Evaluation of yield and yield components of winter spring rapeseed varieties in cultivation of different plant densities in terms of the use of selenium

To the response of yield and yield components of spring rapeseed varieties in cultivation of winter to plant density in terms of the use of selenium, a factorial experiment split-plot in randomized complete block design with three replications in crop years 2014 and 2015 in the Research Institute of Plant Improvement and Karaj seed was carried out. Plant density in three levels (40, 60 and 80 square meters) and selenium on two levels (non-sprayed (with water) control and foliar application of selenium at a rate of 30 grams per liter of sodium selenate) factorial in main plots and numbers in five levels (Sarigol, Hyola 401, Jacomo, Jerome, Dalgan) were the subplots. The results showed that Tymarsal, density, selenium, variety and density of the year, the Brtrakm significant effect on number of pods per plant, seeds per pod, seed weight and seed yield. Dalgan figure at 40 meters the highest seed weight and seed yield was higher than other varieties. The highest biological yield 16622.225 weight in kg per hectare had 40 square meters. According to the survey results also showed that the highest yield in both years obtained when spraying selenium were tested.