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1 Polish Journal of Environmental Studies

1 2009

1 Patkowska E.

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Effect of bio-products on bean yield and bacterial and fungal communities in the rhizosphere and non-rhizosphere

100%

Patkowska E.

Polish Journal of Environmental Studies

2009

tom 18

nr 2

255-263

This study presents the effect of biopreparations (Polyversum, Biochikol 020 PC and Biosept 33 SL) on fungal and bacterial rhizosphere and non-rhizosphere communities after seed dressing and spraying of Phaseolus vulgaris plants. The use of biopreparations has a positive effect on the communities of bacteria and fungi in soil under the cultivation of this plant. The number of cfu of the studied microorganisms in the nonrhizosphere soil was slightly lower than in the rhizosphere. Biochikol 020 PC and Biosept 33 SL increased the number of cfu of bacteria Bacillus spp. and Pseudomonas spp. and decreased the population of soil-borne fungi. Different species were isolated within the fungi and they belonged to the following genera: Altenaria, Fusarium, Rhizoctonia, Sclerotinia, Gliocladium, Penicillium and Trichoderma. The most antagonistic bacteria and fungi were obtained after introducing biopreparations Biochikol 020 PC or Biosept 33 SL. The smallest number of antagonists were found in the soil after dressing the bean seeds with Zaprawa Oxafun T and spraying the plants with fungicide Bravo Plus 500 SC and in the control combination. Besides, the applied biopreparations and fungicides had a positive effect on Pheseolus vulgaris yielding.