COMPETITION, LIGHT QUALITY AND SEEDLING GROWTH OF RUSSIAN WILDRYE GRASS (Psathyrostachys juncea)

摘要

The low seedling vigour of Russian wildrye grass (Psathyrostachys juncea) (RWR)limits its use. Shading from durum wheat (Triticum turgidum) reduced RWR leaf number,tiller number, leaf area and seedling dry weight in a growth room experiment. Treatmentswith similar shading differed in tiller number and dry weight, which suggested that lightquality may have also contributed to these responses. In a second growth room experiment,light intensity (PAR) and red:far-red light ratio (670:730 nm) were altered by colouredplastic filters suspended above seedlings of Russian wildrye, crested wheatgrass(Agropyron desertorum) (CWG) and Dahurian wildrye grass (Elvmus dahuricus] (DWR).Leaf area, tiller number and dry weight of RWR seedlings were reduced by declining