Evaluation of chemical and organic nitrogen sources on yield and yield component of canola ( Brassica napus L.) cultivars

摘要

Canola is one of the most important oil crops in the world and nitrogen is the vital nutrition element for canola yield and growth therefore a field experiment was carried out a factorial split plot arranged in randomize d complete blocks design with four replications in two planting date(PD) at one year . Main plots consisted of two level of organic manure, (OM1) and (OM2) and five level of chemical fertilizer, (CF1), (CF2), (CF3), (CF4), (CF5) and sub plots consisted of two cultivar(C) (Okapi and Zarfam). Results of composed variance analysis showed that chemical fertilizer had significant effect on seed yield and means comparison showed, highest seed yield was observed from third level of chemical fertilizer with 2492 kg/h and in comparison between organic manure levels application of organic manure had h ighest biological yield with 6673 kg/ha this positive effect was attributed to indicate importance of application of organic manures, in continuance result showed highest oil percent and pod number per plants was observed from third level of chemical fert ilizer with 41.9 percent and 88 number respectively.