アマモ種子の鉄コーティングによる着底・生長促進技術の開発

抄録

Because specific gravity would increase if the surface of a seed is coated with iron powder, the stability of waveinduced current increased. The improvement mechanism of stability was brought about by 13% of partial subsidence of the minor axis generated into the seed. The iron-coated seed subsided in the valley part of sand ripple generated in a bottom surface, and was buried with disappearance of the ripple. Therefore, the burial depth of the seed can be presumed from the wave height of sand ripple.
The germination rate increased the eelgrass seeds by iron-coating. Furthermore, the time which a bud emergence takes was shortened by about one month, and also increased the bud emergence rate by about 3 times. The reason is because a sprout of eelgrass seeds is promoted by an anaerobic condition. From this research, the appropriate coastal region for direct sowing of iron-coated eelgrass seeds, sowing period, and sowing density can be presumed.