Fry spring early winter fishing

Early spring frying can not only enable fish to open food in advance, extend the growth period, and increase yield. Moreover, due to the low temperature in early spring and less fry activity, it is not easy to be injured during fishing, transportation and delivery, and has a high survival rate. It is usually suitable to put it in from February to April. 1? Pond harm: Before putting the fry, the pond should be drained, the debris in the pond should be removed, and the bottom of the pond should be leveled to repair and reinforce the pond foundation. Dredge irrigation and drainage channels. If there are fish ponds that do not use dry water, they must be washed with fine nets to clean the wild fish, and then use 20 g of bleaching powder per cubic meter or 1 meter of water per mu to use 75 to 100 kg of quick lime. After the water is dissolved, the whole pond is sprinkled with water. . 2? With polyculture: ample fertilizer, fertilizer quality of the pond, you can set turtles, squid; concentrate more fish ponds can be raised squid; rich fish ponds can be set grass carp. Stocking densities are 300 to 500 per acre, and management techniques are good for stocking between 800 and 1,000. 3? Fertilizer water quality: Based on the application of base fertilizer, generally every one week or so per mu of fish ponds into the human feces 50 to 100 kilograms, the fish is not floating for the degree. Fertilizer should be thoroughly cooked before going down the pond to prevent deterioration of water quality. 4. Strengthen Feeding: In the months of May to May, green feed should be used as the main ingredient, and appropriate amounts of vitamins and flour, cakes, bran, bran and other concentrates should be supplied. Feed twice a day and eat it 2 hours after feeding. Concentrates should be placed after feeding 1.5 to 2 hours of green feed. They should be fed once a day or in the afternoon. It is advisable to eat it after about 1 hour after casting. 5? Prevention of fish diseases: First, food disinfection, usually pay attention not to feed moldy feed, such as manure, add 800 grams of bleach per 120 kg and stir to feed, and other feed plus terramycin powder 1.5 grams per kilogram mix, Even feeding 2 to 3 days can prevent bacterial fish disease; the second is disinfection of the food field, with 40 grams of bleaching powder mounted next to the table, 2 weeks. Lime water can also be splashed in the whole pool.