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How to build a fish pond
First, shorten the front line and concentrate people, money and materials on the construction of fish ponds in key locations; The construction is completed one by one, and special attention is paid to the shaping and compaction of fish ponds. In the construction, recklessness should be avoided, and the stall should not be spread too large, otherwise the semi-finished project will be completed and the production and business activities will not be carried out. Secondly, the modeling of fish pond project is diversified. The shape of fish pond engineering is often rectangular and pit-like, so as to give full play to the three-dimensional benefits of aquaculture water. The area of a single fish pond can reach about 10 mu, the pond depth is 2.5-3 meters, the aspect ratio is 5: 3, the slope coefficient is 2-3, the ridge width is 5- 10 meters, and each fish pond is excavated about 5,000-6,000 cubic meters. The modeling of fish ponds can be easy first and then difficult, and some transitional fish ponds can be built, such as "hui", "high and low", "well" and "field", which is especially suitable for building fish ponds in low-lying lakes, swamps and beaches. Among them, "Hui" fish pond is the most ideal transitional fish pond. Third, the irrigation and drainage system should be timely and complete with water intake and drainage systems, including pumping stations, pumps, water intake channels and other water intake systems, as well as drainage systems such as culverts, ditches and drainage gates. In addition, there are fishing facilities combined with water intake and drainage systems. After the spring, due to the tight time, the breeding season is coming, so it is required to pay special attention to the construction of key parts in the overall deployment and arrangement of the project, such as the synchronization of irrigation and drainage system and fish pond construction. When planning and designing, the location of irrigation and drainage ditches should be reserved. In the concrete construction, we will focus on the construction of branch canals and bucket canals in the shaped fishing pond. The main canal, main canal and drainage ditch can be simplified according to rough conditions and left to be built when the project is completed. In terms of building forms and materials, open ditch is adopted, and masonry materials can be used to locate and shape the passage; If there is no positioning and no stereotypes, use earth channels. For the construction of fish-stopping facilities, it is best to use steel fences. The basic requirements are that (fish) can stop, (water) can go downstream and resist (wind and waves) impact. Fourth, ensure the supply of energy and electricity. Take the water surface 10 mu fish pond project as a production unit. According to the technical and economic index of the designed output of 750kg, the total output per mu is 1 kw, equipped with an aerator of 0.3kw, axial flow station 1 seat, power13kw and diameter10cm. And three submersible pumps with a diameter of 1.5cm and a power of 2.2kW, to ensure the high temperature season in July, August and September, and to exchange about 1/5 of pool water every day, so that the quantity and quality of pool water can meet the needs of fish growth. Fifth, scientifically choose the training mode. For newly-opened fish ponds, due to the light water quality, it is advisable to choose the cultivation mode of herbivorous fish as the main and omnivorous fish as the supplement, and appropriately cultivate filter-feeding fish.