2. The greenhouse adopts this arch structure. According to the mechanical principle, this arch structure has good bearing capacity, especially in the north of China, where there is more rain and snow. The arch structure is convenient for cleaning rain and snow, which can ensure the greenhouse to be used for many years. Each pond can be designed as a two-male structure, so that the span of each arch is only 12 meter, which greatly increases the firmness of the greenhouse.
3. Raising shrimps in greenhouses can increase the density of shrimps. Generally, the density of shrimps released in greenhouses can reach120,000 to150,000 per mu, which is three times that of the original pond culture.