Technical conditions of crayfish culture in greenhouse in Heilongjiang Province

The technical conditions for cultivating crayfish in greenhouses in Heilongjiang are as follows:

1, the water quality requires that deep wells should be equipped when shrimp are raised in greenhouses, and groundwater should be replenished regularly during the breeding process. Groundwater is rich in mineral elements, which can alleviate the toxicity of nitrite. Be careful not to add external river water to avoid containing pesticides.

2, pool conditions When raising shrimp in greenhouses, it is necessary to clean up the silt and impurities in the pool, sprinkle quicklime for disinfection, and install an aerator and a waterwheel in the pool to fully stir the water body to reduce the pollution of organic matter to the feeding area.

3. In the process of shrimp culture in greenhouse with heat preservation facilities, the phenomenon of late spring cold will appear after seedling release. It is suggested that the greenhouse be equipped with a boiler, which can heat evenly, is not affected by voltage, and has a large heating water body and strong thermal insulation performance.

4. Precautions: The greenhouse is in a closed state, with less air exchange, low air pressure and high culture density. It is required that the water depth of the pool should reach more than two meters, and high-strength composite impervious membrane should be laid on the bottom and wall of the pool, and sewage pipes should be laid in the middle.