What do freshwater prawns grow up on? Where did you grow up? How long is the growth cycle? How to raise a high yield?

Grass shrimp, also known as black shell shrimp, Penaeus Monodon, is a common kind of shrimp of the shrimp family. It is widely cultivated because of its simple breeding, fast cycle and rich nutrition. At present, it is sold on the market, and the price is small. What do grass shrimp eat to grow up? Where did you grow up? How long is the growth cycle? How to raise a high yield?

What do you eat to grow up?

Generally speaking, there are carcasses of animals and plants, and shrimps such as plankton eat almost everything. They especially like to eat meat, such as fish, meat, clam meat and snail meat.

The place where it grows:

Grass shrimp belongs to river shrimp, which likes to inhabit aquatic plants and is located in rivers, lakes, reservoirs and ponds in China.

How long is the growth cycle?

It takes a month from spawning to seedling, 45 days to adult shrimp, about 80 tails per jin, 90 days about 20 tails per jin. Shrimp grows very fast in summer.

Culture techniques:

I. Pond conditions and cleaning

It is appropriate to choose freshwater ponds or shrimp ponds with an area of 3 mu and a water depth of 1.5 to 2.5 meters, with sufficient fresh water sources, no pollution and sandy bottom. Generally, cross-shaped shrimp collection ditches are dug at the bottom of the pond, with a width of 70 cm to 80 cm and a depth of 30 cm to 40 cm, so that they can be collected in the trench when the shrimp is harvested after autumn.

2. Fertilizing and cultivating bait

One week before stocking, the shrimp seedlings were filtered with 60-80 mesh sieve, 30 cm of water and 50 kg of basic fertilizer or 5 kg of urea per mu to cultivate the basic bait.

III. Shrimp fry restocking

In general, shrimp fry can be released when the water temperature is stable at 18-20 ℃ in late May. Shrimp seedlings need to be desalinated for more than a week, with a specific gravity of less than 1.003 before they can be released. Generally, 30,000 shrimp seedlings of 0.7-1.0 cm per mu are stored, and the seedlings below 0.7 cm need to be temporarily reared. A total of 80,150 silver carp species of 10 cm and 20 cm can be mixed in shrimp ponds.

Fourth, bait feeding

There is no need to feed the shrimp seedlings in the pond for one month, but mainly depends on the plankton in the pond. One month later, the compound feed was fed, supplemented by fresh fish, shellfish, etc., and the feeding rate was generally 3% or 5% of the shrimp body weight. The amount of bait can be increased appropriately from July to September, according to the principle that there is no residual bait, the number of bait is 2 to 3 times a day, the amount of bait in the daytime accounts for 3%, and the amount of bait in the evening is 3%.

Fifth, diverting water to prevent diseases

After 10 days of stocking, the shrimp fry began to add water gradually, adding 10-15 cm of water per week. Change water 20,30cm every 2-3 days in high temperature season. Every half month or so, the whole pool is sprinkled with 5 kilograms of quicklime to improve the water quality and bottom quality, as well as sterilization to promote shelling and growth. At the same time, 1 ‰ ~ 3 ‰ garlic bait should be mixed for 3 days at 15 ~ 20 days.

VI. Capture

General breeding 80 million 100 days, shrimp body length up to 7 million 10 centimeters, can be caught and sold according to the market situation.