PJB-2022-503
EFFECTS OF SEWAGE SLUDGES AS A NITROGEN SOURCE ON TURF PERFORMANCE OF PERENNIAL RYEGRASS (LOLIUM PERENNE L.)
Sinem ZERE TASKİN
Abstract
2-year research was conducted to determine the effects of different sewage sludge and nitrogen doses on plant growth and turf quality of perennial ryegrass (Lolium perenne L.) under Mediterranean-type climatic conditions. Four nitrogen sources (NS) [NS1: ammonium nitrate (26%), NS2: Bursa City’s wastewater treatment plant’s waste, NS3: biogas production plant reactor waste, and NS4: food processing and canning factory's sludge waste] were used in the research. Nitrogen applications were carried out at doses of 0 (control) g m-2, 2.0-g m-2, 4.0-g m-2, and 6.0-g m-2. Sewage sludges were analyzed before the start of the experiment. According to the analysis results, sewage sludges contained high plant nutrients and were below the critical level of heavy metal content. The 4.0-g m-2 nitrogen dose of all three sewage sludges used in the study provided acceptable turf color and quality values. NS4 gave the highest color and quality values among the sewage sludges. Despite increased turf color and quality values, sewage sludge produced a low clipping yield. Food processing and canning factories' sewage sludges can be alternatives to a nitrogen source.
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