Making use of Resources to improve the benefit of Shrimp Culture

Use plastic greenhouse to cultivate early propagation shrimp seedlings, raise pre-Roche shrimp from May to mid-August, raise Roche shrimp from mid-August to October, or raise Roche shrimp from June to September, and season green shrimp from October to May of the following year. In this way, two seasons of shrimp culture in one year can make full use of the water surface and feed resources, and greatly improve the efficiency of shrimp culture.

Roche shrimp

1. Choose Tangkou. Shrimp ponds are required to cover an area of 810 mu, with abundant water sources, good water quality, water depth of more than 2 meters and slope ratio of 1 ∶ 25. The newly opened pond will also open a shrimp gathering ditch 4 to 6 meters wide in the middle of the bottom of the pond to facilitate fishing and build a high irrigation and low discharge drainage system according to the scale of culture.

two。 Do a good job in the cultivation of shrimp seedlings. ① raised Roche shrimp for two seasons: the plastic greenhouse should be built ahead of time, early propagation shrimp seedlings should be purchased at the end of March and the beginning of April, and intensive cultivation should be strengthened, and strive to reach 3cm in mid-late May to ensure the stocking needs of the first season. At the same time, Roche shrimp was purchased in mid-late May and cultivated in a special pond. the specification of Roche shrimp reached 3 cm after mid-August for release in the later season. ② raised Macrobrachium rosenbergii in the previous season and then raised the green shrimp in the second half of May. In the first ten days of June, the breeding pond was selected, several small cages were set up, and the egg-holding green shrimp was released. At the end of September, the size of the shrimp species reached 3 cm.

3. Reasonable stocking. In the two seasons, 8000-10, 000 shrimp were planted per mu in the previous season and 10, 000-12000 per mu in the later season. In the previous season, 20 000 ~ 25000 Roche shrimp seedlings or 10 ~ 15000 shrimp species were released per mu in the previous season, and 15000 ~ 20 000 shrimp per mu in the later season. Before stocking, the cleaning and disinfection of shrimp ponds should be done well, cultivating basic bait, transplanting aquatic plants and so on. Shrimp stocking choose sunny morning, the temperature difference can not be too large.

4. Feed. To raise two shrimps, you can feed Roche shrimp and green shrimp series formula feed respectively. Feeding Roche shrimp, the feed in Taihu area is mainly snail, clam, clam meat, supplemented by formula feed, other areas mainly formula feed, supplemented by small fish and shrimp. Usually in the juvenile shrimp stage, the protein content in the feed is more than 35%, while the adult shrimp is required to be more than 32%. The amount of feed fed in the evening accounts for about 70% of the whole day's feed. The feed is put in the deep water area during the day and in the shallow water area at night, with regular, fixed-point, quantitative and qualitative feeding, and the daily feed dosage. Roche shrimp accounts for 5%-10% of pond shrimp body weight, while green shrimp accounts for 3%-5%.

Green shrimp

5. Water quality management. From May to June, the water depth of the pond should be kept at a depth of 0.8 meters at the initial stage of shrimp fry or shrimp stocking; during the high temperature season from July to September, the pond water should be filled with hot summer and muggy autumn, and fresh water should be injected once every 7-10 days according to the water quality. Usually do a good job of water quality testing and pond patrol.

6. Start the arrest at the right time. Two seasons of Roche shrimp were caught in early August in the previous season and in early October in the second season. The former Roche shrimp after the green shrimp, since mid-August, Roche shrimp catch large to stay small, stages and batches on the market, green shrimp until May of the following year to catch and list, if there are conditions, you can use the plastic greenhouse temporary culture method, select part of the commercial shrimp to be sold around the Spring Festival.