Shrimp culture in winter shed was first established by shrimp farmers in the Pearl River Estuary, and now it has developed to many places such as southern Fujian. In recent years, due to the high price of shrimp in winter and spring, especially around the Spring Festival, many farmers have been attracted to build a winter shed to raise shrimp, which has achieved good economic benefits and promoted the upsurge of shrimp raising in winter shed. However, the low water temperature in winter makes it difficult to cultivate Penaeus vannamei for a long time, especially the frequent water quality problems, which have become the key points for the success of winter greenhouse culture. Farmers need relevant technical measures, which are introduced as follows for reference.

First, feeding feed scientifically is an important measure to maintain good water quality.

In winter, shrimp culture is characterized by weak light, low water temperature, poor growth of feed organisms and less natural feed. The growth of Penaeus vannamei mainly depends on artificial compound feed, and the consumption of shrimp is less than that in normal seasons. Therefore, scientific feeding can not only meet the requirements of rapid growth of Penaeus vannamei, but also not affect the water environment. It is required to choose brand-name shrimp feed with good quality, and it is best to choose granular shrimp feed with good stability in water and full maturity and sinking. According to the weather, water temperature, water quality, shrimp density and the actual consumption of shrimp, the feeding amount should be adjusted in time and strictly controlled, and the principle of "a small number of times, less days and more nights, more feeding when the water temperature is high, less feeding if the other person is not, and even feeding" should be adhered to. Check the situation of residual bait in time and adjust the feeding amount. Generally, the principle is to control 70-80% of prawns to be full, and there is no residual material at the bottom of the pond. This can maintain the water quality of the pond, reduce pollution, ensure the growth of Penaeus vannamei, reduce the feed coefficient and reduce the cost.

If the quality of shrimp artificial compound feed is poor, it is easy to dissolve in water or there are many extracts, which will cause extreme pollution of water quality. The feed with poor quality eaten by prawns has poor digestion and absorption, and there are a lot of feces, which seriously pollutes the bottom and water quality of shrimp ponds, causing the water quality to deteriorate gradually and causing a series of diseases of prawns.

In order to scientifically and accurately grasp the amount of feed to be fed, besides calculating the consumption of prawns, it is necessary to strengthen observation and inspection. Each shrimp pond in the winter shed should be equipped with 3-4 reeling nets to regularly observe the feeding and growth of prawns in detail, and the feed amount can be adjusted according to the comprehensive judgment of whether there is residual bait in the reeling nets, the fullness of shrimp stomach and the amount and length of shrimp manure.