| 摘要 |
PURPOSE:To prevent the decaying of the roots of plant by a method in which U-shaped pipes are arranged around young trees on the dike on the coastal side of a water reservoir and air is supplied to the roots of the young trees from the through holes of the pipes. CONSTITUTION:Latticed slope frames 2 are set on the dike 1 in the water's edge of a water reservoir, and U-shaped vinyl pipes 4 whose surfaces are provided with large numbers of small through holes 3 are provided inside the frames 2. A Salicaceae sapling 5 is planted above the pipes 4 and covered with soil to form a nursery 6. The surface of the nursery 6 is further covered with coal cinders 8 to protect the nursery 6 is further covered with coal cinders 8 to protect the nursery 6 from erosion and also to form the slope 7 of the frame 2. Thus, even when the water level of the water reservoir is changed and the nursery 6 is repeatedly sunk under water, the air in the pipes 4 is supplied in the form of bubbles from the through holes 3 to the roots of the young tree 5. When the water level is lowered, water in the pipes 4 is discharged and air is again stored in the pipes 4. Therefore, the decaying of the roots of the sapling 5 can be prevented and the growth of the young tree can be accelerated. |
