Crabs are generally collected from the beginning of October to the end of November every year, so the price is low and the breeding efficiency is not high. Due to shortage of goods before and after the Spring Festival, prices rose. The following describes a feeding method for crabs, which can be caught during this period and sold before and after the Spring Festival.
1. Select a pond with a water surface of 3 acres and a water depth of 1.5-2m. A shallower pond can be excavated into a "well-shaped" crab ditch. A small pond can also be used as an internet box for catching. At the same time, we must build anti-escape walls (nets). 20 days before the crabs were released, they were disinfected with quicklime or bleaching ponds.
Second, buy 1-2 autumn crabs with neat specifications, robust body, and no disease or injury, layered and packed in bamboo mats (baskets) soaked with puddles and straw bales, transported in one or two days. To Tangkou, spray water on the way. 350-550kg crabs are put into the water per acre.
Three, according to local conditions, select the bait, such as fruits, vegetables, bean cake, aquatic plants, cooked hawthorn, wheat and chopped small fish shrimp, cocoon, livestock processing plant waste, etc., before the daily feeding of crab weight 5 About 2%, late feeding 2% -3%, animals and plants bait with feeding.
Fourth, the depth of pool water should gradually increase as the temperature decreases. In order to ensure that the pool bottom maintains a high water temperature in cold weather, the water depth should not be less than 1.5m. The water should be changed frequently. When the water temperature exceeds 10°C, one-third of the pool water should be replaced every 7-10 days (large pool) or 3-5 days (small pool). When the water surface is icing in large areas, ice should be increased by oxygen. Small ponds should often increase oxygen.
Adopting the above method to raise crabs, the survival rate can reach more than 90%, and good economic benefits can be achieved.
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