The culture density of carp should be mixed with other fish properly.

It is suggested that the culture density of carp is about 3000 jin per mu, which should be mixed with about 300 jin of herring or silver carp and bighead carp, and the culture density of carp mainly depends on the water quality environment, climatic conditions and culture technology of the farm.

Culture density

According to the conventional culture methods, it is best to cultivate carp of about 3000 jin per mu in ponds, and it is best to mix with other fish of about 300jin. It should be noted that mixed culture of fish cannot be excessive. If you put too much, it is easy to have diseases, and the loss outweighs the gain in the later stage. Generally speaking, grass and silver carp and bighead carp can be mixed with carp. At present, some mature domestic farms can achieve the culture density of the four major domestic fish to tens of thousands of jin. However, the water quality, environment and climate are different in different regions, as well as breeding technology and investment are also different. routinely, each mu is generally about 3000 jin.

Matters needing attention in mixed culture

Carp is the main culture fish, the proportion of other mixed culture fish is the best at 6:4 or 7:3, the allowable amount of carp is about 90,180 carps per 100m2 of water, but because the carp are very competitive, so if not in the pond where carp are mainly raised but grass carp, the collocation specification of carp should be controlled at 25g / tail, and the number of carps should not exceed 15 per 100m2 of water, otherwise it will cause other fish to be unable to eat food.

How to improve the benefit of carp culture

1. Renovate the pond

Objective: in order to increase the water retention, increase the water level depth of the pond, expand the carrying capacity of the pond, and make the pond reach the condition of carrying high fish load, it is best to ensure that the water level depth is more than 1.5 meters on average.

Methods: according to the topographical conditions around the pond, first drain the pond water, and then dig the pond, the pond needs to be hardened, or directly spread the impervious film on the ridge of the pond.

2. Rational collocation of feed

In the case of high-density culture of carp, if there is no mature experience and technology, it is easy to slow down the growth rate of carp. At this time, we need to properly adjust the feed combination of carp to ensure that carp can grow commercial specifications in time and then go on the market.

Through the visit to several large carp farms, it is concluded that the combination of feeding carp expanded feed 151 tons in the early stage and 101 tons in the later stage has a good effect, which can not only ensure enough nutrition for carp, but also reduce the incidence of carp, improve their physique, and reduce the deterioration of water quality.

3. Aerator configuration

Raising carp with high density is easy to cause pond hypoxia, so the aerator is a necessary tool in the farm. There are four commonly used aerators: impeller aerator (daily aerator), microhole aerator (bottom aerator), surging machine (stirring bottom aerator) and water wheel aerator (pushing water to increase oxygen).

It is suggested that every 10 mu should be equipped with 5-7 3.0kw impeller aerators, 1 0.75kw surge machine, 1 2.2kw micro-hole aerator and 1 1.5kw water wheel aerator per 10 mu.

From 30 minutes before feeding to 30 minutes after feeding, the microporous aerator and water wheel aerator should be turned on, the surging machine should be turned on at noon on a sunny day for more than 3 hours, and the microporous aerator and impeller aerator should be turned on at night to ensure that the lowest dissolved oxygen 3mg/l is above. Only in this way can carp get enough oxygen.

4. Improve water quality

As the saying goes, fish culture should first raise water, water culture should first raise mud, prevention should give priority to prevention, prevention is more important than control, and culture is more important than prevention. This culture concept has been summed up by many farmers for a long time, and it is very reasonable. In the case of high-density carp culture, it is recommended to use alternately the regulation and control of algae and bacteria in aquatic products such as gold peptide, feed partner 2 and feed partner 4 on a regular basis to cultivate beneficial algae or fungi.

In the middle and later period of culture, sprinkle bottom modification net and nitrite net timely, improve the dissolved oxygen of water, improve the bottom quality, and maintain good water quality. At the same time, chlorine dioxide, bleach and other disinfectants are used for disinfection once every half a month to 20 days. Alternately use intestinal protection immune package (that is, the combination of Qishen powder, lactic acid bacteria and vitamin c) and liver and gallbladder protection package (that is, the combination of Sanhuang powder, vitamin c and Gandanshuling) to maintain the liver, gallbladder and intestines of crucian carp, so as to make crucian carp more healthy.