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Greenhouse study on the influence of natural biostimulators and fertilizers on improving bean plants growth and microbial activity in oil-polluted soil

Matei Gabi-Mirela
Matei Gabi-Mirela
, 
Matei Sorin
Matei Sorin
, 
Drăghici Elena Maria
Drăghici Elena Maria
 et 
Stoian Marian
Stoian Marian
   | 27 oct. 2018
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Article Category: Research Article
Publié en ligne: 27 oct. 2018
Pages: 209 - 214
DOI: https://doi.org/10.2478/ebtj-2018-0051
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© 2018 Matei Gabi-Mirela, Matei Sorin, Drăghici Elena Maria, Stoian Marian, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Figure 1

The aspect of bean plantlets in experimental variants.
The aspect of bean plantlets in experimental variants.

Figure 2

Influence of natural stimulators and fertilizers on plant biomass. Values followed by the same letter are not significantly different for p<0.05 (Student test).
Influence of natural stimulators and fertilizers on plant biomass. Values followed by the same letter are not significantly different for p<0.05 (Student test).

Figure 3

Influence of natural stimulators and fertilizers on soil respiration. Values followed by the same letter are not significantly different for p<0.05 (Student test).
Influence of natural stimulators and fertilizers on soil respiration. Values followed by the same letter are not significantly different for p<0.05 (Student test).

Figure 4

Influence of natural stimulators and fertilizers on soil bacteria. Values followed by the same letter are not significantly different for p<0.05 (Student test).
Influence of natural stimulators and fertilizers on soil bacteria. Values followed by the same letter are not significantly different for p<0.05 (Student test).

Figure 5

Influence of natural stimulators and fertilizers on soil fungi. Values followed by the same letter are not significantly different for p<0.05 (Student test).
Influence of natural stimulators and fertilizers on soil fungi. Values followed by the same letter are not significantly different for p<0.05 (Student test).

Figure 6

Paper circular chromatograms of soil from experimental variants.
Paper circular chromatograms of soil from experimental variants.

Main characteristics of natural products utilized in experiment and their origin

No.ProductsCharacteristics/Source
1AMALGEROLNatural product with vegetal oils and hormones that stimulates plant growth, mycorrhizal symbiosis, N2-fixing, microbial activity, vegetal debris decomposition, improves soil structure and fertility
2VERMIPLANTNatural nutrients enriched product (biofertilizer) from earthworms containing microelements (barium, iron, zinc, manganese) and amino acids that stimulate microbial activity and plant growth
3POCONatural product of herbs and plant extracts (utilized for pollution control), stimulating and accelerating the growth and metabolic activity of microorganisms by micro-nutrients and trace elements
4IGUANANatural product of algae with macro and microelements for improving soil conditions and plant growth stimulating
5FORMULEXNatural organic complete, balanced and stabilized product of macro and microelements for optimum plant growth and rooting in horticulture

Taxonomic composition of bacterial and fungal microflora

Experimental variantsBacterial species (Topping)Fungal species/cellulolytic microflora (Czapek/Stapp)
ControlPseudomonas fluorescens, Bacillus polymixa, Bacillus circulans, Bacillus cereus Actinomycetes Series Albus, FuscusFusarium verticillioides, Aspergillus ochraceus, Fusarium avenaceus, Aspergillus flavus, Aspergillus terreus, Fusarium sp White sterile mycelia, Rhizopus stolonifer, Eurotium herbariorum, Fusarium sporotrichioides
AmalgerolPseudomonas fluorescens, Bacillus subtilis, Bacillus polymixa, Bacillus megaterium, Bacillus circulans Actinomycetes Series Albus, RuberCunninghamella elegans, Rhizopus stolnifer, Emericella nidulans, Fusarium sporotrichioides, Fusarium sp., Aspergillus versicolor
VermiplantPseudomonas fluorescens, Bacillus circulans, Pseudomonas sp Actinomycetes Series Griseus, Albus, RuberFusarium sp., Fusarium oxysporum, Fusarium sporotrichioides, Paecilomyces marquandii, Mucor racemosus
PocoPseudomonas fluorescens, Pseudomonas sp., Bacillus circulansCunninghamella elegans, Fusarium oxysporum, Fusarium sp., Aspergillus niger, Rhizopus stolnifer, Myrothecium roridum
IguanaPseudomonas fluorescens, Bacillus subtilis, Bacillus megaterium, Pseudomonas aeruginosa, Bacillus polymixa, Alcaligenes sp., Serratia marcescens, Arthrobacter globiformis, Bacillus sp. Actinomycetes Series Albus, Luteus, RuberCunninghamella elegans, Fusarium culmorum var. roseum, Paecilomyces marquandii, Aspergillus versicolor, Aspergillus flavus, Penicillium sp., Trichocladium sp., Aspergillus terreus
FormulexPseudomonas fluorescens, Bacillus megaterium, Bacillus mesentericus, Bacillus circulans, Pseudomonas aeruginosa Actinomycetes Series Albus, Luteus, Fuscus, RuberCunninghamella elegans, Rhizopus stolnifer, Aspergillus fumigatus, Fusarium sp., Fusarium culmorum, Trichocladium sp., Paecilomyces Aspergillus marquandii, flavus, Penicillium sp
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