Host: Center for Environmental Information Science
Pages 117-122
The experiments were carried out for estimating relation of water temperature, sunshine, water velocity and floating plants to growth of phytoplankton. Experiments conducted in different seasons depicted the control of phytoplankton growth by water temperature. Concerning the light effects, the growth suppression was not always in proportion to the extent of sunshine restraint. Even gentle water flow restrained growth of phytoplankton, especially being combined with restraint of sunshine. Also duckweeds were useful for decreasing nutrient loads. These results suggest that compound control of the growth factor of phytoplankton is effective for the improvement of water environment in small ponds and reservoirs.
