What is the best way to put shrimp seedlings?

So far, most shrimp farmers have completed the first shrimp production, and many have entered the second shrimp production. When purchasing shrimp seedlings, the shrimp seedling farm should choose a shrimp seedling factory with high capacity, large scale of operation and sound equipment, and it is best to have a good reputation, convenient transportation and close spacing.

Accurate measurement and disease detection of water body in shrimp pond

Accurately measure the temperature, salinity and pH value of shrimp pond, and the difference between them and the water quality index of the pond to be put should not be too much. Random sampling of shrimp seedlings for nucleic acid detection, shrimp seedlings with virus can not be asked.

Specification for high quality shrimp fry

Model and body color. The body length of Penaeus monodon is about 1.2 cm, and gray-black is the best. South American white shrimp is about 0.8 cm long, and it is best to be completely transparent. Shrimp seedlings are fat, meticulous in shape, smooth in skin, without appendages, no damage and deformity, and the colonies grow evenly and neatly.

Shrimp has round muscles, full intestines and stomach, flexible jumping, and dexterous stimulation response when opening to the outside world. The edge of the breastplate of shrimp is not rolled up, the eyes are clear and symmetrical, the eye stalk is open, the antenna is closed, and the tail fan is extended. Shrimp larvae have strong ability to swim against the current and touch the wall, which can be quickly and evenly distributed in the electrolyte spoon in Miao Zhuang.

Buy shrimp seedlings

Two days before buying seedlings, 30-50 healthy shrimps are cultured in a 40-mesh net cage in the pond 1 m2, and the survival rate of free-range culture for 24 hours is over 90%, otherwise the pond water body is not suitable for seedling release. Buy shrimp seedlings in the same batch, preferably in the same pond. Count the number of seedlings as accurately as possible and buy enough at one time.

Transport shrimp seedlings

Before transporting seedlings, it is necessary to master the weather changes and choose sunny transportation.

Water the shrimps before you put them in.

In the whole process of shrimp culture, it is necessary to fertilize water to shape the basic bait microorganisms before releasing shrimp seedlings. Feishui believes that phytoplankton in water can maintain proper density and rich development, and many of them absorb the basic metabolites (nitrogen and carbon dioxide) in water quality and produce oxygen, which promotes the circulation of conventional substances in water quality, thus realizing the self-upgrading of water quality. Fermented organic fertilizer and biological fertilizer can be used in new shrimp ponds, and microbial fertilizer, plant fertilizer and inorganic fertilizer can be used in old ponds or mud ponds.

5-7 days after fertilization, water can generally be replenished, and fertilization should be terminated when the water surface transparency reaches below 30 cm; In the second half of culture, according to the difference of water color and transparency, the water color and transparency were supplemented and topdressing respectively, so that the water color and transparency could meet the requirements of seedling release and water body during culture. According to the fat water, excellent water color and transparency are created, which is the basis for the success of shrimp culture. In the process of fertilizing water, flora (such as the source of Corynebacterium) can be added to accelerate the dissolution of soil organic matter, improve the effect of fertilizing water, and keep the water quality fertile for a long time.

Properly handle the problem

Prawn culture must ensure the daily inspection of ponds, and one of the key contents of pond inspection is to observe the color and transparency of water. Minor changes in water color and transparency must be handled properly in time; This work can be simple or complicated. The reason is that if experienced shrimp farmers understand the need for water color and transparency in shrimp farming, they can deal with it in a timely and proper manner in a spirit of racing against time. The method is very simple and the cost is very small. Adjust the color and transparency of water to restore the color and transparency of excellent water.

On the other hand, if we don't know enough about this matter and don't handle it properly, when the transparency in the pond is amplified or turbid again, the problem will happen, and it will take some time to restore the original water color and transparency. Spending money may not have actual effect, and the damage is likely to be very large, even leading to unsuccessful shrimp culture. There are many examples in these aspects, which should be taken as a warning. This is very important for shrimp farmers who are raising prawns for the first time.