Growth Response of Halophila engelmanni Aschers. to Sulfide Copper and Organic Nitrogen in Marine Sediments

摘要

Growth response of the seagrass Halophila engelmanni Aschers. was studied using defined culture techniques. When added to the rhizosphere, nutrient-seawater medium supported vigorous plant growth, if substantial Cu (10 times that in modified Hoagland solution) plus organic N were present. H2S up to 0.2 millimolar in the sediment was not inhibitory. A requirement for exogenous organic N, especially urea, is postulated for vigorous growth of Halophila.