CATDOLL : CATDOLL: Many people don’t know how to build a native shrimp farm. How to build a native shrimp farm?

Choose a place with good ventilation, plenty of sunshine, close to water sources, good water quality, rich feed sources, quiet environment, convenient transportation and power supply. According to the actual production situation, the power supply often varies greatly. There must be a power supply (380 volts); ensure sufficient power supply and normal operation of drainage and irrigation machinery, feed processing machinery, aerators, and feeders; ensure that the power supply is not cut off or rarely cut off. Reduce the construction difficulty and construction cost as much as possible; facilitate aquaculture management, save labor, investment and operating costs. If the shrimp pond is built in a low-lying and flat place, it can minimize the amount of engineering, save investment, facilitate drainage and irrigation, and facilitate operation and management. The terrain plays an important role in the selection of crayfish. It is necessary to fully consider the windproof, drought-resistant and flood-resistant functions of the terrain, make good use of the terrain, and use solar energy and wind energy to increase production. If drainage and irrigation can be built, energy consumption in aquaculture can be saved.

When choosing the location of the crayfish pond, the quality of the crayfish pond needs to be tested. The crayfish breeding base should not be built in soft sand or soft sand. Crayfish have the habit of digging holes, and digging holes in soft sand or soft sand is prone to collapse. Once collapsed, the crayfish will be repeatedly repaired, consuming a lot of physical strength, greatly affecting the growth, mating, spawning, hatching and reproduction of crayfish, and even affecting the survival of crayfish in winter. The location of the shrimp pond also has certain requirements for the chemical composition of the shrimp pond. The shrimp pond should not contain too much iron. Iron ions form colloidal iron hydroxide or iron oxide in water, which is reddish-brown precipitation and attached to the gill filaments of crayfish, which is not conducive to the breathing of crayfish, especially for shrimp egg hatching and young shrimp. In addition, when using wasteland to build shrimp ponds, pay attention to whether there are toxic and harmful substances in the soil, and it is not advisable to build shrimp ponds in areas where industrial waste is buried. Design of import and export of crayfish farms. Barriers should be set at the entrance and exit. The former can prevent miscellaneous fish from entering the pond, and the latter can prevent crayfish from escaping. The design of the outlet should be able to control the water level. In order to drain the pond water in time, the waterway needs to be trimmed. Oxygenation and running water can prevent crayfish from being lost due to lack of oxygen.

The construction standards for new crayfish ponds follow the principle of local suitability and aim at economic applicability. In order to meet the basic technical requirements of crayfish farming, the construction requirements and additional cost investment should be reduced as much as possible, and the best choice should be made in combination with the corresponding crayfish farming model. The construction of crayfish ponds should be combined with the living habits of crayfish, the convenience of farming and manual operation. The direction of the crayfish pond should be adapted to local conditions. It is best to choose an east-west direction, which is conducive to the lighting of the crayfish pond and avoid wind and waves. The width of the pond is maintained at 28-32m, the length-to-width ratio is about 5:1, and the area is 5-6 acres. This width is a suitable width for crayfish farming, which is convenient for daily feeding management, spraying, etc. It is also a suitable length for the arm length of a conventional excavator. The bank can be made by digging left and right, without secondary digging, and without wasting labor.

The width of the ridge surface in the pond should be maintained at 0.8-1.0m, the slope ratio is 1:2-2.5, and the pond depth is 1.5-1.6m. Narrow ridges are conducive to land saving. The crayfish pond has small wind and waves, and the damage to the ridge is small. The slope should not be too large. When the water temperature is high in summer, the pool is too shallow, and the high water temperature affects the feeding of crayfish. The appropriate standard of the ridge effectively saves development costs. The bottom of the pond is arc-shaped, deep in the middle and shallow on both sides. When digging, the excavator digs the earth mound ridge, and only 5-8 meters of soil in the center of the pond is needed to naturally form the arc of the bottom of the pond. Designing a 2×1×0.5m water collection tank at the drainage end of the pond is conducive to controlling the water at the bottom of the pond when the pond is dried in spring. When excavating the pond, consider the area near the drainage and leave space for the access road. Don't save land too much and don't leave enough distance for the access road, which will lead to rework after the project is completed.

Prepare a small seawater breeding pond, put the native shrimp seedlings in it, and then prepare an oxygen generator, and that's it.

The construction of native shrimp farming sites must be well planned in the early stages, and attention must be paid to the temperature of the underground farming and the size of the farming site, which is very important for grain production.

1 The area of ​​the pond for freshwater shrimp farming is generally smaller than that of the seawater pond. If the pond is too large, it will be inconvenient to fish and manage. The pond area is generally 2-12 mu, the pond depth is about 2 meters, and the water depth is maintained at more than 1.3 meters. The shape of the pond is mostly rectangular, with a length-to-width ratio of about 2:1. The slope of the pond should not be too steep, with a slope ratio of 1:(2.5-3.0). The bottom of the pond is flat and tilted towards the drain, which is convenient for draining the pond and fishing. The silt is generally not more than 10 cm. The pond must be equipped with a complete water inlet and drainage system, with a 60-mesh silk mesh bag on the water inlet pipe, and a net must be set at the drain to prevent wild fish from entering the pond against the water to grab food and destroy the shrimp fry.

2. River water, lake water, river water, reservoir water or groundwater can be used as water sources for shrimp farming. Water quality standards are: ammonia nitrogen ≤ 0.2 mg/L, nitrite ≤ 0.01 mg/L, copper ion ≤ 0.01 mg/L, zinc ion ≤ 0.1 mg/L, lead ≤ 0.05 mg/L, chromium ≤ 0.1 mg/L, pH 7.5-8.5, dissolved oxygen 5 mg/L or more, and not polluted by pesticides, industrial wastewater and domestic sewage.

3. Using biological agents at a water temperature of 22-30℃ can make freshwater meet the standard in 1-3 days. In waters with severe heavy metal pollution, the survival rate of shrimp is low. Although the use of disodium ethylenediaminetetraacetic acid for complexation treatment has a certain effect, the cost is relatively high. Therefore, water sources with high heavy metal content are generally not suitable for shrimp farming.