I. Pond selection and construction
1. Pond selection: The pond area is about 10 mu, the water depth is 2-2.5 meters, and the silt is kept below 20 cm. The pond rake does not leak, the water drainage is convenient, and the water source is good enough. The water quality meets the “No Harmful Food-Freshwater Aquaculture Water Quality Standardâ€. It is stipulated that aerators and feeders are fully equipped, and materials such as asbestos tiles are used to build anti-abandon facilities.
2, Qingtang water: 10 days before stocking, seedlings, 10-20 cm deep per acre clear lime with 125 kg clear disinfection to kill bacteria, parasites and wild fish. Disinfection 3 days after injection 60-80 cm water depth, fertilization per acre Fertilizer 250 kg fertilization water quality.
3, put snails: put fresh snails 50-100 kilograms per mu before the end of March, both as clams, crabs, shrimp natural food, but also to purify water.
4. Transplanting Water Peanuts: To implement the mixed fish and crab pond or fish and shrimp ponds, put a certain amount of water peanuts in the middle and four corners of the pond in March, accounting for 5-10% of the pond area. With ropes and stakes fixed, water peanuts can be used for crabs and lobsters to live in oyster shells, and can also be used as crab and shrimp bait (grass grass does not consume water peanuts), and the pond is lack of oxygen or splashes with drugs, crabs, lobsters can climb In water peanuts, reduce damage.
Second, seedling stocking
1, fish species stocking: grass-fish species, with the appropriate cockroach, cockroach and eel, do not put cockroach, blue and other carnivorous fish. 500 acres of grass carp ponds, 150-250 grams per acre 250-280 tail fish, with 10-12 tail / kg of squid 100, 8-10 tail / kg of squid 40, 16-20 Tail/kg cod 100-150 tails. Fish stocks are stocked before the end of February and can be soaked with 3-5% saline solution for 15 minutes before stocking.
2. Stocking of special aquatic products: (1) Stocking. In the polyculture ponds for fish and fish, from 30 March to the beginning of May, 30 to 40 calves stocked with 150-250 g per mu were stocked. (2) Stocking of crab species. Implementation of fish and crab polyculture ponds, before the end of March stocking 120-160 acres per kilogram of crab species 250-300. (3) Lobster species stocking. Implementation of fish and shrimp polyculture ponds, in mid-April, acre stocking 300-400/kg lobster larvae 5-6 kg. The seedlings are required to be disease-free, harmless, and neat in size, and they should be purchased as near as possible to avoid the decline in the survival rate due to long-term transportation. Lobster species are best cultivated and stocked with small ponds.
Third, feeding and management
1. Feed feeding: Generally, only fish feed is used, and quail, crab and shrimp are not fed separately. Cockroaches, crabs, and lobsters can feed snails and diseased fish in the pool, while shrimps and crabs can also feed on residual baits to increase feed utilization. The feed is mainly composed of granular compound feeds, which are fed with green and green feeds. The green feeds should be fresh and palatable. This feeding method can ensure comprehensive nutrition and meet the needs of grass carp growth. It is also good for purifying water and preventing fish diseases. Feed feeding should be carried out according to the principles of “four determinations†and “four observationsâ€, namely, “timing, positioning, qualitative, quantitativeâ€, “looking at the season, watching the weather, seeing the color of the water, and looking at the fishâ€. Every day at 8-9 am and evening, the formula feed was fed at about 3% of the body weight of the fish. The green feed was 30-50% of the body weight of the grass carp. It was better to eat within 2 hours. When feeding formula feed, pay attention to put some feed on the peanuts.
2, water quality regulation: to constantly maintain the quality of water quality and health, fresh water every 3-5 days to add about 10 cm, in order to increase the vitality of water, increase dissolved oxygen, increase the reproduction rate of plankton, to meet the needs of quail feed It also stimulates the rapid growth of aquatic products such as river crabs and lobsters. Weigh 10-20 kg of lime every 15-20 days to regulate the pH of the water, improve water quality, increase calcium, and meet the growing needs of crabs, shrimps, clams, and snails. According to the weather conditions, oxygen aerators should be turned on in time.
3, disease prevention and control: adhere to the prevention of prevention and control methods. Strict implementation of the "Guidelines for the Use of Fishery Drugs" and the prohibition on the use of national banned drugs. Mixed crabs, shrimp ponds, and banned crustacean-sensitive drugs such as trichlorfon and pyrethroids. Based on regular splashing of lime water, sprinkle bleaching powder, strong chlorine and other disinfectants regularly around the food market. The common fish diseases that are more harmful to grass carp are red pebbles, gill rot and enteritis. Oral and external use of a combination of treatment. Exfoliation is mainly based on strong chlorine, chlorine dioxide and other disinfectants, used for 2-3 days. Oral use of "three yellow powder" bait effect is better, for every 50 kg of fish with three yellow powder 0.3 kg (rhubarb 50%, Huang Bai 30%, 20% crushed Huangqi into crushed powder), mixed with the flour paste and mix in the feed Feed the fish for 3-5 consecutive days.
Fourth, finished product listing
According to the season and the growing trend of aquatic products, aquatic products that meet the marketing specifications will be listed and caught in time to regulate the density of aquatic products in the aquaculture water body, maintain the reasonable carrying capacity of the water body at all times, promote the growth of aquatic products, and increase production.
1. Fish listing: Beginning in September, it will timely list and market the listed sharks, and the dry ponds will be sold at the end of the year.
2. Listed special aquatic products: mixed lobster ponds, which will be used for about 50 days in shrimp species, can be caught in cages and other net cages to catch more than 10 cm of shrimps, catch large and stay small, and mix crab ponds from October. Began to use cages and other fishing gear to catch crabs, according to market conditions, timely marketing or temporary support; polyculture ponds, according to the need to use a shotgun to sell.
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