The winter crab pool is a large-scale crab pond, which means that most of the crab ponds are harvested from the end of November to the beginning of December of the current year, and to the idle period of May or early June of the following year can be used to farm a row of freshwater shrimp. Mu ponds can produce 2,530 kilograms of shrimp, an increase of about 800 yuan. This method is also applicable to the outbreak of crabs, especially the more severe shivering disease, resulting in extremely high mortality of cultured crabs, almost to the point where there are few ponds for crabs; or in some places this year due to flooding, large numbers of crabs escaped due to flooding. To make up for the loss, this type of disaster-damaged crab pool can also raise a pair of green shrimp.
1, pond preparation. After the crabs are harvested, 50 kg of tea cake per acre (because the tea cake has no effect on the pond crabs) will be soaked and soaked, and the whole pool will be spilled evenly to kill wild fish and harmful organisms in the pond; 200 kg of fermented manure or 45 kg of compound fertilizer is used to fertilize the quality of water to provide prawns with natural food.
2, shrimp stocking. In general, large-scale breeding of large-scale shrimp in polyculture or polyculture ponds, high density, and shortage of juvenile shrimp of market specifications before and after the Spring Festival are common. Specifications for the 13 cm shrimp seedlings, stocking 1015 kg per acre.
3, feeding and management. In December, the weather is cold. It is necessary to step up the inspection of the patrol ponds. If ice is found on the water surface, it is necessary to break the ice and increase oxygen in time to prevent the suffocation of the shrimp. From May to May, we must strengthen water quality management and determine the number of water changes and water changes according to water quality. Change the water time and select the eye-warming weather around 11 am to avoid excessive temperature difference between the old and new water. Regularly disinfect with bleach, strong chlorine and other drugs. Depending on the weather and water temperature conditions, appropriate feeds such as wheat flour, pancake meal and wheat bran are added, and appropriately increased meat feeds such as crushed snails can be fed, and conditions can be fed to feedstuffs.
4, fishing for sale. Usually catch in the middle and late May. At this time, most females with a body length of more than 5 cm have already hung eggs. You can choose to keep some of them as the parent of the breeding shrimps. The rest will be collected for sale and will be sold for the next cycle. (You can raise crabs, Macrobrachium rosenbergii or breed fish).
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