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2010, vol. 47, iss. 2, pp. 599-606
Effect of Azotobacter chroococcum application type on microorganisms in the rhizosphere and sugar beet yield
aInstitute of Field and Vegetable Crops, Novi Sad
bInstitute of Science Application in Agriculture, Belgrade

emailnastasija.mrkovacki@ifvcns.ns.ac.rs
Project:
Projekat Ministarstva nauke Republike Srbije, br. 20020: Poboljšanje germplazme šećerne repe u cilju povećanja prinosa i smanjenja gubitaka nastalih uticajem biotskih i abiotskih faktora (2008-2011)

Keywords: Azotobacter chroococcum; root yield; sugar beet; sugar content; total microbial number; yield
Abstract
Plant growth promoting rhizobacteria (PGPR) are a group of diverse soil bacteria which stimulate the growth of the host plant. It has been shown that Azotobacter chroococcum may be used as biofertilizer for increasing the yield and improving technological characteristics of sugar beet. The effect of three different ways of inoculation of sugarbeet with Azotobacter chroococcum on the production features of sugar beet and microbiological status of rhizosphere soil has been tested. One variety of sugar beet, Drena, was included in the tests in the region Rimski Šančevi, Novi Sad, during 2008 and 2009. Five strains of Azotobacter chroococcum (1, 5, 8, 10 and 14) were used as microbiological fertilizers. There were three variations of inoculation: (A) incorporation in the soil, (B) before the fi rst cultivation, and (C) applying the liquid culture of strain on the seed before sowing. The highest increase in yield of sugar beet roots 6.25 t ha-1 and yield of white sugar 0.91 t ha-1 was achieved with strain 10 with variant of inoculation of soil before the first cultivation. In both years, a positive effect of Azotobacter chroococcum was observed on the total number of microorganisms in the rhizosphere.
References
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article language: Serbian
document type: Original Scientific Paper
published in SCIndeks: 17/08/2010

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