Akademik Veri Yönetim Sistemi
FRESENIUS ENVIRONMENTAL BULLETIN, cilt.25, sa.5, ss.1484-1493, 2016 (SCI-Expanded)
Recycling of organic wastes within agriculture may help maintain soil fertility via effects on physical, chemical and biological properties. This study examines the effect of sewage sludge application on soil biochemical properties. Dewatered anaerobically digested sewage sludge were collected from the sewage treatment plants in 9 different regions of Turkey (Izmir, Gaziantep, Samsun, Antalya, Elazig, Karamursel, Ankara, Yozgat, and Duzce) were chosen and surface soils (0-20 cm) were also taken from the agricultural lands of these regions. We studied the effects of adding different doses (0, 2, 4 and 8 t dry matter (DM) da(-1)) of sewage sludge on selected soil characteristics. Soils treated with sludges were incubated under constant laboratory conditions at 25 degrees C for 0, 60 and 120 days. As a result; the addition of different doses of sludge caused a rapid and significant increasing of soil enzymatic activities, soil biomass, soil respiration and q CO2, these increases were especially noticeable in soil treated with high doses of sludge. Sludge application somewhat increased soil enzyme activities. In addition, a significant (P<0.05) variations in soil respiration were also observed in this study. The highest rate of sludge application (8 tha(-1)) was found to significantly (P<0.05) increase the functional diversity of the soil community. These results suggest that although the sludge application resulted increasing in the diversity of the microbial activity, the overall size of the soil microbial biomass, CO2 production and qCO(2) values were either unchanged or increased.