effects of salinity and nitrogen application methods on yield and yield components of wheat (triticum aestivum l.)

to evaluate interaction of salinity stress and nitrogen use methods on yield and yield components, in experiment was conducted in split plot in randomized complete block with 3 replications. treatments included: salinity of irrigation water levels 1.5, 4.4 and 7.9 ds/m as main plots, and nitrogen treatments 1. using n fertilizer at 3 stage in soil, 2. using two third n fertilizer in soil at planting and tillering and heading and one third in form of foliar application of n at tillering, 4. using and one third in form of foliar application at heading, 3. using two third of n fertilizer in soil at planting one third of n fertilizer in soil at planting and two third in form of foliar application at tillering and heading, as sub plots. results this study showed that increased in salt stress significant decreased total yield components such that showed decrease 41/5 kg/h in yield with increase in per unite salinity. also methods of nitrogen application in salinity condition, have significant effects on total yield components. at the tillering, one stage of foliar with soil application of urea could increase spike no. m-2 and kernels of spike compared with other treatments. foliar application of urea at heading stage increased kernels weight.