Effect of Plant Populations on Content of Nitrogen, Phosphorous, Potassium and Oil Yield of Different Rapeseed Cultivars

In spring rapeseed cultivation, beside seed productiveness, the biochemical composition of seed oilthat characterizes food and nutrient values is great importance. This experiment was conducted basedon the basis of split plot layout with completely randomized block design with 3 replications. Plantdensities in main plots were 40, 80 and 120 plants per m2, and rapeseed cultivars in sub plots wereSarigol, RGS003 and Hyola401. This research was conducted at research farm, experimental researchstation, Shahrekord city, Iran. Plant density had significant influence on nitrogen and potassiumpercentage of seed, seed yield and oil yield and harvest index. Cultivar had no significant influence onexperimental characteristics. None of the experimental characteristics were significantly affected byplant density and cultivar interaction. The highest nitrogen and phosphorous percentage was related to80 plants per m2, however, the maximum potassium percentage of seed was obtained in 40 plants perm2 which had no significant difference with 80 plants per m2. On the other hand, 80 plants per m2density had the highest seed yield and maximum harvest index was related to this treatment. Thehighest oil yield was related to 40 plants per m2. There were no significant differences in amount ofnitrogen, phosphorous and potassium percentage. Although, RGS 003 and Hyola 401 had obtained themaximum seed yield and oil yield, respectively, but there were no significant differences amongcultivars.

Keywords:

Nitrogen , Phosphorous , Potassium , Plant population , Cultivar , Rapeseed