The most successful way to raise shrimp in soil pond, with precautions

Clear the pond: make sure the water depth is more than 1.5m, and use bleach to remove the field. Seedling: 30,000 to 40,000 seedlings per mu. Adjust the water quality: when the transparency of the pond water drops to 15-20cm, the water should be changed once. Reasonable feeding: prawns need to be fed 6 times a day in the later stage of cultivation. Matters needing attention: strengthen water quality monitoring and improve disease prevention and control technology at the same time.

First, clear the pond

1. The accumulation of residual bait and feces in the soil ponds that have been raised for more than one year has made the pond water shallower and the toxic substances begin to increase, so it is necessary to carry out high-standard and high-quality dredging work in shrimp ponds before releasing shrimp seedlings.

2. The desilting area should reach 100%, ensure that the water depth in the pond is more than 1.5m, and then use bleach to remove the field.

Second, throwing seedlings

In late April, water was released into shrimp ponds to make the water depth reach 0.5m, and urea 2.5kg jin per mu was applied to make a large number of algae and rotifers in the ponds multiply, which was conducive to achieving the purpose of fertile and water reproduction of basic bait. Around May 20, proper amount of seedlings were put in, 30,000 to 40,000 seedlings per mu, and healthy and disease-free shrimp seedlings were needed.

III. Regulation of water quality

The main results are as follows: 1. In the early stage of shrimp culture, the times of changing water are less. When the transparency of pond water drops to 15-20cm, the water should be changed once, and the amount of water changed accounts for 1-20cm of the pond water. In the middle stage of shrimp culture, the water should be changed every 10-15 days, and the amount of water should be changed to 1 × 4 of the pond water.

2. the method of changing water is to first discharge the bottom water in the pond, and then add new water, which needs to prevent the drainage on that side. In the flood season with more rainfall, there is no need for large drainage and irrigation, but to drain the fresh water on the surface of the pond water in the flood season. it is helpful to ensure that the salinity of the pond water is relatively stable.

IV. Rational bait

The main results are as follows: 1. A push net can be self-made. 50-100 shrimp can be sampled at 5 o'clock every morning to carefully observe the stomach and growth of prawns. At the same time, the survival quantity of prawns in the pond is determined by spiral net, and then the bait is given reasonably.

2. Generally, prawns are fed six times a day in the later stage of cultivation, once before sunrise and once after sunset, accounting for 40% of the daily feed, and once every 4 hours at night, accounting for 60% of the daily feed.

3. The amount of bait per day accounts for 80% around the pond and 20% on the beach, but there is no need to feed when the water temperature in the pond exceeds 30 ℃, when the dissolved oxygen in the water is low, when the water quality deteriorates, when the fog pressure is low, and 1 hour after the injection of new water.

V. matters needing attention

1. It is necessary to persist in regular observation, strengthen water quality monitoring, improve disease prevention and control techniques, timely and accurately analyze and master shrimp conditions, water conditions, pond conditions, and natural conditions, so as to achieve early detection and early prevention and cure. If midges and small fish are found to depend on time, it means that there is a lack of oxygen in the water, that is, the precursor of shrimp floating head.

2. At this time, it is necessary to invigorate the water day and night, and it is also possible to make artificial oxygen, artificial waves, ice to cool down, or add oxygen enhancers. It is not appropriate to throw bait when it is easy to lack oxygen in the second half of the night, and it can not be found that floating heads stir up sediment. This can only aggravate the mortality of shrimp.

3. Persisting in mixed culture of shrimp and shellfish and mixed culture of shrimp and fish can not only effectively improve the pond area and feed utilization rate, but also reduce the cost of shrimp culture, but also benefit the development and growth of shrimp, increase the yield of shrimp and avoid the death of shrimp floating head.