Jian Jian adult fish breeding

There are many ways of rearing adult fish of Jian'an, mainly introducing the following four types: (1) Nutrient breeding in fish ponds. The fish breeding stocks are raised in the fingerling pool. The stocking density, specifications and feeding management of the fish fingerlings are carried out according to the routine, that is, to increase the production output of the Jianye without affecting the production of the fingerlings of the domestic fish and without increasing the feeding amount. income. Kenai's stocking specifications are about 3 cm, and the fish fingerlings should be more than 2 cm. The nesting density is usually 60-100 tails per acre, generally reaching the commercial fish size. (2) Polyculture in adult ponds. In the production of adult fish, Jianye is generally used as a breeding breed. In adult high-yielding ponds with mainly salmon, stocking rates are generally 60% for carp, 10% for carp, 10% for grass carp, 10% for carp and carp, 10% for carp, and 10% for carp. In adult fish breeding ponds, the stocking ratio is usually 60% for grass carp and head fish, 25% for carp, 5% for carp, and 10% for carp. There is a contradiction in food; in the high-yield, high-quality production ponds based on Jianye, the stocking amount of Jian'ou accounted for about 60% to 70% of the total amount. (3) Feeding in cages. The waters in which the cages are placed should be fertile but non-polluting, and should be sheltered from the sun and moderate in depth. It is good to be able to avoid the impact of floods on the Huhan Bay. Net cages for cultivating fish have a mesh size of 2-3 cm, and the general specification is about 60 square meters. The ideal size for stocking Jianye species is 50-70 grams/tail, and the stocking density is generally 5-10 kilograms/square meter or more. After the fish species are put into the box, domestication is started, and the amount of feed each time is less, which is mainly the artificial compound feed. The grain size of the feed should match the caliber of the fish, and the feed utilization rate is high. (4) Breeding in rice fields. Jianou is one of the main targets for paddy field farming. Rice and fish are often used in combination with rice and fish rotation in two ways. The rice fields for fish farming must be reconstructed, and the field ridges should be raised and reinforced to excavate fish ditch and fish nests, with convenient access to water outlets, and to place barriers. Rice and fish are used as both crops, that is, shortly after transplanting, 200-300 fish species are reared on an acre basis per acre, and reared for four months. Rice-fish rotation, that is to say, rice is planted in paddy fields to raise one-season fish. In rice fields where rice and fish are rotated, they can also be mixed, with 1-2 species of fish, in addition to single-cultivation. Due to the high stocking density of seedlings, feed and fertilizer should be properly fed. At ordinary times, attention should be paid to the escape of the field, and new water should be added in time.

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