First, cast enough food. The bait is mainly made of green material, supplemented by fine material. Green materials such as duckweed, Sudan grass, ryegrass, bitter leeks and so on. Concentrates are cakes, bean cakes, wheat bran, cornmeal, rice bran, cocoon, snail, bad residue and so on. Feeding amount every day, concentrate feeds 4-5 kilograms for 100 kilograms of fish; green feed for 40-50 kilograms for 100 kilograms of herbivorous fish and 65-80 kilograms for August.
Second, rational fertilization. For organic fertilizers such as humans and livestock, 100-150 males are used for each acre, applied once every 7-10 days; green manures such as green leaves and crops of crops, crops, and other crops are piled up in the shallow waters on the banks and pressed with stones. Sink into the water. Afterwards, it was flipped on the first 3-5 days to decompose it. Fertilizers use 1 kg of urea or 1.5 kg of ammonium sulfate per acre, first dissolved in water, and then evenly splashed on the surface of the water and applied every 5-7 days.
Third, adjust the water quality. One is to flush with new water. Generally, new water is poured every 10 days or so, each time adding 15-20cm of water. When pond water deteriorates seriously, it should be discharged 1/3 to 1/2. Then inject new water. The second is to stir the bottom of the pool and promote the continuous decomposition of organic matter at the bottom of the pool. Normally it is stirred once every 10 days or so. Each agitating area should not be less than 1/3 of the pond, and the stirring effect at noon on sunny days should not be less than 1/3 of that of the pond. The best stirring effect is at noon on sunny days. The third is to give birth to lime, usually with 15-20 kilograms of quick lime per sprinkling, spaced once every 20-30 days.
Fourth, prevent floating heads. In addition to regular adjustment of water quality, when it is predicted that a floating head can occur, it should be filled with new water or an aerator to increase oxygen, and at the same time stop fertilizing and control the amount of food and shorten the time for eating.
Fifth, comprehensive disease prevention. First, every 15 days on the shore and in the food field, 100-200 grams of strong chlorine extract per mu is used to disinfect the water. Once every 20 days, 300 grams of copper sulfate and 125 grams of ferrous sulfate are used per mu. Sprinkling water to prevent fish bacterial skin disease and rickets, etc.; Third, feed the first 2-3 times a month, according to the ratio of 100 grams of fish garlic head 500 grams, the garlic mash, mixed bait, feeding 3-5 days to prevent fish enteritis and other diseases.
Six, catch round. In order to reduce the fish density, in mid-to-late and late July, more than 0.5 kg of cockroaches, squid, and 1.25 kg of grass carp can be sold. At the same time, 0.1-0.2 kilograms of carp species 150-200 tails and summer carp 100-150 tails are added per acre pond as a reference fish species.
June-September is the peak season for fish growth, and special attention should be paid to good feeding management.