New fish pond three steps
To build a new pond fish culture, the pond should meet the following requirements as far as possible in order to achieve high and stable production. Newly built fish ponds should be constructed in places with sufficient water sources, good water quality, and convenient transportation. Generally, an area of ​​about 1/15 hectare is more appropriate. The depth of the fish pond should be maintained at 2 to 2.5 meters and the transparency should be 25 to 40 centimeters. Take the east-west rectangle as well. The ratio of length to width of rectangular ponds should be controlled at 5:3, and there should not be tall trees and buildings around the pond to avoid blocking sunlight and blocking winds.
First, the scientific site selection must first consider the issue of water resources. The water quality is better, and the amount of water should be sufficient. It is best to be near unpolluted rivers, lakes or reservoirs. If the pond is under the dam of the reservoir, it is necessary to refer to the surface water of the reservoir. If the underground deep well is used as the source of water, consideration should be given to the construction of an associated reservoir. The second is to consider soil issues. After a pond has been fished for 1 to 2 years, the bottom of the pond will be covered with a layer of silt, and the impact of soil quality on the water quality will be replaced by silt. Therefore, the core problem of soil quality is the problem of water conservation. If the selected site has a low groundwater level and the soil is sandy, the problem of water retention is important. Water can be laid by laying plastic film. The specific method is: cover the bottom of the pond with a layer of plastic film on the pool, press the soil on the plastic film with a pressure of 0.5 to 1 meter. Generally, it can be used for more than 10 years. The third is to consider the supply of food and energy, electricity and so on.
Second, a reasonable design is the fish pond area and depth. Larger fish farms have a relatively low benefit to simply feeding commercial fish, and they should consider designing some matching fry pools and fingerling pools. Therefore, the pond area and water depth should not be exactly the same. Generally, the fry pool accounts for 5% of the total water surface. The pool accounts for 25% and the commercial fish pond accounts for 70%. The second is the pool direction and pool embankment. Ponds should be designed to be east-west oriented with a length-to-width ratio of 5:3. The width of the pool dike: The main road is 8 to 10 meters, and the interval between banks is 4 to 5 meters wide. The slope of the pool is 1:1.5-2.5. If the slope is protected by stones or concrete slabs, the slope may be steeper. The third is the intake and drainage systems. Conditions to achieve self-flow and self-discharge as much as possible to reduce costs. At the same time, in order to prevent the disease from spreading with water, it should be avoided that the water in the pond flows out and enters Bengtang.
III. Construction Acceptance The construction items for the Yuchi construction project include excavation of the ponds, embankments, and construction of drainage channels, sluice gates and pumping stations. To ensure construction quality and regular completion, budgets should be prepared in advance and special personnel should be arranged. Site management. After the pond project is completed, it shall be checked and accepted according to the design requirements.
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