湖山池のアオコ増殖における銅イオンとキレート物質の関係について

抄録

A limiting substance on algal growth in Lake Koyamaike and influent rivers was studied. A chelating substance was found to be a limiting substance except during the summer period. The effect of the chelating substance on inhibition of algal growth by copper ions was examined. Detergents and domestic discharge were examined as the source of the chelating substance. The water bloom growth in Lake Koyamaike was shown to have a close relationship with treatment percentage in the discharge area. Both the treatment of domestic waste water and the usage percentage of paddy fields, which were demonstrated to be another source of chelating substance in the form of fertilizer outlet, affected water bloom growth.