Culture techniques of Jian carp

First, the cultivation of large size summer flower fish.

The cultivation of large-size summer flower fingerling refers to the process of building carp fry into black larvae, immediately raising them sparsely in ponds, and quickly raising them into 5-inch, 6-centimeter larvae in about 15-20 days. Large size summer flower fish species, can immediately carry out ponds, cages, fences and other adult fish culture, the same year can cultivate commercial fish.

1. Selection and cleaning of fish ponds. The selection and cleaning of fish fry ponds are basically the same as those of fish fry ponds, with an area of 0.1 to 0.3 hectares and a water depth of 1 to 1.2 meters. Before use, it must be carefully cleaned and thoroughly disinfected. two。 Apply basic fertilizer. In the five to seven days before stocking, the average amount of rotten manure per hectare is 45006000kg and green manure 3600 kg, or mixed compost made from 4,000 kg of animal manure, 4500 kg of green manure and 80kg of quicklime. 3. Fish fingerling is released. Fish species should be released as early as possible to prolong the growing period. The stocking density is 90000 to 120000 per hectare. Monoculture Jian carp generally does not mix with other fish. Fish species should be strong and neat in specification. 4. Feeding and management. After Wu Tsai went into the pond, because the fish was still small, he still needed to feed soybean milk for a few days. Soy milk is sprinkled and soybean dregs are fed twice a day by the pool. A few days later, it was fed with bean cake paste and placed in a fixed position by the pool, about 3-4 kilograms per ten thousand fish a day.

Second, the cultivation of one-year-old fish species

1. Fish fingerling is released. The cultivation of one-year-old fingerling of Jian carp is to cultivate summer flower fry (about 3 cm). After dividing the pond, about 150000 fish are released per hectare to form winter or spring fillet. Mixed culture can also be used, mainly Jian carp summer flowers, mixed culture of grass, silver carp, bighead carp and other fish species. Each hectare can be stocked with 90000 million fingerlings of Jian carp and 45,000,000 fingerlings of grass, silver carp and bighead carp. two。 Raise and manage. Jian carp is omnivorous fish, in addition to feeding concentrate, vegetable leaves and benthos, are their favorite food. Often feed Pingsha, the effect is also very good.

III. Adult fish culture

1. Pond conditions. The area of the fish pond should be 0.3 million hectares, and the maximum should not exceed 10 hectares. The pond that mainly raises Jian carp should be less than 0.5 hectare, the water depth is 2 to 2.5 meters, the water source should be adequate, and the water quality should be good. two。 Stocking and feeding management of fish species. Fish are usually released in winter or early spring. The summer flower fish were released in May and June. Free-range fish species should be physically strong, the requirements of stocking in the same pond are the same species, the specifications should be neat, and they should be fully released at one time. The high-yield adult fish ponds dominated by carp can breed 12000-18000 carp per hectare, with a small amount of silver carp and bighead carp, and the yield can reach about 7500 kg. 3. Build carp and raise it. Jian carp is generally used as a breeding variety in adult fish production. The high-yield adult fish ponds dominated by silver carp and the ponds with rich fertilizer sources and fertile water quality can mainly raise silver carp. The proportion of stocking is: silver carp 60%, bighead carp no more than 10%, grass carp 10%, mackerel and mackerel no more than 10%, Jian carp 10%. The high-yield adult fish ponds dominated by grass carp have abundant water resources, abundant water grass and dry grass resources or low price of grass carp pellet feed. Grass carp and blunt snout bream accounted for 60%, bighead carp accounted for 25%, silver carp accounted for 5%, and Jian carp accounted for 10%. The high-yield adult fish ponds with herring as the main culture, close to the Great Lake and areas rich in snail clams, can be raised mainly by herring. However, carp and herring eat the same feed, and there is a certain contradiction in food. Therefore, in the pond where the herring is mainly raised, the stocking specification of carp should be smaller, 10-15cm is better, and the quantity should not be more.