Culture technology of Macrobrachium rosenbergii

Macrobrachium rosenbergii, also known as Malaysia prawn, freshwater long-arm prawn, is a large freshwater shrimp, native to Southeast Asia. It has the advantages of fast growth, wide diet, good meat nutrition and short culture cycle.

First, build a shrimp pond

Shrimp ponds should be built in places with sufficient water sources, with a water depth of 1 to 1.5 meters, with a flat bottom, good impermeability, rectangle, east-west direction, and 1 mu of water.

Second, make good preparations

1. Thoroughly clear the pond

Shrimp seedlings before stocking with quicklime or bleach thoroughly clear the pond disinfection, kill Loach, wild fish, frogs and so on.

two。 Set up attachments and concealment

Branches, nets and tiles should be placed in the pond, and aquatic plants should be planted for shrimp seedlings to attach. Attached and concealed objects account for less than 20% of the pond area.

3. Fertilizing water quality

3-5 days before stocking, 30-50 cm of water was injected and 700-1000 kg / mu of cow, sheep and horse manure were applied to cultivate feed organisms.

III. Stocking of Shrimp seedlings

At the end of April or May, when the water temperature is more than 20 ℃, the shrimp seedlings should be physically strong, disease-free and neat. In the monoculture of Macrobrachium rosenbergii, 1000015000 Macrobrachium rosenbergii seedlings of 2cm can be raised per mu, and 8000,10000 Macrobrachium rosenbergii seedlings of 2cm per mu can be reared in mixed culture of fish and shrimp, and 120 silver carp and bighead carps that do not compete with Macrobrachium rosenbergii.

IV. Scientific feeding

Macrobrachium rosenbergii is omnivorous, zooplankton, aquatic insects, aquatic plants, algae; cakes, rice bran, bran and so on can be eaten. Generally feed egg yolk, soybean dregs, soybean milk and so on within 20 days after seedling release. From June to September, the protein content of the artificial compound pellet feed should be more than 30%, and the particle size and length of the feed should be 0.3 cm and 1 cm respectively. Generally, powdered feed should not be fed to facilitate the feeding of Macrobrachium rosenbergii. It can be fed 2-3 times a day, once in the morning and once in the evening (or plus midnight), and the night feeding amount can account for 2 times 3 times of the whole day feeding. In the main growing season, the daily feeding amount can account for 5%-7% of the total weight of shrimp in the pond. It is necessary to adhere to regular, quantitative and qualitative feeding, sprinkle evenly around the pond, and flexibly increase or decrease according to the weather and shrimp feeding and activities.

V. good management of water quality

Macrobrachium rosenbergii has higher requirements for water quality, so it is necessary to strengthen the regulation and control of water quality. The shrimp fry kept the water level at 40cm to 60cm one month after entering the pond, and then gradually deepened, reaching the deepest from August to September. When injecting water, we should use nylon sieve silk mesh bag to filter strictly to prevent enemy creatures from entering the pool. In summer, the water can be changed twice a week, each time to 15-20 cm, and to an aerator to adjust the water quality, generally the pool water is light green, oil green is better, found that the water quality is uncomfortable, change a large number of water in time. The transparency of water-saving water in the growing season is 25cm to 35cm. And should pay attention to timely removal of dirt, strictly prevent sewage, pesticide water into the pool.

VI. Strengthen disease prevention

Sprinkling quicklime to 20ppm once a month or bleaching powder to 1ppm once a month can prevent diseases.