Abstract
The growth response of Pavlova (Monochrysis) lutheri (Droop) Green was assayed in a culture medium enriched with organic extracts aerobically biodigested from cow and chicken manures and from the macroalgae Macrocystis pyrifera (L.) C. Agard. The results indicate that, with a traditional inorganic medium and elutriated, aerobically digested manures, it is possible to attain similar maximum algal densities and equivalent algal growth rates for similar time-periods despite large differences in inorganic nitrogen and phosphorus content. The cause for this is speculated to be the conversion of organic nitrogen and phosphorus in the manure medium to inorganic forms and the presence of growth stimulatory substances in the elutriate.
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