Putian fish culture technology

Make full use of natural conditions such as water, land, fertility, dissolved oxygen, light, thermal energy, and biological resources in Putian. Combine planting with aquaculture to achieve a good harvest of fish and fish. First, environmental conditions. Fish farms require good lighting, adequate water supply, and clear water quality. The water's PH value is 6.5-8.5, dissolved oxygen is not less than 3 mg/l, there is no industrial waste water pollution, water injection and drainage are convenient, and the soil layer is thick. Tian Hao maintains strong water, the flood is not submerged, and there is no shortage of water during the drought. Second, facilities. 1. Build Tian Hao. Rafts in fish farming fields should be raised, widened, and reinforced on the basis of the original. The earthworms are raised to 60-70 cm, widened to 40-50 cm, compacted or reinforced with plastic film. 2, excavation fish slip. Fish slip is a small pond that is excavated for fish farming in the lotus field. It is also called a fish pit. If fish species are raised, the fish slip area is about 4% of the lotus field area and 70-80 cm deep. For feeding adult fish, the fish slip area is about 9% of the lotus field area and 1 meter deep. The fish slip is generally rectangular and is excavated near the inlet of the field, which is advantageous for changing the water and feeding the food and preventing disease. 3, excavation fish ditch. The fish ditch is in contact with the fish and is the passage for the fish between the fish slip and the field. The area of ​​Putian is small, with a ditch or "10" shaped ditch running through the whole field; the area of ​​Putian is large, and the "Japanese" shape or "Tian" ditch is excavated. A gate is set at the fish ditch and the fish pass, so that the channel can be cut off according to production needs. 4, install the barrage. The fish traps are installed at the injection and drainage outlets of the fish farms to prevent fish from escaping from the inlet and outlet. The barn is made of bamboo foil or metal mesh, and should be 20 cm higher than the field ridge. It should be installed in a curved shape with its convex surface facing the water stream. The size of the barred hole is based on the fish size. If there is more slag or large area of ​​the slag in the water injection and drainage, a double barrage can be set, the fish can be trapped inside, and the outer layer can contain debris. Third, fish stocking. With omnivorous fish, eel, and tilapia, it is possible to raise a small amount of eel and make full use of biological feed resources such as insect larvae and plankton in paddy fields. With natural bait, about 15-20 kg of fish can be produced per acre. Can be stocked with 3-4 cm, 800-1000 tail summer flower breeding species, can also be stocked with 10 cm species 80-100 tail rearing fish, fed some artificial feed. Fourth, adult fish and fish species fishing. Adult fish and fingerlings, when fishing, use feed-feeding, eviction, or release of water, and fish are caught in fish slips and transferred to other waters for raising or selling. Jurassic tilapia raises tilapia, generally until the end of September to early October. When the water temperature drops to about 18 degrees Celsius, it must be completely taken out. The tilapia will be caught in the bottom of the mud by surprise and can use its gluttony and pleasing water flow habits to trap it with bait or running water.

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