اثر سطوح نیتروژن بر رقابت گندم و یولاف وحشی در شرایط شوری

A pot experiment was carried out to investigate the competition of wheat against wild mustard affected by salinity and N fertilizer levels, in Ramin Agriculture and Natural Resources University of Khouzestan. Experimental factors in both trials was nitrogen levels (0, 60, 120 and 180 kg.ha-1) and irrigation water salinity (0, 3, 6 and 9 ds.m-1). The highest dry matter of wheat was obtained in 120 and 180 kg N.ha-1 without salinity. In the rate of 120 kg N.ha-1, there was no significant difference between salinity levels, in term of wheat dry matter. The lowest dry matter of wheat was observed in 9 ds.m-1 without nitrogen. Increase of nitrogen levels in saline conditions, caused to alleviate effect of salinity stress on wheat growth. However, further increase of N levels caused to decrease of competition ability of wheat against wild mustard.