INFLUENCE OF SOWING TIME AND NITROGEN ON PRODUCTIVITY AND QUALITY OF DURUM WHEAT (TRITICUM DURUM DESF)

摘要

An investigation was conducted to study the effect of planting time and nitrogen application on the yield and quality of durum wheat cultivars. The study revealed significant reduction in grain yield to the extent of 3.2 q/ha with delay in sowing from4 November to 19 November. Each successive increment of nitrogen produced significantly higher grain yield mainly through increase in number of earheads/m2 over its lower level. Increase in straw yield with 180 kg N/ha over 150 kg was also significant.Nitrogen application also resulted in significant improvement in grain appearance score and hectoliter weight. Cultivars differed significantly for grain yield with PDW 233 producing the highest yield. PDW 233 also produced kernels having significantly higher protein content, sedimentation value and beta carotene content than other cultivars whereas 1000-kernel weight was the highest in cultivar PBW 34. Interaction of nitrogen levels and cultivars for grain yield was significant. PBW 34 at 120 N/ha produced the lowest yield (25.0 q/ha) and PDW 233 with 180 kg N/ ha produced significantly highest yield (42.0 q/ha).