Rochester shrimp meat is delicious, high nutritional value, the sales market has been increasing, these prompted the rochester shrimp aquaculture scale is getting bigger and bigger.
The following experience on the Rochester shrimp farming techniques are described as follows:
One, pond selection
Shrimp ponds should be built in a place with sufficient water, the water depth of 1 to 1.5 meters, the bottom of the pond should be flat, good seepage resistance, rectangular, east-west, 1 to 3 acres of the best.
Want to large-scale aquaculture Rochester shrimp, must choose a good pond.
The pond should be close to the water source, or every time you drain the water is very troublesome, the pond drainage channel outlet should be located in the bottom of the pond, so that it is convenient to drain the bottom of the pond sedimentation of the Rochester shrimp feces and feed discharged out to improve the water quality.
The quality of the water directly determines the quality of shrimp raised out of good or bad, so be sure to strictly control the safety of water quality.
Freshwater shrimp is suitable for aquaculture with rivers or reservoirs, where the water source has more organic matter and minerals, which is the best for Rochester shrimp.
Two, preparation
1. Thoroughly clear the pond
Shrimp fry stocked with quicklime or bleach before thoroughly clean the pond to disinfect, kill loach, wild fish, frogs and so on.
2. Set attachment, concealment
The pool should be placed branches, nets, tiles, etc., and planting water plants for shrimp fry attached.
Attached, hidden objects account for less than 20% of the pond area.
3. Fertilizer water quality
Shrimp fry stocked 3 to 5 days before the injection of 30 to 50 cm, Shi cattle, sheep, horse manure 700 to 1000 kg / mu, cultivate feed organisms
Three, shrimp fry stocking
In late April or May, when the water temperature stabilized at 20 ℃ above the stocking of shrimp fry, stocking of shrimp fry should be robust, no disease or injury, specifications neat.
Single Rochester shrimp, per mu can be stocked 2 ~ 3 cm shrimp fry 10,000 ~ 15,000; fish and shrimp mixed, shrimp-based, per mu can be stocked 2 ~ 3 cm Rochester shrimp fry 8,000 ~ 10,000 tails, with the bighead carp 50 ~ 120 tails do not compete with the marsh shrimp for food.
Four, scientific feeding
The Rochester shrimp is omnivorous, zooplankton, aquatic insects, aquatic grasses, algae; cakes, rice bran, bran, etc. can be ingested.
Generally feed egg yolk, soybean dregs, soybean milk, etc. within 20 days after the release of seedlings.
June to September feeding artificial with granular feed, feed protein content should be more than 30%, feed size and length of 0.3 cm and 1 to 2 cm, respectively, should not be fed powdered feed, in order to facilitate the ingestion of marsh shrimp.
Can be fed 2 to 3 times a day, morning and evening (or then add midnight) 1 time each, night feeding can be 2/3 of the whole day's feeding.
The main growing season, the daily feeding can be 5% to 7% of the total weight of pond shrimp.
To adhere to the timing, quantity and quality of feeding, evenly sprinkled along the pond around, and according to the weather and shrimp feeding, activities and flexible increase or decrease.
Five, water quality management
Rochester Island shrimp on the high water quality requirements, and therefore to strengthen the water quality regulation, control.
Shrimp seedlings into the pool after 1 month to maintain the water level at 40 ~ 60 cm, and then gradually deepen the water level, 8 ~ September to the deepest.
Water injection should be strictly filtered with nylon sieve silk mesh bag, to prevent hostile organisms into the pool.
In the summer, the water can be changed twice a week, each time to 15-20 cm, and should be an oxygenator to regulate the water quality, the general pool water is light green, oil green is good, found that the water quality is not good, timely and large amounts of water change.
The transparency of the water during the growing season is 25-35 centimeters.
And pay attention to the timely removal of dirt, prevent sewage, pesticide water into the pool.
Sixth, disease prevention and control
Splash lime up to 20ppm once every half a month, or splash bleach up to 1ppm, can play a role in preventing disease.