When is the time to release crab seedlings?

The ideal stocking time is when the water temperature reaches above 8℃, so that crabs can forage in the pond, which can improve the survival rate of crabs after shelling for the first time. At present, it is best to achieve localized production of crab species. If crab species cannot be localized, one household will not be able to release crab species in spring. It is recommended to sign a seed supply contract with seedling producers in a unified manner, and put the seeds into storage when the water temperature meets the requirements in spring.

The time for stocking crab seedlings should be in mid-May, not too early or too late. Too early will easily lead to a high proportion of mature crabs, and too late will easily lead to small crab species. Before purchasing seedlings, you should pay close attention to the weather forecast to ensure that crab seedlings can only be purchased after 3-5 days of good weather. Good weather can ensure that the water temperature in the breeding pond is suitable and the water quality is good, which is conducive to the smooth metamorphosis of crab seedlings. At the same time, it is necessary to arrange the shipping time of crab seedlings, based on the principle of transporting at night and releasing seedlings in the morning, ensuring that the release time of crab seedlings is in the morning with sufficient sunshine, which can effectively improve the survival rate of transportation and stocking.

The time for raising crab seedlings raised in the field is generally from early May to mid-June each year. About 0.3-0.5 kilograms of crab seedlings can be released per mu of rice field; Put crabs at 5-10kg, 40-100/kg, or 80-160/kg, 4-8kg. Crabs should know the season of shrimp stocking and raise them in time. If stocked too early, the survival rate of shrimp seedlings will be directly affected due to low water temperature; if stocked too late, the growth period of shrimp will be relatively shortened, directly affecting the output, quality and efficiency of shrimp farming. Good weather can ensure that the water temperature in the breeding pond is suitable and the water quality is good, which is conducive to the smooth metamorphosis of crab seedlings.

Cold air attacks or prolonged rainy weather conditions should be avoided as much as possible. At the same time, it is necessary to arrange the shipping time of crab seedlings, based on the principle of transporting at night and releasing seedlings in the morning, ensuring that the release time of crab seedlings is in the morning with sufficient sunshine, which can effectively improve the survival rate of transportation and stocking. Cold air attacks or prolonged rainy weather conditions should be avoided as much as possible. At the same time, it is necessary to arrange the shipping time of crab seedlings, based on the principle of transporting at night and releasing seedlings in the morning, ensuring that the release time of crab seedlings is in the morning with sufficient sunshine, which can effectively improve the survival rate of transportation and stocking.