Mobile soilless culture facility capable of effectively maintaining nutrients

The utility model discloses a mobile soilless culture facility capable of effectively maintaining nutrients. The mobile soilless culture facility comprises a nutrition pool and floating seedling culture trays, the floating seedling culture trays are arranged in the nutrition pool, and culture guard rings are arranged in each floating seedling culture tray. The mobile soilless culture facility is particularly suitable for cultivating tobacco plants in greenhouses and sheds with nutrient solution for expanding propagation of aphidius gifuensis. During actual production, the nutrition pool is arranged in one greenhouse, the culture guard rings are placed on each floating seedling culture tray with 200 holes, high-stem tobacco seedlings are transplanted to the middles of the guard rings, then an upper opening of each guard ring is filled with matrix, the guard rings are put in the nutrition pool for cultivation, the whole cultivation process is unaffected by adverse factors of natural conditions, propagation of the aphidius gifuensis is benefited, the number of the tobacco plants grown on the floating seedling culture trays can be determined as required, positions are unlimited, and the culture guard rings filled with the matrix can play roles in maintaining and providing the nutrients and fixing the tobacco plants. The culture guard rings are made of pvc (polyvinyl chloride) tubes by cutting, production is simplified, cost is low, the mobile soilless culture facility is flexible to use and easy to manage, and large-scale propagation of the aphidius gifuensis is guaranteed effectively.