The effect of Azotobacter chroococcum inoculation of sugar beet seeds on the number of bacteria on the root and in the rhizosphere

Mrkovacki, N.; Mezei, S.; Kovacev, L.; Sklenar, P.

The effect of Azotobacter chroococcum inoculation of sugar beet seeds on the number of bacteria on the root and in the rhizosphere

1998

Mrkovacki, N. | Mezei, S. | Kovacev, L. | Sklenar, P. (Institute of Field and Vegetable Crops, Novi Sad (Yugoslavia))

The objective of the study was to investigate the abundance of Azotobacter in the rhizosphere and on the root of four hybrid varieties of sugar beet (Hy-11, Dana, Delta and Norma). The seeds were inoculated with several strains of Azotobacter chroococcum (2, 3, 5, 8, 14, 2/1). The samples were taken on two different dates. On average, all the strains brought about a statistically significant increase in the number of the bacteria in relation to the uninoculated controls. In the rhizosphere, the greatest increase was achieved in Delta inoculated with strains 5 and 2/1. Strains 8 and 2/1 in Dana and strain 14 in Norma produced the highest number of the bacteria on the root.

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