Pond fish culture technology

The scientific name for squid, which is famous for its warm water-based edible fish, has high nutritional value and is known as “Ginseng in Water”. It enjoys a good reputation both at home and abroad. Salmon is a kind of river-dwelling fish. Every year, the mature sexually friendly quail breeds in the deep sea to breed eggs. Seedlings in the spring to the estuary near the baiting, in the fresh water in the first year of growth, to the spring of the following year, can grow to 15 cm, weighing about 5 grams. Carp ferocious temperament, bulimia, active, nocturnal, strong phototropism, happy flowing water. When the water temperature is above 12°C, squid start feeding. White Pipa mainly feeds on zooplankton, aquatic insects, and organic debris. About 5 grams of pups began to prey on fry, 100 grams of body weight can catch small fish, shrimp. Chengyu staple animal feed. Artificial feeding, artificial feed can be fed. First, the cultivation of seedlings 1. Pond settings. The pond area can be about 0.5 mu. It should be installed in drainage facilities and 30-mesh screens should be installed to prevent the seedlings from losing water. The depth of the pond is maintained at about 80 cm. Conditions can be paved on the top of the pond embankment floor tiles, floor tiles extending into the pond out of 5 to 10 cm, the top of the embankment to the water to maintain a distance of about 40 cm to prevent seedlings to escape. 2. Pond disinfection. After clearing the pond, at least one week of sun exposure is required. If the time is sufficient, the bottom of the exposure pond should be cracked with silt. The bleaching powder of 150 kg of quick lime or 20 kg (containing 30% of available chlorine) per acre shall be sterilized in the first 10 days before stocking. One week later, the water was sterilized and fresh water was added. Seedlings should be tested before stocking. 3. Stocking density. About 0.1 kilograms per square meter of water is placed on the water. 4. Feeding of seedlings. In the first 4 days after the seedlings enter the pond, live leeches or red worms can be evenly fed in the whole pond. From the 5th day, the seedlings can be trained to feed from the original nocturnal food for the day, from scattered foods to concentrated food, and by eating natural live bait to eat artificial compound feed. The method is to build a feed table near the pond and hung a 60 watt light bulb above the feed table. Using the characteristics of seedlings at night to attract light, the seedlings are induced to feed. During the day, the shade is shaded on the feed table to create an overcast environment. It is also possible to lure the seedlings in the daytime to feed. After the seedlings develop the habit of concentrating on food intake, the feeding time can be gradually delayed from night to morning to daytime. After that, gradually increase the proportion of compound feed. The feeding time is generally the morning and afternoon of each day. The amount of daily feeding is 4% to 6% of the fish's body weight. Due to the different growth rates of the individual seedlings, every one month or so, a sparse sapling is performed, ie individual small seedlings are picked out and kept in another pond. 5. Water quality management. The water quality of the pond requires more than 5 milligrams of dissolved oxygen per litre, the transparency of the pool water is about 40 centimeters, the ammonia nitrogen content is below 2PPM, and the nitrite content is below 0.2PPM. In order to ensure the dissolved oxygen in the water, an aerator can be installed in the middle of the pond to increase oxygen. In order to maintain the transparency of the water, it is possible to mix some oysters, clams, cockroaches, and bonito in the pond, and mix about 50 fish per acre. At some intervals, a portion of fresh water should be replaced to reduce the content of ammonia nitrogen and amlodipine in the water. Second, adult clams When the clams grow to more than 50 grams, you can feed as clams. 1. Pond setup and disinfection. The pond set-up and disinfection requirements are basically the same as those for aquaculture seedlings, except that the pond area needs to be between 1 and 2.5 mu. The water depth is maintained at about 1 meter. 2. Stocking density. Generally, about 7,000 squid can be stocked with 50 grams per acre of ponds, and a small amount of filter-feeding or benthic omnivorous fish such as cockroaches, cockroaches, cockroaches, cockroaches etc. This can not only achieve the purpose of keeping the water fresh, but also improve the production efficiency per unit area of ​​the carp pond. 3. Feed feeding. Place several feed stations on each side of the pond. Put the artificial feed on the feed table so that the squid can feed. The daily feeding amount can be 2% to 3% of the fish's body weight. In order to avoid feed residue contaminating the quality of the water, it is usually advisable to feed it 15 to 25 minutes after feeding. 4. Water quality management. Carp grows well under water conditions with dissolved oxygen of 5 to 10 mg/l, pH of 7.2 to 9, and a transparency of about 20 cm. If the water changes to a dark brown, yellowish brown, or milky-white transparent color, it indicates that the water quality has deteriorated, and part of the old water should be drained and fresh water injected. If it is found that the carp is concentrated on the water and turns around the side of the pond, it means that the amount of dissolved oxygen in the water is insufficient. At this time, oxygenation of the aerator should be started. 5. Grading. Generally, it should be divided once every other month so that the squid raised in the same pond can be kept in uniform specifications and density. When sparse, you can use a smooth fish sieve compartment and sprinkle the fish with water to make them active and naturally slide across the fish screen compartment.

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