THE ROLE OF PLANT GROWTH PROMOTING RBIZOBACTERIA (PGPR) AND PHOSPHORUS FERTILIZATION IN IMPROVING PHENOLOGY AND PHYSIOLOGY OF BEAN (PHASEOLUS VULGARIS L.)

The field experiment was conducted during 2017 and 2018 at the experimental area of the Faculty of Agriculture, Eskisehir Osmangazi University, Eskisehir, Turkey. It was designed as factorial arrangement in the complete randomized block design with three replications. Three phosphorus doses (0, 30 and 60 kg ha(-1) P2O5) were investigated with different biofertilizers (Control, Bontera (Bacillus amyloliquefociens, Bacillus pumilus, Bacillus subtilis, Bacillus licheniformis, Bacillus megaterium, Trichoderma harzianum, Trichoderma kanigi), Bactoboost (Bacillus subtilis, Bacillus magaterium, Loctococcus spp.), Koklendirici (Bacillus subtilis, Bacillus magaterium, Loctococcus spp.) Lifebac NP (Bacillus subtilis, Bacillus magaterium), NSAH (15% organic matter, 6% organic carbon, 13% humic + fulvic acid), Rhizobia (Rhizobium leguminosorum). Emergence time, flowering time, maturity time, chlorophyll content, nodule number, nodule fresh weight, nodule dry weight, leaf area index, normalized difference vegetation index, and grain yield were investigated during the research. All of the investigated characteristics were higher in the first year than in the second year due to high temperature in the second year. Temperature stress negatively affected phenological and physiological characters during the research. Increasing phosphorus doses raised maturity time, chlorophyll content, leaf area index, NDVI and grain yield. In the research biofertilizer positively affected all of the investigated characters except for nodulation potential.