| 摘要 |
PROBLEM TO BE SOLVED: To obtain an environment suitable for inoculation of spawn of fungus of mycorrhiza such as Tricholoma matsutake, Rooge, etc., by previously making a mass of rootlets of Pinus densiflor a tree in which a fungus of mycorrhiza lives and into which various germs slightly penetrate. SOLUTION: Soil of layer Ao and layer A around horizontal roots 2 of Pinus densiflora a tree in which a fungus of mycorrhiza lives is dug out and removed. Soil of layer B having a low nutrient or Kanuma soil, etc., instead of the soil is buried to the dug hole to prevent penetration of various germs. On the other hand, a water-permeable film 6 is placed on a terrestrial part on the horizontal roots 2 and a water-permeable light-screening material 5 constituted of an organic substance having a high rooting function on the water-permeable film to sandwich the water-permeable film. Then the light-screening material 5 and the water- permeable film 6 are removed, a fungus of mycorrhiza such as Tricholoma matsutake, Rooge, etc., is inoculated into a mass 1 of rootlets formed under the water-permeable film 6. Since light rays on the terrestrial par are screened, the horizontal roots 2 of Pinus densiflora a tree in which a fungus of mycorrhiza lives start roots toward the upper light screening material 5 due to a physiological reaction to light rays. Generated rootlets are prevented from elongating in the vertical direction by the water-permeable film 6 and congested to form the mass 7 of rootlets under the moisture-permeable film 6. Various germs slightly penetrate to the soil since the circumferential soil is soil of the layer B to raise the efficiency of infection of the fungus of mycorrhiza to be inoculated to Tricholoma matsutake, Rooge, etc.
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