| 摘要 |
PURPOSE:To provide a growth promotor effective for germination and growth of plants, consisting of a highly water-absorptive resin powder in which particles having a particle size within a specified range are contained in a specified proportion or higher. CONSTITUTION:A promotor consists of a highly water-absorptive powder, 70wt% or more of which is particles having a particle size of 8-24 mesh. Examples of said highly water-absorptive resins are a saponified product of a starch-acrylonitrile graft copolymer, a crosslinked polyacryate salt and a crosslinked polyethylene oxide. Among these highly water-absorptive resins, those absorbing water of at least 50 times the weight of the resin are preferred. When the amount of the particles having a particle size of 8-24 mesh is less than 70wt% of the whole amount, that is, when the amount of fine powder is increased, there is a tendency to inhibit germination and growth of plants rather than promoting. Thus, such an amount of the particles having a particle size of 8-24 mesh is not preferred. In blending this plant growth promotor with soil or sand, it is desirable to use the promotor in an appropriate amount of 0.05wt% or more depending on the quality of soil, kinds of plants, rainfall, etc. |
