CATDOLL : CATDOLL: How to farm freshwater shrimp?

1. Clean up the silt and weeds. For shrimp ponds that have been raised for more than one year, the accumulation of residual bait and feces in the pond has made the pond water shallower and the amount of toxic substances increased. Therefore, before releasing the shrimp fry, the shrimp pond must be cleaned up with high standards and quality. The desilting area must reach 100%, and the water depth in the pond must be more than 1.5 meters. Then use bleaching powder to "clean up the weeds".

2. Fertilize the water and breed the bait, and add shrimps at the right time. In late April, add water to the shrimp pond to make the water depth reach 0.5 meters, and apply 2.5 kg of urea per mu. Make the algae and rotifers in the pond proliferate in large quantities to achieve the purpose of fertilizing the water and breeding basic bait. Around May 20, add appropriate amount of shrimps, 30,000 to 40,000 shrimps per mu, and make sure to add healthy and healthy shrimps.

3. Adjust the water quality. In the early stage of shrimp cultivation, the water is changed less frequently. When the transparency of the pond water drops to 15 cm to 20 cm, the water should be changed once, and the amount of water changed is 1/2 of the pond water. In the middle stage of cultivation, the water is changed every 10 to 15 days, and the amount of water changed is 1/4 of the pond water. The method of changing water is to drain the bottom water in the pond first, and then add new water. It is important to prevent mixed water shrimp cultivation, where one side is drained and the other side is filled. In the flood season with more rainfall, do not drain or irrigate on a large scale, but drain the surface fresh water to ensure that the salinity of the pond water is relatively stable.

4. Feed appropriately. Make a push net by yourself, sample 50 to 100 shrimps every morning at 5 am, and carefully observe the stomach and growth of the shrimps. At the same time, use a rotary net to measure the survival rate of the shrimps in the pond, so as to be cautious and feed appropriately. Feed the shrimps 6 times a day in the later stage of cultivation, feed them once before sunrise and after sunset, accounting for 40% of the daily feed amount, and feed them every 4 hours at night.

5. Prevent floating heads. We must insist on regular observation, strengthen water quality monitoring, improve disease prevention and control technology, timely and accurately analyze and grasp the water conditions, pond conditions, weather conditions, and shrimp conditions, so as to achieve early detection and early prevention. When midges, shrimps, and small fish are found, it means that there is a lack of oxygen in the water, which is a precursor to shrimp floating heads. At this time, we must keep the water active day and night, and we can also make artificial waves, artificial oxygen, throw ice to cool down, and put in oxygenators. Feeding should not be done in the second half of the night when it is easy to lack oxygen. Do not find that the floating heads stir up the sediment, which can only aggravate the death of shrimp.

6. Mixed culture of shrimps, shellfish and fish. Mixed culture of shrimps, shellfish and fish can not only greatly increase the utilization rate of pond area and feed, reduce the cost of shrimp farming, but also be beneficial to the development and growth of shrimps, increase shrimp production, prevent shrimps from floating to death, and increase the benefits of shrimp ponds.