The effect of some PGPBs on the effect of some PGPBs on post-harvest weight, length and width of hyacinth bulbs planted in different areas post-harvest weight, length and width of hyacinth bulbs planted in different areas

The aim of this study is to determine the effect of PGPB and chemical NPK 20:20:20 fertilizer applications on the weight, length and width of the bulbs of hyacinth (Hyacinthus orientalis cv. “Delft Blue” plant grown in the laboratory and research-application gardens of Siirt University Faculty of Agriculture. When half and full doses of commercial fertilizer NPK are used, as PGPB, nitrogen-fixing bacteria: Cellulomonas turbata (TV54A), phosphate dissolving bacteria: Bacillus-GC Group (TV119E) and nitrogen fixing-phosphate dissolving bacteria: Kluyvera cryocrescens (TV113C) were used. In addition to the individual use of these bacteria, a dual combination of the bacteria TV54A and TV119E was applied. At the end of the study, the highest values of weights and lengths of hyacinth bulbs grown in laboratory conditions in control (37.09 g and 47.67 mm), ½ (33.79 g and 48.12 mm) and full dose NPK (32.43 and 47.24 mm) applications were obtained while the highest values of the width in the control pots (44.67 mm) were determined and all the average values were found to be statistically significant; When the bacteria were evaluated, all applications were in the same statistical group, but the highest values were obtained from dual combination application on bulb weight, length and width as 23.45 g, 44.03 mm and 36.31 mm (P<0.001), respectively. Weight and length of hyacinth bulbs grown in field conditions at P<0.01 level; widths were statistically significant at P