Impact of treated wastewater on biological activity and accompanying processes in organic soils (Field and model experiments)
2006
Brzezinska, M. (Polska Akademia Nauk, Lublin (Poland). Inst. Agrofizyki), E-mail: [email protected]
The results showed that periodic soil irrigation with wastewater significantly affected its biological status, and intensity and a trend changes strongly depended on soil type, soil depth, plant cover and wastewater dose. Under field conditions, the activity of soil dehydrogenases and catalases was inhibited in peatmuck soil under popler and in mineral-muck soil with grass cover, whereas it was stimulated in peat-muck soil planted with willow. The persistance of these changes, as determined in the laboratory three years after the irrigation was stopped, depended significantly on the previous soil-plant combination. The inhibition was observed in soil under poplar, and it was unstable in meadow soil where both dehydrogenases and catalase increased down to 50 cm depth
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