The output of shrimp living in greenhouse has quadrupled.

There are many people raising Penaeus vannamei in Sanmen County, most of which are raised in the open air and can only be raised once a year. But in Xitou Yang Village, Shaliu Town, Penaeus vannamei not only lives in the greenhouse, but also can raise three crops a year, and the output value has increased significantly. On September 20, the reporter specially felt the wonderful place of raising Penaeus vannamei in an umbrella greenhouse.

At noon on the same day, the reporter braved the scorching sun and came to the breeding base of Sanmen Huiwang Aquatic products Co., Ltd. in Xitou Yang Village. The aquaculture ponds were closely next to each other, each covered with a layer of black tape, but no soil, with a cement column in the middle, dozens of steel wires connected to the cement column, in the shape of an umbrella. There are several aerators floating on the surface of the pool, and the water is clear, so you can see the white prawns clearly.

"you came a little early and you can't see the whole view of the greenhouse. We will soon lay a three-layer net on the steel wire, so it will become a greenhouse and the white prawns will no longer have to be beaten by the wind and rain." Dong Lihui, head of the company, told reporters that the company began to build culture ponds in May this year. At present, various facilities are still being improved, but they have been able to cultivate prawns.

Dong Lihui said that the water temperature of Penaeus vannamei is very high, and the growth environment must be more than 18 ℃, so open-air culture usually releases seedlings in May, starts fishing at the end of August, and can only raise one crop a year. However, umbrella greenhouse culture can play the role of thermal insulation breeding and sales at the wrong time, and can raise three crops a year.

The reporter also learned that Penaeus vannamei has higher requirements for water quality. Traditional farming because the water quality can not be controlled, resulting in more diseases and insect pests, the yield is not very high, the yield per mu is between 500jin and 1000 jin, but the umbrella greenhouse can strictly control the water quality.

The reporter noticed that although the water here also comes directly from the sea water, there are pebbles and fine sand outside the intake pool, and the sea water outside the pond must be purified through these two processes and seep into the intake pool. Compared with the water outside the pond, one is clear and the other is yellowing. From entering the pool to the reservoir, through bleach disinfection, jet oxygen and other ways, the bacteria and water quality affecting culture are well controlled.

"due to prolonging the culture time and ensuring the water temperature and water quality, the yield of Penaeus vannamei in umbrella greenhouse has been significantly increased, and the yield per mu can reach more than 3000 jin." Dong Lihui said that because it can be sold at the wrong time, the average price of Penaeus vannamei per jin is about 20 yuan, which is much higher than the current market price of 12 yuan.

Dong Lihui said that he had always been engaged in the wholesale of South American white shrimp, and noticed that there was a large sales volume of shrimp in Jiangsu and Zhejiang provinces, but after November, he was facing a break, and there was a big gap, so he could only ship goods from Guangdong and other places, but as a result, the survival rate of shrimp was low. So he thought about greenhouse culture. Through the inspection of Guangdong and other places, more than 200 mu of aquaculture ponds have been contracted in Salix, and aquaculture experts in Guangdong have been invited to tackle key technical problems. At present, more than 11 million yuan has been invested. Although the investment is very large, because the output value is high, the profit is good, and there is no shortage of sales, it is estimated that the cost will be recovered next year.