Ponds require a pond area of ​​3 to 8 acres, rectangular, water depth of 1.2 to 1.5 meters, pool slope ratio of 1:2 to 3, silt thicker than 20 cm. It requires fresh water, no pollution, rich dissolved oxygen, pH value of 6.8-8, and sufficient water supply.
Prepare 100-150 kg of clear lime per acre for the clear pond. Before the seedlings are planted, aquatic plants such as Elodea and Hydrilla verticillata are planted in the pond. The first squid seedlings are given enough basal fertilization 7 to 9 days before stocking to make the water color grayish brown or pink; the second sapling shrimp seedlings should be given enough basal fertilizer 5 to 7 days before stocking to make the water grayish green or off-white.
The time for the first seedlings to be put on the shrimps was 1 to 2 months. The above-mentioned year was mainly for juvenile shrimps. The specifications ranged from 500 to 1,000 tails per kilogram, and about 15 kg per acre. The second time, the time for the release of the young shrimps was from June to July, and the breeding shrimps were mainly stocked in the same year. The specifications were 1.5 to 2 centimeters, and 30,000 were placed per acre. At the same time, 100 catfish were used per acre.
The type of feed for feed can be selected according to local conditions. The rapeseed cake, bean cake, commercial pellet feed, homemade pellet feed, snail meat, and small trash fish are all available, and the feed is mainly concentrated feed and supplemented by animal feed. The daily feeding amount was 10% of the body weight of the shrimp and was fed twice a day. It was fed at 1/3 of the whole day at 7 to 8 am and 2/3 of the whole day at 5 to 6 pm. Sprinkle around the pond so that the shrimp can eat in a balanced manner.
Before fertilizing, the basal fertilizer was used to fertilize the water, and the water quality was maintained during the cultivation process, which was fertile, live, tender and cool. Every 20 days depending on the water quality, 100-200 kg of fermented and decomposed organic fertilizer is applied per mu.
Water quality control Water plants should not be overly dense, especially during the high temperature season. Corrosive water grass species should be dealt with in time so as not to damage the water quality. The transparency of the pool water is controlled at about 30 cm, changing the water "small in and small out."
Disease Prevention and Control Common diseases of crayfish are ciliate disease, water mold disease, gill disease and so on. Take prevention as the main method. Every 10 to 20 days, use 10 to 20 kg of lime water per acre for the whole pool to spill 1 time. Every 20 to 30 days, use the bromine chloride as a whole for the Quanchiposa.
Fishing was picked up according to market conditions and the growth of shrimp. The first batch of freshwater shrimp began to be caught at the end of April and was collected and marketed at the end of June. The second batch of freshwater shrimp began to be caught at the end of October and was collected and marketed around the Spring Festival.
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