CATDOLL : CATDOLL: What are the main modes of shrimp pond farming?

What are the main modes of shrimp pond farming?

There are many modes of shrimp farming, but the basic modes are mainly farming and mixed farming. The main shrimp farming modes include double-season shrimp farming, fish-shrimp rotation farming, and rotation farming with Macrobrachium rosenbergii and Penaeus vannamei. Mixed farming is divided into mixed farming of shrimp in adult fish ponds, mixed farming of shrimp in fish ponds, and mixed farming of shrimp in crab ponds. The main modes are:

(1) Two-crop shrimp farming

In winter and spring, juvenile shrimps of about 3 cm in length are released, with a size of 2,000 to 3,000 per kilogram. 10 to 15 kilograms are released per mu, and the shrimps are raised until June. After the first batch of shrimps are caught, the pond is cleaned and disinfected, and the shrimp fry of the same year are released again in July for breeding. Two batches of shrimps can produce 70 to 90 kilograms of commercial shrimp per mu. (2) Release once and raise shrimp all year round

The same procedure is used for releasing young shrimp in winter and spring (1). The harvesting is basically finished by June of the following year, and the shrimps left in the pond are used for breeding and raising seedlings. Depending on the density of the shrimp seedlings, the seedlings can be harvested for release or sold. The shrimp seedlings left in the pond are used to raise autumn shrimps, and harvested when the pond is dry at the end of the year. The disadvantage is that it is difficult to control the number of shrimp seedlings left in the pond, and the sizes of the shrimps are uneven. The density is often too high, which affects the size of commercial shrimps. Rotational harvesting measures should be adopted to raise large shrimps and raise small ones. If the density is too high, the pond should be divided by pulling nets. (3) Mainly cultivate fresh shrimp, and raise fish species in combination

40,000 shrimp fry of about 1.5 cm in size are released per mu, and 800 summer carp and silver carp are raised in the trap, 400 bighead carp, and 20-30 silver carp are raised. This can control the fertilization of water, improve water quality, swallow some larvae, and control the density of shrimp fry in autumn. The output of green shrimp is about 50 kg per mu, and the output of fish fingerlings is 40-50 kg. If fish are raised in the trap, 80-100 green carp and silver carp fingerlings of 50-100 grams and 50 silver carp are raised in the trap, and the output of adult fish is 50-60 kg per mu. In the first half of the year, the pond can be used to raise one season of adult fish, or to raise spring shrimp. (4) Double rotation of green shrimp and tropical shrimp

The first crop is to culture tropical shrimps such as Macrobrachium rosenbergii or Penaeus vannamei, and the second crop is to culture freshwater shrimps. This is called the second crop. Macrobrachium rosenbergii or Penaeus vannamei must be stocked with early breeding seedlings, which can be temporarily raised in plastic greenhouses. In early to mid-May, when the water temperature stabilizes at around 20°C, they are put into the pond, with 40,000 to 50,000 shrimps per mu; harvesting ends in early to mid-August, with a yield of about 300 kg per mu. The second crop of freshwater shrimp seedlings cannot be normally released in July because Macrobrachium rosenbergii or Penaeus vannamei occupy the pond, and must be temporarily raised for one month. The temporary breeding specifications are made to reach 3 cm, and 25,000 to 30,000 shrimps are released per mu. The stocking ends in late August, with a yield of about 40 kg per mu. The shrimp seedlings left in the pond can still be used to culture a crop of spring shrimps, which must be harvested before the end of April. (5) Mixed culture of freshwater shrimp in river crab ponds

In winter and spring, 10 to 15 kg of young shrimps are released per mu, and they are caught and put on the market in June. The shrimps in the pond can be used to breed shrimp fry and continue to breed autumn shrimps. Depending on the number of shrimp fry, 10,000 to 20,000 shrimp fry can be added. If shrimps are raised in crab ponds, the yield per mu can reach more than 30 kg in two crops.

The history of the cultivation of yellow prawns

"Huangmei green shrimp" originated from the ancient "Lei Chi" at the junction of Hubei and Anhui - Yuangan Lake. The lake area is rich in water and has a variety of weather conditions. It is an ideal place for aquatic plants and animals to live and reproduce. Especially green shrimp. Huangmei green shrimp has a long and profound history. It has long been the first to sail, and its position in the aquatic family is very important. In the planned economy era, people did not know enough about the economic and edible value of green shrimp. Local residents caught a small amount of shrimp, either live or dried shrimp. In the late 1980s, some fishermen began to try to study and tap green shrimp resources, and transported them to Jiangsu, Zhejiang, Shanghai and other places in moderation, which was sought after by consumers. As time went on, the market demand for Huangmei green shrimp continued to increase, and the price also climbed all the way. People captured information and business opportunities from it, and bought shrimp cages and nets to fish in the lake, and modified cars to develop live transportation; opened factories to purchase and process fresh shrimp. According to incomplete statistics, from 1990 to 1998, the annual catch was between 500 and 800 tons, and there were as many as 9 processing plants, processing 300 to 400 tons of fresh shrimp annually. The main products include shrimp meat, shrimp balls, shrimp noodles, frozen shrimp, etc.