Response of Canola Yield Quantity and Quality to Different Methods of Fertilization in Crop Rotation

In order to study the effect of crop rotation and different systems of soil fertility on grain yield and quality of canola (Talayeh cultivar), an experiment was conducted at experimental farm of Agricultural Research Center of Sanandaj in 2008 - 2010 growing seasons. Experimental designs were arranged in split-split plots based on randomized complete blocks design with three replications. Main plot consisted three crop rotation, (R1): Chickpea, Sunflower, Wheat, Canola; (R2): Green manure, Chickpea, Green manure, Wheat, Green manure, Canola; (R3): Canola, Canola, Canola. Sub plots consisted of five strategies for obtaining the basal fertilizers requirement that included (N1): farm yard manure; (N2): compost; (N3): chemical fertilizers; (N4): farm yard manure + compost and (N5): farm yard manure + compost + chemical fertilizers; and control (N6). Sub-Sub plots consisted four levels of biofertilizers: (B1): Bacillus lentus and Pseudomonas putida; (B2): Trichoderma harzianum; (B3): Bacillus lentus and Pseudomonas putida & Trichoderma harzianum; and (B4): control, (without biofertilizers). Results showed that rotation, basal fertilizers, biofertilizers and interactions of them have significant effects on grain yield. The highest grain yield was obtained from R2N5B3 treatment, that organic and chemical fertilizers were co applied. Crop rotation, basal fertilizers, biofertilizers and interactions of them have a significant effect on leaf chlorophyll. The highest nitrogen content (38.9 mg/g) and least amount of (N/S) were obtained from N5B3 treatment. Crop rotation, basal fertilizers and biofertilizers have a significant effect on oil percent and oil yield.