Indian Journal of Science and Technology

Abstract

A field experiment was carried out at Qazvin-Iran during 2009-2010 to assess the effect of different levels of nitrogen (N0, N75, N150 and N225 kg ha-1 ) and potassium (K0, K45, K90 and K135 kg ha-1 ) on yield and some of the agronomical characteristics in Mustard (Brassica juncea). Experiment was conducted as factorial randomized complete block design with three replications. The results showed that increased amount of nitrogen and Potassium up to 225 kg N ha-1 and 135 kg K ha-1 respectively had a positive and significant (p<0.01) effect on thousand seed weight (TSW), seed yield (SY) and seed oil yield (SOY). The maximum and minimum of the above mentioned traits were observed in the treatment N225, K135 kg ha-1 and N0, K0 kg ha-1 respectively. However, increased levels of nitrogen and potassium had a significant effect on seed oil percentage (SOP) and harvest index (HI) but showed no consistent trend. The highest and lowest values of seed oil percentages were obtained in the treatment of N75, K90 kg ha-1 and N0, K0 kg ha-1 , also the maximum and minimum of harvest index were recorded in the treatments N225, K90 and N75, K0 kg ha-1 . Moreover the results indicate that the interaction effect of nitrogen and Potassium on all of the characters being studied was significant (p<0.01).
Keywords: Agronomical characteristics, Mustard, Nitrogen, Potassium, Yield.