INFLUENCE OF TREATED SEWAGE SLUDGE APPLICATIONS ON CORN AND SECOND CROP WHEAT YIELD AND SOME SOIL PROPERTIES OF SANDY LOAM SOIL


Creative Commons License

DELİBACAK S. , ONGUN A. R.

FRESENIUS ENVIRONMENTAL BULLETIN, cilt.25, ss.43-54, 2016 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 25 Konu: 1
  • Basım Tarihi: 2016
  • Dergi Adı: FRESENIUS ENVIRONMENTAL BULLETIN
  • Sayfa Sayıları: ss.43-54

Özet

In this study, influence of treated sewage sludge (TSS) rates on corn and second crop wheat yield and some soil properties of sandy loam soil (Typic Xerofluvent) were investigated. The field study was conducted in 20 plots in a randomized block design with four replications and five different applications including control, mineral fertilizer, treated sewage sludge 12.5 Mg.ha(-1), 25.0 Mg.ha(-1), 37.5 Mg.ha(-1) as dry matter during 2011-2012 in Menemen-Izmir, Turkey. Corn (Zea mays) and wheat (Triticum vulgare) were sown as the first and second crop respectively. During the experiment, soil samples were taken five times in two years. Increasing TSS applications to this soil resulted in significantly increased total biomass and grain yield of corn according to the control. Available nutrient concentrations in the soil decreased in the last periods. That's why grain yield of second crop wheat did not significantly change with increasing TSS applications. Increasing TSS aplications were significiantly increased total N, available P and K, pH, total salt and organic matter (OM) content of sandy loam soil. However, CaCO3 and cation exchange capacity (CEC) values of soil did not change significantly when compared with the control. Due to decomposition of TSS in the soil, effect of TSS levels on soil properties decreased in the last periods. For this reason, it is recommended that 37.5 Mg.ha(-1) TSS as dry matter can be added once in 2 years for improving plant nutrients and soil properties of sandy loam soil, which are characterized by low OM content in Mediterranean region.