University of Tabriz Water and Soil Science 2008-5133 21 1 2014 04 30 Effects of Bacillus coagulans and Different Sources of Phosphate Rocks on Canola (Brassica napus L.) Effects of Bacillus coagulans and Different Sources of Phosphate Rocks on Canola (Brassica napus L.) 127 136 1250 FA M Hayati A Gholizadeh AR Fallah M Rezvani Journal Article 2014 04 30 Existence of large sources of phosphate rocks (PR) in the world along with some disadvantatges of using industrial phosphate ferlilizers have attracted the reasearcher's attention to direct use of PR as P-fertilizer. Phosphate solubilizing bacteria through special mechanism are able to dissolve PR, release phosphorous and make it arailable to plant roots. A factorial experiment based on completely randomized design with two factors a) in the absence and presence of <em>Bacillus coagulons</em> and b) without PR and with PR form various sources, including Yasouj, Yazd, Gasfa and triple superphosphate was conducted in greenhouse using canola cultivar (Hayvla 401). At harvest time after 12 weeks, stem height, stem diameter, leaf area, shoot dry weight and P uptake were measured. The results showed that treatments Included bacterium became superior in all characteristics to the treatments without bacterium. The interaction effects of bacterium and different sources of phosphate on the plant height, uptake of P and the relative effectiveness based on crop P uptake was significant (P<0.05). The maximum height and uptake of P occurred in triple superphosphate fertilizer with bacterium was 54.4 cm and 1.38 g/pot, respectively. Among  phosphates  rocks, canolas with PR from Gafsa source plus bacterium had the greatest height of 39.8 cm and P uptake 0.588 g/pot. The relative effectiveness of the experimental treatment with the bacterium  were 42.2, 39.7 and 24.9 percent, respectively, in Gasfa, Yazd, Yasouj sources.   Existence of large sources of phosphate rocks (PR) in the world along with some disadvantatges of using industrial phosphate ferlilizers have attracted the reasearcher's attention to direct use of PR as P-fertilizer. Phosphate solubilizing bacteria through special mechanism are able to dissolve PR, release phosphorous and make it arailable to plant roots. A factorial experiment based on completely randomized design with two factors a) in the absence and presence of <em>Bacillus coagulons</em> and b) without PR and with PR form various sources, including Yasouj, Yazd, Gasfa and triple superphosphate was conducted in greenhouse using canola cultivar (Hayvla 401). At harvest time after 12 weeks, stem height, stem diameter, leaf area, shoot dry weight and P uptake were measured. The results showed that treatments Included bacterium became superior in all characteristics to the treatments without bacterium. The interaction effects of bacterium and different sources of phosphate on the plant height, uptake of P and the relative effectiveness based on crop P uptake was significant (P<0.05). The maximum height and uptake of P occurred in triple superphosphate fertilizer with bacterium was 54.4 cm and 1.38 g/pot, respectively. Among  phosphates  rocks, canolas with PR from Gafsa source plus bacterium had the greatest height of 39.8 cm and P uptake 0.588 g/pot. The relative effectiveness of the experimental treatment with the bacterium  were 42.2, 39.7 and 24.9 percent, respectively, in Gasfa, Yazd, Yasouj sources.   https://water-soil.tabrizu.ac.ir/article_1250_9ba0c46f3cf7a51c58a18591137f2105.pdf