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1. Reservoir selection. The Gonggonghu Reservoir has a catchment area of ​​3.4 hectares. When the water level is normal, the area of ​​fish farming is 3.8 hectares, the average water depth is 3.5 meters, the deepest depth is 8.7 meters, and the downstream irrigation grain field is 7 hectares.
2. Clear pond disinfection. Because of irrigation. The reservoir could not dry out. In early January 2002, 100 kg/mu quicklime zone was used for the depot disinfection.
3. Fish bream stocking. In early February 2002, stocking was carried out in October of the previous year with the insertion of a good-quality, disease-free one-year-old spinnaker of 1,000 pounds per mu. Hexa breeding bag hanging method, each size is 15cm x 40cm, mesh 2cm x 2cm polyethylene flat mesh bag placed horizontally down 4 river bream, mesh bag suspended in plastic floating On the raised polyethylene rope, the river is required to be about 15 cm from the water surface. At the same time, put appropriate amount of strong fish species, using polyculture. Before the rods are stocked, they must be strictly disinfected.
Second, feeding and management
1. Feeding and fertilizing. The river radon is dominated by plankton in drinking water, so fertilizing and cultivating water quality is particularly important. After clear ponds, 300 kg/mu of fermented duck dung was applied. After the fish pupa are stocked, they can input part of the fermented soil fertilizer or compound fertilizer according to their needs, using a small number of times, usually 3 times a month, depending on the weather and the color of the water, the transparency of the water is required to reach 30 cm, and each day must be cast. Feed the appropriate amount of ingredients and concentrates.
2. Giving lime. Quicklime can not only regulate water quality, but also disinfect water bodies. Each month, 30kg/mu of quicklime is used to sprinkle once after the water, and the high-risk season for river rafts is required to increase to 3 times per month.
3. Make timely inspections and make records. On the basis of good morning and evening patrols, we should conduct sampling inspections every day and make records; every half a month, we should check the entire river bank and remove the attachments on the two bags in time. According to different seasons, the water depth of the hanging net bag is adjusted by increasing or decreasing the float, and it is required to be deeper in the winter and summer seasons.
Key Techniques for Breeding Pearls in Small Reservoirs
First, the basic situation