How to raise prawns? culture techniques and matters needing attention

The nutritional value of prawns is still very high, so many people more and more like to eat prawns and often make prawns at home. . The shrimp meat of grass shrimp has the functions of tonifying kidney and strengthening yang, dredging milk and anti-toxin, nourishing blood and fixing essence, removing blood stasis and detoxification, replenishing qi and nourishing yang, dredging collaterals and relieving pain, appetizer and phlegm and so on. So basically everyone can eat it. Next, I will briefly introduce some culture techniques of grass shrimp to you.

How to raise prawns

The main results are as follows: 1. The feeding amount should be accurately and reasonably fed according to the physiological needs of each growth stage and the living condition at that time. The daily feeding amount of grass shrimp (formula feed) is generally calculated according to the weight of each tail. 1g body weight, 16% of the body weight, 14% of the body weight, 14% of the weight, the weight of 3G, the weight of 12%, the weight of 5g, the weight of 10%, the weight of 8g, the weight of 8%, the weight of 15g, the weight of 20g, the weight of 6%, the weight of 5g, the weight of 20g, the weight of 30g, and the weight of more than 30g is 4%.

2. Disease prevention and control should give priority to prevention. It was disinfected every 15 days in the early stage, every 10 days in the middle stage, and every 7 days in the later stage, and disinfected in time after strong wind and heavy rain, and the water quality was abnormal in time. In addition: pay attention to regular pond patrol, observe the activities of shrimp, find problems and deal with them in time.

Culture techniques and matters needing attention of grass shrimp

1. The pond should be built in the zone with flat terrain, less silt, sufficient water source, good water quality, no pollution and convenient access and drainage. The area of sediment bottom is 5-8 mu, the water depth is 2m, and each pond is equipped with 2-3 2.2kw aerators. The old pond should remove the sludge and weeds or plough and expose the bottom of the pond.

2. 20 days before seedling release, 15-20cm bubble pond was injected into the pond, and pond cleaning agent was used to sprinkle the whole pond to kill enemy microorganisms. For some newly excavated ponds and some aging ponds with poor water exchange capacity, in order to prevent the explosive reproduction of harmful algae in the middle and later stages of culture, attention should be paid to the use of algaecide in advance, such as algal king, Fucaojing and other drugs to kill harmful algae at the bottom of the pond.

3. The use of shrimp Terry has a comprehensive effect. Once the shrimp Terry was put into the pond, the diatoms were cultured in 2-3 days. After cultivating the basic biological bait, the water quality meets the requirements before releasing seedlings.

4. Do not release seedlings in bad weather. Seedlings should be planted at 8: 00 a.m. on a sunny day or at sunset in the afternoon, not at noon. Don't rush to release seedlings until the pond is cleared thoroughly. Do not release seedlings in shrimp ponds with bad water color and poor water quality.

What do prawns eat?

1. Grass shrimp belongs to omnivorous shrimp, which is not strict with bait. Young shrimp feed on plankton, followed by aquatic insects, plant fragments, organic debris, corpses of aquatic animals and so on.

2. Under the condition of artificial culture, grass shrimp can eat all kinds of fish bait (rice bran, raw bran, bean cake, clam meat, snail meat and fish meat), especially fermented feed such as distiller's grains. When there is not enough feed, they will eat each other. Negative phototaxis to light, lurking in the shadows during the day, feeding and activities at night. Therefore, most of the feed is put into the dark.

3. Grass shrimp, the type of forehead tooth is 7-8-2-3. The head and chest nail has antennal thorns, liver thorns and upper gastric teeth, no forehead and stomach ridge, and the liver ridge is obvious and straight. The lateral sulcus of the frontal horn is short and cannot exceed the middle of the breastplate backward. The fifth step is the foot without outer limb. The body is alternately arranged by dark green, dark brown and light yellow spots to form bright markings on the abdomen.

How big can the prawns grow

The main results are as follows: 1. Grass shrimp has strong vitality, delicious meat and large size. It is the largest species in the genus Penaeus. The largest female shrimp is 33cm and weighs more than 500g. There are two pairs of small pincers, the inner surface of the two fingers is sunken, slightly spoon-shaped, and the end of the spoon finger has brush-like bristles (bristles), which is a sharp tool for scraping algae, so it is often eaten by scraping algae, but the ability to remove algae is not equal to that of algae shrimp. The body color is extremely changeable and will change color according to the environment.

2. Under certain circumstances (the female shrimp is frightened and the water quality changes suddenly), the female shrimp may kick off the eggs in the abdomen, or directly molt and throw away all the eggs (the eggs stick to the swimming feet in the shrimp's abdomen), or the female shrimp holding the eggs may die accidentally.

Just now and you briefly introduced, some grass shrimp culture techniques and matters needing attention. In fact, with the improvement of people's living standards, everyone has the ability to buy some good food, so there are still great commercial prospects for grass shrimp farming. After all, it is also a healthy green food.