| 摘要 |
A method of nursery tree hydroponics which comprises filling a raising seedling pot which is provided with passing parts on the side face and the bottom and capable of undergoing fracture with a medium comprising a mixture of smoked charcoal or rice hull with a water holding material, immersing the pot in a culture solution containing 1,000 to 1,800 ppm of a nitrogen component, 600 to 1,000 ppm of a phosphoric acid component, 1,500 to 3,500 ppm of a potassium component, 300 to 500 ppm of a magnesium component and 900 to 1,400 ppm of a lime component, and thus raising the nursery tree with this culture solution. Thus the growth of the nursery tree is favorably affected and remarkably accelerated even after the transplantation of the nursery tree into soil. Moreover, it is possible to thus establish advantageous effects such that the tree raised by this method has false annual rings and is expected to be useful as a wooden board material with excellent density and color. Thus the method is suitable particularly for the cultivation of nursery trees for forestation. |
