface of the pond, and the change of water should be carried out at noon. At the same time, adhere to the sunny day at noon to turn on normally for 1-2 hours. For water quality management, in addition to turning off the medicine bath before the good fish species are put into the pond, strong chloroform is sprinkled in the whole pond every 10-15 days during the culture period. The drug concentration is 0.2 × 10-6-0.3 × 10-6. In the high temperature season, add Ke Bu Ling and other internal medicine to the feed, the dose is 100g per 1000 kg of fish per day, 1-2 times a month, each time for 3-5 days, can effectively prevent enteritis, hemorrhagic disease and other fulminant diseases.