The effect of no irrigation from steme elongation stage on agronomical characteristics grain and oil yield of winter rapeseed cultivars

To study the effect of no irrigation from stem‏ elongation stage on agronomical characteristics grain and oil yield of winter rapeseed cultivars, a research was done in case of factorial experiment in form of random complete block basis design in three replications in which the irrigation in two levels consist of normal irrigation (witness) and no irrigation from stem‏ elongation stage and cultivar in five levels‏‏ consist of Okapi, Zarfam, Orient, Talaye, SLM046 cultivars. This experiment was conducted on crop year 1385-86 in the 400 hectar of field of research, breeding and producing of seed and plant institute of karaj. The results showed that the effect of simple of irrigation on characters number of silique in plant, length of silique, seed yield and yield of grain oil in one percentage level and on characters number of grain in silique and weight of 1000 grain in five percentage level were significant. The effect of simple of cultivar also on characters number of silique in plant, length of silique, seed yield and yield of grain oil in one percentage level and for weight of 1000 grain character in five percentage level were significant. Also The effect of interaction of irrigation and cultivar on characters number of silique in plant, seed yield and yield of grain oil in one percentage level were significant. On the basis of the results, that Zarfam cultivar in both normal irrigation condition (witness) and also in drought stress condition had the higher grain and oil yield. According to agronomy‏‏ tube used in drought stress condition has been recormmended.