How to raise shrimp in earthen ponds most successfully? With notes

SummaryClearing the pond: ensure the water depth is above 1.5m, and use bleaching powder to remove wild species. Stocking seedlings: stock 30,000-40,000 fry per mu. Regulating water quality: when the pond water transparency drops to 15-20cm, change the water once. Reasonable feeding: shrimp need to be fed 6 times a day in the late stage of grow-out. Notes: strengthen water quality monitoring, and at the same time improve disease prevention and control techniques.

1. Clearing the pond

1. Generally, in earthen ponds that have been used to raise shrimp for more than 1 year, the accumulation of leftover feed and feces has made the pond water shallower and toxic substances have begun to increase, so before releasing shrimp fry, high-standard, high-quality shrimp pond dredging work is needed.

2. The dredging area must reach 100%, ensure the water depth in the pond is above 1.5m, then use bleaching powder to remove wild species.

2. Stocking seedlings

In late April, fill the shrimp pond with water so that the water depth reaches 0.5m, and apply 2.5kg of urea per mu, so that algae, rotifers and other organisms in the pond multiply in large numbers, which helps achieve the purpose of fertilizing the water to breed basic feed. Around May 20, stock an appropriate amount of seedlings, 30,000-40,000 fry per mu, and disease-free, robust shrimp fry need to be stocked.

3. Regulating water quality

1. In the early stage of shrimp grow-out, the number of water changes should be small. When the pond water transparency drops to 15-20cm, change the water once, with the water change amount accounting for 1/2 of the pond water volume. In the middle stage of grow-out, change the water once every 10-15 days, with the water change amount being 1/4 of the pond water.

2. The water change method is to first drain the bottom layer of water in the pond, then add new water. It is necessary to prevent muddy-water shrimp farming where water is drained on one side and taken in on the other. During the flood season with relatively more rainfall, there is no need for large drainage and large irrigation; instead, drain the surface freshwater, which helps keep the pond water salinity relatively stable.

4. Reasonable feeding

1. You can make 1 push net yourself, sample 50-100 shrimp at 5 o'clock every morning, carefully observe the shrimp's stomach and growth, and at the same time use a cast net to measure the shrimp stock in the pond, then feed reasonably.

2. Generally, in the late stage of shrimp grow-out, feed 6 times a day. Feed once each before sunrise and after sunset, accounting for 40% of the daily feeding amount, and feed once every 4 hours at night, accounting for 60% of the daily feeding amount.

3. For the daily feeding amount, the area around the pond accounts for 80%, and the shoal surface accounts for 20%. However, when the pond water temperature exceeds 30 degrees C, and when dissolved oxygen in the water is low, when water quality deteriorates, when there is fog and low air pressure, and 1 hour after injecting new water, no feed is needed.

5. Notes

1. It is necessary to persist in frequent observation, strengthen water quality monitoring, and at the same time improve disease prevention and control techniques, promptly and accurately analyze and grasp the shrimp situation, water situation, pond situation, and weather situation, so as to achieve early discovery and early prevention and control. If midge shrimp and small fish are found approaching, it indicates lack of oxygen in the water, which is also a precursor to shrimp floating at the surface.

2. At this time, the water must be kept moving day and night. Artificial oxygen generation, artificial wave making, adding ice to cool the water, or applying oxygen-increasing agents can also be used. It is not suitable to feed when oxygen deficiency is likely in the second half of the night. Do not stir up the sediment when floating at the surface is found, as this can only worsen the shrimp mortality rate.

3. Persist in mixed culture of shrimp with shellfish and mixed culture of shrimp with fish. This not only effectively improves the utilization rate of pond area and feed, but also reduces shrimp farming costs, and is also beneficial to shrimp development and growth, increases shrimp yield, and avoids shrimp death from floating at the surface.