| 摘要 |
PROBLEM TO BE SOLVED: To establish the subject culture device in hydroponics, and to establish a highly efficient culture of blanched Welsh onions using the above device. SOLUTION: The subject culture of blanched Welsh onions is performed using the other subject device having such a scheme that a system integrally assembled with a shading material setting frame 4 similar in size to a hydroponic bed 1, a shading section 5 with the top surface perforated at positions similar to the perforations of a setting panel 2 and a shading wall 6 surrounding along the frame 4 is movable vertically in parallel with the hydroponic bed 1 at any time. |
