Fecha de publicación: 30/01/2018 Fuente: WIPO "tobacco agriculture" The utility model discloses a durable, avoid remaining tobacco of root system to float educating seedling tray, including disk body, seedling cup, the disk body on be equipped with the circular through -hole of a plurality of, and be equipped with the screw thread in the circular through -hole, the disk body in be hollow structure, and be filled with the helium in the disk body, seedling cup's lower part be the toper, upper portion is cylindrically, and the upper portion outside is equipped with the screw thread, seedling cup's bottom be equipped with the limbers, seedling cup locate the circular through -hole of disk body in, and the screw thread in the circular through -hole of the screw thread in the seedling cup outside and disk body revolves and twists the cooperation, disk body, seedling cup's material be plastics.