Fertilisation with ash from wood and with sewage sludge versus contents of macro-and microelements in the soil following cultivation of Helianthus tuberosus L.
¹University of Rzeszow, Department of Bioenergetics, Food Analysis and microbiology, Zelwerowicza 4, PL35-601 Rzeszów, Poland
²West Pomeranian University of Technology in Szczecin, Department of Agroengineering, Papieża Pawła VI 3, PL71-459 Szczecin, Poland
³West Pomeranian University of Technology in Szczecin, Department of Bioengineering, Słowackiego 17, PL71-434 Szczecin, Poland
The present study investigated the effects produced in the soil by municipal sewage sludge and wood ash applied during the cultivation of Jerusalem artichoke. The impact of the presence of applied the fertilizer materials on changes in soil and a macro- and microelements contents were investigated. The comparative analyses took into account 3 factors; the first factor – 4 levels of wood ash – 0; I–4.28; II–8.57; III–12.85 t ha-1, the second factor – 2 levels of sewage sludge – 0; 1 – 30.3 t ha-1, the third factor – 2 varieties of Jerusalem artichoke (Helianthus tuberosus L.) – Gigant, Albik. Application of the fertilisers did not resulted in significant change in the total contents of phosphorus, potassium and magnesium in soil examined after Jerusalem artichoke was harvested. Application of ash from coniferous trees, with high levels of calcium, resulted in increased total contents of calcium in the soil. Fertilisation of the soil with ash from coniferous trees or with sewage sludge, as well as cultivation of two varieties of Jerusalem artichoke, resulted in a significant increase in the concentrations of cadmium and lead, and produced no effects in the levels of nickel, zinc and copper identified in soil. The above findings, and in particular the fact that the limit values were not exceeded, indicate the possibility of using both sludge and biomass ash for fertilizing Jerusalem artichoke.