| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a culture substrate of an algae, enabling the algae such as diatom containing natural organic silicic acid and blue-green algae having nitrogen-fixing ability to emerge artificially, inexpensively and efficiently in a mass in a paddy field; and to provide a siliceous fertilizer for rice farming, consisting essentially of the culture substrate, a cultivation regulator for fishery, consisting essentially of the culture substrate and usable for a culture water area for the fishery of oyster or the like, and a fertilizer or soil improver consisting essentially of the culture substrate. <P>SOLUTION: The culture substrate of the algae comprises a microbiologic agent comprising fly ash of an industrial waste and containing a large amount of silicic acid, or a mixture of the fly ash and a potassium compound, and one or more kinds selected from the group consisting of yeasts belonging to the genus Candida and/or the genus Pichia. The siliceous fertilizer for rice farming, the cultivation regulator for fishery, and the fertilizer or soil improver contains the culture substrate as a main ingredient. <P>COPYRIGHT: (C)2007,JPO&INPIT |
