Nutrient and productivity relations of the dune grasses Ammophila arenaria and Elymus mollis

摘要: A comparative study of blade photosynthesis and nitrogen use efficiency was made on the dune grasses Ammophila arenaria Elymus mollis. In laboratory, an open system gas analysis apparatus used to examine exchange characteristics blades as influenced by supply. Plants were grown under near-ambient coastal conditions in a greenhouse near Bodega Bay, California, given either high or low supplies otherwise complete nutrient solution. field, 14CO2 uptake techniques employed measure seasonal patterns plants growing situ at Point Reyes National Seashore. Blades lab field studies analyzed for total content, thus allowing calculations photosynthetic (CO2 fixed/unit N.).