The Effects of Solid Inocula of Enterobacter cloacae on Nutrients Uptake and Oil Content of Rapeseed

Solid carriers are materials that can protect population of microorganisms in the long time and they dont have toxic effect on bacteria. This experiment was performed to chek the effect of a few combination of solid inoculant of bacteria Enterobacter cloacae S16-3 on growth of rapeseeds (Brassica napus L.) cultivar hayola 308. Solid inoculants of this bacterium were prepared using different carriers including: bagasse, peat, hydrochar, biochar, sawdust, perlite and bagasse:perlit, hydrochar:perlit, biochar:perlit, sawdust:perlit (with ratio 1:1 w/w), then after six months, bacteria population was counted and finally the effect of biofertilizers inoculant was checked with rapeseed inoculation in a pot culture. This experiment was conducted in a completely randomized design (CRD) with three replications in greenhouse by considering 10 treatments of solid carriers, a negative control treatment, a positive control containing 100 and 70 percent of NPK. The results of this study showed that the NPK100 and NPK70 treatments increased the amount of N, P, Fe, Zn and Ca. The results of oil content and fatty acid analysis showed that in all treatments except for peat and biochar, oil content increased. GC results indicated that oil quality was affected by bacterial inoculation treatment and bagasse:perlite treatment increased the percentage of oleic acid. Finally, according to this study the hydrochar, biochar:perlite and bagasse:perlite carriers will be recommended.