Use of Azotobacter chroococcum strains - NS Betafixin in sugar beet breeding and production
2003
Mrkovacki, N. | Mezei, S. (Naucni institut za ratarstvo i povrtarstvo, Novi Sad (Serbia and Montenegro))
Our preliminary study 1991-1994 conducted under sterile conditions has been focused on specific relationship between Azotobacter chroococcum and sugar beet plants. The study included two commercial sugar beet hybrids and 12 Azotobacter straiins of the 20 straiins isolated from the thizospheres of the hybrids. In the period of 1996-1999 the influence of three Azotobacre chroococcum strains on the production and technological characteristics of three sugar beet varieties was studied. It was shown that the yield of roots and sugar content and yield were positively affected by the inoculation of sugar beet seedds. When it is taken into consideration that increased doses of nitrogen fertilizer tend to increase sugar beet yield while reducing sugar content and other technological characteristics, it is important to mention that Azotobacter application maintains the root yield and sugar content while improving the technological characteritics. The microbiological fertilizer NS Betafixin is a liquid culture of Azotobacter strains isolated from sugar beet rhizosphere, which are capable of fixing the atmospheric nitrogen. The Federal Board for Approval of Microbiological Preparations (Yugoslavia) has approved the production and commercialization of NS Betafixin.
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