of marsh production, phytoplankton production, and organic matter from 

 upland drainage must be calculated to determine the real importance 

 of the marsh to primary consumers in the river. (B.W.) 



Keywords: saltmarsh plants, biomass, productivity, nutrients, Maryland 



ri-B-29 



Sullivan, M.J., and F.C. Daiber. 1974. Response in production of cord 



grass, Spartina alterniflora , to inorganic nitrogen and phosphorus 



fertilizer. Chesapeake Science 15:121-123. 



Fertilization of a low marsh area inhabited by the cord grass 

 Spartina alterniflora with inorganic nitrogen and phosphorus compounds 

 was conducted on a monthly basis during the 1972 growing season. 

 Yield of the cord grass, as measured by an increase in fresh weight 

 after its harvest, was significantly higher in the nitrogen fertilized 

 area when compared to the phosphorus fertilized site and a control 

 area. No effect of phosphorus could be demonstrated. It was concluded 

 that nitrogen supplies are limiting production of dwarf form S. alterniflora 

 in the salt marsh under study and further suggested that introduction 

 of additional sources of inorganic nitrogen into a marsh deficient 

 in nitrogen would tend to increase its productivity. 



Annual Spartina alterniflora above-ground production (g fresh wt/m ) 

 was determined: 



Control Dwarf 1544 



N added 1808 



P added 4208 



(A. A.) 



Keywords: Spartina , cordgrass, mineral nutrients, productivity, Delaware 



II-B-30 



Morgan, M.H. 1961. Annual angiosperm production on a salt marsh. 

 M.S. Thesis. University of Delaware. 34 pp. 



Quantitative measurements were made in selected areas on the Canary 

 Creek Salt Marsh to determine the quantity of angiosperm plant material 

 produced during the 1960 growing season. Production was measured by 

 the clip quadrat method. 



Preliminary analysis demonstrated that 24 half -square-meter samples 

 were adequate for each sampling date. Net production is represented 

 as the sum of the amount of living material present at the end of 



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