Pond breeding and polyculture

In early 1996, Jinhu County undertook the task of constructing the “pond fishpond polyculture technology” key demonstration area issued by the Jiangsu Provincial Aquatic Products Bureau. After one year of implementation, it passed the acceptance by the expert group organized by the Provincial Fisheries Bureau at the end of 1996, and fully completed the contract. The prescribed technical and economic indicators have been built into a 500-mu demonstration area of ​​the provincial pond and fish polyculture.
Pond polyculture is an effective way to increase the overall benefits of pond fisheries. This technical point is briefly introduced.
1. The transformation and construction of ponds. The demonstration area is located in the Tugou town aquaculture farm. The original fish breeding pond is converted into a fish and polyculture pond. Each pond area is 5 to 15 mu, the average water depth is more than 2 meters, and the bottom sludge depth is about 25 cm. Anti-escape facilities are built around the pond. The materials used are bricks, cement boards, calcium-plastic panels, etc. The brick-based structure is mainly 40 cm above the ground. The top of the wall is 15 cm away from the pool. The wall is 50 cm high. Anti-theft anti-theft anti-theft plastic net. In order to solve the problem of eating oysters and fish, there is a saddle-shaped food table in the pool. Usually, one to two acres of water is set. This food table is used to feed quail feed. The fish cannot feed on the food table, and it can also serve as a sturdy table. The demonstration area is located on the bank of Gaoyou Lake. The water source is abundant, the water quality is good, and the environment is quiet. It provides good conditions for the polyculture of fishponds.
2, seed stocking. Demonstration area unified fish stock and young stocking mode, the fish pond before the stocking use quicklime 50 kg of water per day Quanchiposa. The fish stocks were all stocked at the end of March. The average mu stocking rate was 120.6 kg, of which filter-feeding fish accounted for 50%, grass and carp accounted for 35%, and carp and carp accounted for 15%. Fish species are sterilized with 3% to 5% saline or 10PPm bleach solution during stocking. From late May to early June, a total of 30,596 5,596 kilograms of puppies were stocked in the demonstration area, with an average of 61.2 pieces and 10.25 kilograms per mu, with an average size of 172 grams each. The stocking puppies are of neat specifications, robust in health, quick in response, quick in action, generous in skirts and carapace, non-injured, disease-free, bright and lustrous in color, and the basal part of the plastrons and limbs are preferably yellow. When stocking, use 20PPm potassium permanganate to wash the carcass for 5 to 10 minutes.
3, feeding and management.
1 feed feeding. The technology of polyculture ponds and fishponds is to use the ecological niche principle of ecological fishery construction. It will use the rafts to enrich the niche of the ponds, give full play to the niche efficiency, and improve the overall benefits of pond fisheries. Due to the small amount of larval stocking, the natural food in the pond can be fully utilized, and some artificial feedstuffs can be appropriately added, mainly including snails, fresh fish and a small amount of compound feed. The feed is fed on the saddle-shaped food table every day at 9 am Feed around. For every one kilogram of commercial clams produced, 5.71 kg of snails, 0.72 kg of fresh fish and 15.5 g of compound feed were fed. The feed for fish farming is dominated by commodity feed and artificially planted Sudan grass, and the feeding method is the same as conventional fish farming.
2 water quality management. Generally add water once every 7 to 10 days, add 20 to 30 centimeters of water each time, add water once every 2 to 3 days in summer and high temperature season, and splash 20 to 30PPm of whole limestone once every 20 to 30 days.
3 daily management. Adhere to a dedicated person on duty, sooner or later patrol pond inspection, a check of water quality conditions, the second check oysters, fish feeding conditions, whether the three check anti-escape facilities are damaged, four check whether the condition, and do a good job of flood control, wind protection, anti-stealth work.

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