Soja i mešane bakterijske populacije

The beneficial effect of soybean inoculation with bradyrhizobia is well known. The aim of this research was to determine the effect of inoculation of soybean seed with mixed population of Bradyrhizobium japonicum. Bacillus megaterium, Bacillus circulons, and Azotobacter chroococcum, on the number of microorganisms and yield of soybean. The experiment was conducted on chernozem at the experimental field of Maize Research Institute, Zemun Polje. Soybean seeds were inoculated before seeding. Bacterial mixture has contained equal amounts of the bacteria in the peat. Humate is added to peat in order to prolong bacteria survive. The control variant was inoculated with Bradyrhizobium japonicum. The study showed that seed inoculation with bacterial mixtures caused an increase in microbial activity in the soil rhizosphere (total bacterial number, number of ammonifiers, azotobacters and dehydrogenase). The highest yield of soybean was obtained by inoculation with B. japonicum, B. megaterium and Bacillus circulons (4.5tlha).Povoljan efekat inokulacije soje kvržičnim bakterijama odavno je poznat. Cilj ovih istraživanja bio je determinisanje efekta inokulacije semena soje mešanim populacijama Bradyrhizobiumjaponicum, Bacillus megaterium, Bacillus circulons i Azotobacter chroococcum na brojnost mikroorganizama i prinos soje. Ogled je postavljen na černozemu na oglednim poljima Instituta za kukuruz Zemun Polje. Seme soje je inokulisano neposredno pre setve. Bakterijske smeše sadržale su podjednake količine bakterija u tresetu. Humat je dodat tresetu radi stimulacije rasta bakterijskih populacija. Kontrolna varijanta bila je inokulisana sa Bradyrhizobium japonicum. Ispitivanja su pokazala da inokulacija semena bakterijskim smešama povećava mikrobiološku aktivnost zemljišne rizosfere (ukupan broj bakterija, amonifikatori azotobakter i dehidrogenaza). Najveći prinos soje dobijen je pri inokulaciji sa B. japonicum, B. megaterium i Bacillus circulons (4.5t/ha)