Inter-clonal difference in sodium uptake within the speciesphleum pratense andfestuca pratensis

Summary A study was made of intra-species differences in sodium uptake by timothy (Phleum pratense) and meadow fescue (Festuca pratensis), two pasture grasses that are generally known as being low in Na-content compared with perennical ryegrass (Lolium perenne) and cocksfoot (Dactylis glomerata). Na²² was used with NaNO₃ as a tracer in a fertilizer experiment on seedlings grown on trays placed on benches in the greenhouse. With timothy significant clonal differences in Na-uptake varied from one half to the double, but the Na-contents were still appreciably lower than in ryegrass or cocksfoot.