Effects of different levels of nitrogen and potassium on oil content and protein content in rape seed (Brassica napus L.)

A fild study was conducted at farm of Damavand in 2006 to find out the effects of different levels of nitrogen and potassium on oil and protein percent of canola(Brassica napus). A randomized complete block deisgn experiment was carried out with four replication that consisted of ten levels the results indicated that this levels had significant effection on protein, oil and 1000 seed weight on %5 level. But on the grain yield had no significant effectt. Increasing the nitrogen and potassium levels protein percent increased, but increased between N250K150 and N250K100 levels was higher all different fertilizer levels. Intraction of nitrogen and potassium fertilizer changed on oil percent so with almost increase of N on N150K100 levels in maximum. Meanwhile different fertilizer levels on grain yield and 1000 seedweight on the N200K150 was maximum.