Matters needing attention for high yield of cultured crucian carp

In order to obtain high yield and high benefit in pond culture of crucian carp, culture technology is the key. In the process of breeding, we should pay attention to the following aspects.

1. Distinguish the advantages and disadvantages of fish species. When purchasing crucian carp fingerling, farmers should distinguish the fake and inferior according to the biological characteristics of the species, and buy high-quality fish for stocking, which is the basis of high yield of crucian carp.

2. Stocking density of fish species. In order to reduce the cost of breeding, it is best to cultivate large-size fish species by yourself. Crucian carp fingerling was cultivated with ①, 0.8 ~ 12000 crucian carp per mu and 50g to 60g per mu. ② adult fish culture, the average size of fish species is 50g / mu, crucian carp fingerling 1500g / mu is suitable, commercial fish specification is 350g / mu.

3. Match the variety. Cultivate large-size crucian carp species not with grass carp and carp, but should choose silver carp and bighead carp, the number should account for about 20% of the main cultured crucian carp, bighead carp account for about 10% of silver carp. The stocking time of matching varieties should not be early, especially the early input of bighead carp has a greater effect on the domestication of crucian carp.

4. Domestication of fish species. Crucian carp is a kind of fish living in the middle and lower layers of the water body, and the fish ponds mainly raise crucian carp. The fish species are easy to float and eat after domestication, which can reduce the feed cost and improve the efficiency of fish culture. It is relatively easy to domesticate in the breeding stage. After domestication, it takes a short time for the domesticated fish species to float and grab food during adult fish culture, so it is easy to manage. Adding appropriate amount of additives to the feed during domestication can shorten the domestication time and increase the feeding area and quantity of crucian carp. The population is large and easy to domesticate, on the contrary, it takes a long time to domesticate. When the density has been determined to be constant, it can reduce the water level of the pond, and relatively increase the density, which is not only conducive to domestication, but also increase the water temperature of the pond, which is beneficial to the growth of fish fry. The water quality during the domestication period should be "thin" rather than "turbid fertilizer".

5. Feed particle size. Generally, when the size of crucian carp is less than 10 grams, the feed particle size is 0.5 mm; 1.0 mm when 10 grams; 1.5 millimeters when 30 grams; 2.0 millimeters when 75 grams; 2.4 millimeters when 150 grams; 3.2 millimeters when more than 300 grams. The feeding capacity of fish is affected by fish specifications and water temperature, so the feeding amount should be adjusted randomly according to the actual situation.