A study of olive mill wastewaters obtained from different treatment processes effects on chemical and microbial properties of a Typic Xerofluvent soil and wheat yield

Turkish Journal of Agriculture & Forestry

article

NUR OKUR¹  HÜSEYİN HÜSNÜ KAYIKÇIOĞLU¹  İHSAN BÜLENT OKUR¹  BÜLENT YAĞMUR¹  DELİA TERESA SPONZA²  RECEP SERDAR KARA³ 

[1]Department of Soil Science and Plant Nutrition, Faculty of Agriculture, Ege University

[2]Department of Environmental Engineering, Faculty of Engineering, Dokuz Eylül University

[3]Department of Water Resources, Faculty of Agrobiology, Czech University of Life Sciences Prague

关键词: Detoxification;    soil conditioning;    soil fertility;    N-mineralization;    phenolics;    soil enzymes;    wheat;    grain yield;   

DOI  :  10.3906/tar-1902-75

来源: Scientific and Technical Research Council of Turkey

【 摘 要 】

This study was carried out to investigate the potential for the usability of treated olive mill wastewater (OMW) as an organic amendment in agricultural soils under Mediterranean climate conditions. OMW was treated by two different treatment processes as economical (E-OMW) and advanced (A-OMW). The treated OMWs and raw OMW (R-OMW) were applied to a loamy soil at a rate of 100 m 3 ha -1 year -1 for 2 years. Soils were sampled 15 days and about 5 months (at harvest) after OMW application for chemical and microbial analyses in each year. The total concentrations of N, P, Cu, Zn, and phenol of R-OMW decreased after both treatment processes while salinity (EC) and the total amounts of K, Na, and Ca increased. The applications of OMW caused changes in soil chemical (pH, EC, P ext , K ext ) and microbial (microbial biomass-C (MB-C), microbial biomass-N (MB-N), basal soil respiration (BSR), N-mineralization (N-min)) characteristics (P < 0.05). In the second year of the experiment, initial samplings showed that the values of soil pH and EC increased significantly under all OMW applications compared to the control. High P ext concentrations were determined in soils amended with R-OMW, while there were high K ext concentrations in soils amended with the treated OMWs. The increases determined in MB-C and MB-N at all sampling times resulted in high MB-C/TOC and MB-N/TN ratios in soils amended with the treated OMWs. The wheat grain yield over the 2-year period showed that the application of the treated OMWs had a positive effect. It was determined that no negative effects occurred for either soil properties or wheat growth with the treated OMW applied at rates of up to 100 m 3 ha -1 . The addition of treated OMW after removal of its phenolic components may be considered as a good option for evaluating this waste in countries where OMW causes serious environmental pollution.

【 授权许可】

Unknown