The effect of nitrogen fertilizer and plant distance on the distribution of component of yield in canola (Brassica napus L.)

To determine the best amount of nitrogen fertilizer and plant distance of canola (hyola401) and studying their parts of yield in primary level، an experiment was conducted the from of spilt plot in basic blocks randomly in 3 repelications in which، the consumption of urea fertilizer in 4 levels 100،200،300، 400kg in hectare as a main factor and plant distance in 3 levels: 20، 30، 40، cm as a sub- factor in agricultural year 2005-6 in the field of country rice research institute in Amol. the results obtained from the statistical analysis of qualities showed that the effect of nitrogen fertilizer and plant order distance is possiblysignificantat1% level on seed yield، number of plants (m) and the number of sub- branches. Also reciprocal effects of treatment on seed yield and plant number (m)، is significant، possibly at both 1% and 5% levels. Also the most plant height، silk length، Numbero of grain in silk، number of fructify in the layers of plant the use nitrogen about 400 kg in hectare obtained، also the highest yield of seed with 4410 kg in hectare with conditions of plant distance 30 cm، and the use nitrogen about 400 kg، and the least of this amount with conditions of plant distance 20 cm and the use of nitrogen 100 kg in hectare obtained.