Azotobacter efficacy in soil under sunflower
1998
Antic, T.
The objective of this study was to examine effectiveness of several Azotobacter chroococcum strains on three different sunflower hybrids (NS-H-26, NS-H-45, NS-H-111). Ten strains of azotobacter isolated from the rhizosphere soil of sunflower plants, are used to examine effectiveness of azotobacter. The number of some systematic and physiological groups of microorganisms as well as enzymatic activity in soil under sunflower depends on sunflower hybrid, the place and time of taking the samples as well as the year in which the research was carried out. The number of examined microorganisms was mostly influenced by the hybrid NS-H-111. In most cases the increased number of microorganisms and enzymatic activity was noticed in middle of vegetation. A highly significant influence on the number of tested microorganisms, as well as on the activity of enzymes has been perceived in rhizosphere soil. In most cases strains of the azotobacter showed the most effective interaction with the hybrid NS-H-111. Inoculation of the sunflower seed with the azotobacter strains had positive effects on the young plants of sunflower in most cases. The strains of azotobacters increase length, mass and contents of nitrogen in sunflower plants. The influence of inoculation also effected microbiological and enzymatic activity in soil under sunflower.
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