COMPOUND SUBSTRATES FOR THE PROPAGATION OF PARTS OF PLANTS AND FOR THE CULTIVATION OF YOUNG PLANTS

摘要

1388208 Laminates BAYER AG 5 Dec 1972 [9 Dec 1971] 56043/72 Heading B5N [Also in Division C1] A composite substrate body for use in plant cultivation is produced by bonding with an adhesive compatible with the physiology of plants an upper foam resin panel made of hard or semi-hard open-celled hydrophobic polyurethane to one or more lower panels obtained by bonding particles of foam resin. The upper panel which may have a density of 8-50 kg./m.SP3/SP may contain a pigment to impart thereto a dark colour, and algicides, bactericides or fungicides. The particles used to produce the lower panels may be in the form of flakes shavings or dust having a particle diameter of 1-30 mm. and may be of hydrophilic opencelled polyurethane foam, preferably size reduced foam plastics waste produced in the production of the upper panel. The lower panels may contain capillary active, water absorbing, natural or synthetic absorptive substances, buffers, plant nutrients, trace elements, growth regulating substances, fungicides, bactericides and algicides, examples of which are given. The lower bonded panel may comprise two parts, an upper part which contains nitrate, phosphate, potassium and optionally boron, iron and zinc, which is glued, stitched or tacked to a lower part containing sparingly soluble full component fertilizers comprising anions NO 3 -, H 2 PO 4 - and SO 4 = and cations K +, Ca + + and Mg + +. Growth hormones and plant nutrients may be included in the adhesive used to bond the upper and lower panels together.