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Effect of Several Fertilizer Treatments on the Production of American Beachgrass Culms¹

Coastal dune stabilization is greatly influenced by the type of vegetative cover. The most effective plant species for initial dune stabilization along the Atlantic coast is American beachgrass (Ammophila breviligulata Fern.) being very responsive to fertilization as measured by culm numbers produced.

Each of 17 different fertilizer treatments significantly increased culm production. Potassium increased production in the 1st year only. Annual fertilization with soluble nitrogen fertilizer alone was effective. Magnesium ammonium phosphate as Mag Amp, applied at planting only, rapidly increased culm numbers for 3 years but decreased thereafter, approaching the effectiveness of annual applications of mixed 10-10-10 mineral fertilizer.

Key Words: Ammophila breviligulata Fern. • stabilization • dunes

² Staff soil conservationist, USDA, SCS, College Park, Md. and plant materials specialist, USDA, SCS, Cape May Court House, N. J. 08210.

Received for publication May 17, 1968.