Two years of healthy and efficient breeding of shrimp

First, clear pond disinfection. According to the requirements for spring and autumn oysters (January to May and November and November), the ponds should be completely sterilized with 250 kg/mu of lime before the end of January and before the end of May each year. Deep can be increased appropriately. During the disinfection, the water level in the pool is kept at a depth of 10 cm to improve the clear pond effect.

Second, water plants. About 7 days after clear ponds, weeds such as Elodea and Hydrilla verticillata are planted. The planting area generally accounts for 1/4 of the pond area. The planting location is about 1 meter from the pond's shallow water slope.

Third, shrimp feeding. The first larvae were stocked before the end of January, and the larvae that were used were not able to reach the listed larvae by the end of last year. Each squash was about 3 centimeters in size and the amount of mu was 10 kilograms. The second prawn fry was bred and stocked in early June. The prawn seedlings were mainly stocked in the year of breeding. The size of each tail was about 2 cm, and the average mu larvae were about 60,000.

Fourth, feeding and fertilization. Normally 1-2 feedings a day, the first shrimp in the spring is started to feed at the end of March. In April, it is fed once a day in the evening. After May, it is fed twice a day and once in the evening at around 7:00. The amount accounts for 70% of the total feeding amount of the whole day, and another time before 5 o'clock in the morning, the amount of feeding accounts for 30% of the total feeding amount of the whole day. In the fall of the second season, the second-choting shrimp can be stopped feeding during the lower water temperature in the first half of November, and the rest of the day's bait feed amount is controlled to be 8-10% of the total amount of shrimp in the pond. Feeding should adhere to the principles of "four orders" and "four visits." The bait is mainly based on full-strength feed for shrimp, with a small amount of bean cake and wheat bran. Basal fertilizer was used to cultivate water quality before seedlings were released, and the water quality was maintained during the cultivation process to make them fertile, live, tender and cool.

Fifth, aquaculture management and disease prevention and control. (1) Water quality regulation: change the water 1 time every month before April, change the water 1 time in May-June about 1 week, change the water 1 time in 2-3 days in the hot season, change the water 15 centimeters each time, in case of rain or sultry days should be Increase the amount of water. At the same time equipped with two 0.75-kilowatt water-wheel aerators to keep the pool water-soluble oxygen. (2) Disease prevention and control: The first shrimp breeding period is in winter and spring, shrimp disease is less. During the summer and autumn, the incidence of the second shrimp was higher than that of the first. The prevention and control of diseases should be mainly prevention. In July, August and September, the high temperature weather should be splashed with quick lime every 15 days. Each time the water depth is 15 kg/mu. Every 20 days or so chlorine dioxide Quanchiposa, each amount of 0.2 grams / cubic meter.