INFLUENCE OF THE BIOSORBENT "UNISORB-BIO" MODIFIED BY WASTE PAPER ON THE SOWING QUALITIES OF PINK CLOVER IN THE CONDITIONS OF OIL POLLUTION
UDC 579.66
Abstract
The article uses the example of artificially polluted soil to consider the effect of urea sorbent-a biological product "Unisorb-Bio" modified by waste paper on the biodegradation of oil with subsequent phyto-control of the soil by a test culture of pink-Swedish clover (Trifolium hybridum).
It is shown that during 18 weeks of exposure "Unisorb-Bio" with immobilized on it the oil-oxidizing strains of Pseudomonas sp. and Bacillus subtilis, the oil content in the soil decreased by 10 times, which is on an order of magnitude higher to comparison with the control. High seeding qualities (germination energy, seed germination – 82%) are observed when using "Unisorb-Bio" modified waste paper from newsprint in conditions of 10% initial soil contamination, with a content of nitrophosca 0.05%.
In the soil with" Unisorb-Bio "modified waste paper from the paper "Snegurochka" the indicators are lower by 17–20% than in the soil samples with biologics product modified by waste paper from newsprint, which is probably perhaps is bound up with more the greater destructibility of the latter under these conditions and an increase of mobile forms of nitrogen and phosphorus in the soil.
The results of phytocontrol (germination energy, seed germination-52%) indicate a relatively good level of soil recovery with 15% initial contamination and almost independent of the type of biological product. The observed seeding quality and morphophysiological indicators give reason to conclude that the "Unisorb-Bio" biological product modified with waste paper is able to restore the soil even with a high level of contamination within one season.
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