Comparison of Levels and mechanical application methods of phosphorus Fertilizer on Canola

Phosphorous is one of the essential macro nutrient elements for canola ( Brassica napus L.).Canola production has increased recently in Markazi province, but there is a little information about requirment and application methods of phosphorous fertilizer. Mecanical side banding application of phosphorous fertilizer with different levels and depth of placement and also broadcasting method was studied in this experiment. necessary adjustments was conducted on furrow opener of grain driller. This experiment was conducted as randomized compelet block design, consist of 8 treatments as following : 1- %70 of phosphorus fertilizer recommended(PFR) as triple super phosphate and 5 centimeter in depth. 2- broadcasting method 3- %30 of PFR and 5 centimeter in depth. 4- %50 of PFR and 5 centimeter in depth. 5-%70 of PFR and 10 centimeter in depth. 6- control 7- %30 of PFR and 10 centimeter in depth.8- %50 of PFR and 10 centimeter in depth , with three replications at Arak station. Combind analysis of variance showed that the effect of treatments was significant on dry matter weight , grain yield , pod number per plant , phosphorus concentration and uptake in grain and straw at p¡Ü0.01 , but the effect of treatments on height of plant was significant at p¡Ü0.05 . Results of duncan multiple rang test ( DMRT) showed that treatment No. 1 was maximum on dry matter weight and phosphorous uptake parameters with 21070 and 39.3 kgha-1 respectively. The maximum of grain yield(5441 kgha-1) , pod number per plant(126) and fertilizer use efficiency(23.2) was gaind from treatment No.5 . Broadcasting treatment method was only maximum on height plant parameter. Exept of height , maximum of other parameters was resulted in side banding method treatments exactly. Depth of phosphorus fertilizer placement had not significant effect on studied parameters. Side Banding application method of phosphorus fertilizer would be recommende under canola cultivation because of increasing grain yield and fertilizer use efficiency and reduction of applied phosphorus fertilizer up to %30 in okapi variety.