First, the choice of fish pond construction address The local pond angle fish breeding, fish pond construction site selection is critical, the quality of fish pond conditions not only affect the daily management, but also affect the economic benefits of farming. The location of the fish pond should be selected from the front of the house with water source guarantee, good water quality and convenient irrigation and drainage, which is convenient for daily management. At the same time, the pond should be as close as possible to the orchard or planted crop to fully exert the function of the trapping lamp. Second, the technical aspects of fish pond construction 1, can be selected according to the terrain to build a pond or to build a pool on the ground. The digging type built pool is beneficial to the stable temperature of the water division winter insulation, which is conducive to the growth of fish, but there must be effective drainage conditions. The practice is to dig into the ground about 70 centimeters. The ground is about 50 centimeters high with bricks. The depth of the pool is about 1.2 meters. The practice of building pools on the ground is to build a pool of about 1.2 meters high on the ground with bricks. The area of ​​the fish pond is preferably 10-20 square meters, and its shape is generally rectangular. 2. The fish pond should have upper and no drainage openings. The upper drain is located about 25 to 30 cm away from the pool wall. It is used to prevent flooding in the rainy season. The fish in the pond corner flees with the water. The lower drain is used for changing the water daily and for catching fish. 3, the fish pond is better with brick structure, the wall of the pool, the bottom of the pool with a smooth cement mortar, do not leak, the water depth is about 0.9 meters, the bottom of the pool put a certain number of tiles, tile altar as artificial cave, for the pond corner Fish inhabit. Third, the fish pond disinfection before the release of fry, the pool to be sterilized, there are two methods, one dry pool method, put dry or drain pool water, after the sun exposure Kimchi evenly sprinkle quicklime, 75g per square meter area, the first One day into the new water, place 4-5 days and then change the new water, and then put 2-3 days after the release of fry; Second, with the water method, each cubic meter of water with 220g of lime, the calcined pulp heat the whole pool Sprinkle and start to fertilize the water after the toxicity of lime disappears. There are two ways to check the disappearance of toxicity of quicklime: (1) Check the PH value of the water in the pool. If the PH value drops below 7, it means that the toxicity of quicklime has disappeared; (2) There is anhydrous helium in the observation pool water. The toxicity has disappeared. Fourth, fertilization water quality After the fish pond is disinfected, about one week before the stocking of fry, begin to fertilize the water quality. After the injection of water reaches 0.9, the biogas residue can be used as the base fertilizer for the fish pond, and about 250 g of biogas residue is put into the fish pond per square meter. Fifth, stocking fish fry 6b fry should be no injury, disease-free, healthy and lively. Fish species should be more than 3 cm in size and be as consistent as possible to avoid killing each other. In the daily management work, disease prevention work is particularly important, and fish disinfection must be done when the fry is released. The method is to dilute 1 kg of salt with 30 kg of water and soak the fry in salt water for 5 minutes before placing the seedlings. Put a small amount of pool water into a container before putting the seedlings, and put a few fry into the test; if the fry can live normally within one day, you can put the fry in the pond. It is advisable to have a stocking time in the sunny days, and 50-100 tails of fish fry 3–5 cm long can be placed per square meter.
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