Quantitative characteristics of rhizosphere microflora of sugarbeet depending on fertilization
2006
Mrkovacki, N. (Institute of Field and Vegetable Crops, Novi Sad (Serbia)) | Mezei, S. (Institute of Field and Vegetable Crops, Novi Sad (Serbia))
In this study we have determined the abundance of azotobacters, fungi, actinomycetes and the total number of microorganisms in sugarbeet rhizosphere. Simultaneously we studied the effects of application of nitrogen fertilizer, manure and harvest residues. Samples of rhizosphere soil were taken three times in the course of growing season (May, July, September). The experiment included two variants (inoculation with azotobacters and noninoculated variants) in four fertilization levels (nonfertilized control, 50, 100, 150 and 200 kg N/ha), in five replications. Positive effect on azotobacter numbers in both variants (inoculated and noninoculated) was found in the variant without nitrogen and with the low nitrogen doses. Positive effect on the numbers of fungi and actinomycetes was found with the high nitrogen doses.
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