Changes in Soil Macronutrients after a Long-Term Application of Olive Mill Wastewater

作     者：Leila Chaari Nada Elloumi Salma Mseddi Kamel Gargouri Béchir Ben Rouina Taher Mechichi Monem Kallel 

作者机构：University of SfaxLaboratory of WaterEnergy and EnvironmentNational School of Engineers of Sfax(ENIS)SfaxTunisia University of SfaxLaboratory of WaterEnergy and EnvironmentHigh Institute of Biotechnology of Sfax(ISBS)SfaxTunisia Laboratory of Improvement of Olive and Fruit Trees ProductivityOlive Tree Institute of SfaxSfaxTunisia Laboratory of Enzyme Engineering and MicrobiologyNational School of Engineers of Sfax(ENIS)SfaxTunisia 

出 版 物：《Journal of Agricultural Chemistry and Environment》 (农业化学和环境（英文）)

年 卷 期：2015年第4卷第1期

页      面：1-13页

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

基　　金：This research was financially supported by Ministry of Higher Education Scientific Research and Information and Communication Technologies 

主　　题：Soil Olive Mill Wastewater SAR ESP Phenolic Compounds 

摘      要：The land spreading of olive mill wastewater (OMW) derived from olive oil production can represent a suitable option to enrich and maintain agriculture soils under south Mediterranean climates. Therefore, OMW spreading field may represent a low cost contribution to crop fertilization and soil amendment. The main objective of this study was to investigate the long-term effects of raw OMW application on soil macronutrients and phenolic compounds dynamics. The results showed that regular application of three doses: 50, 100 and 200 m3·ha-1 of OMW for nine successive years increased the soil electrical conductivity significantly (p ≤ 0.05%) with the increase of OMW rates at the depth 0 - 20 cm. The pH variations were not detected after ten months of the spreading date. Furthermore, soil sodium adsorption ratio (SAR) and exchangeable sodium percentage (ESP) values were substantially affected by OMW salinity. The soil organic matter (SOM) increased from 0.068% observed for the control sample to 0.2%, 0.34% and 0.48%, respectively, with the increase of OMW rate in the top layer (0 - 20 cm). The potassium, phosphorus and nitrogen increased gradually with the OMW application dose. The Ca2+ contents on soil decreased with the spreading of OMW rate, as referred to control. In addition, the phenolic compounds variations were not proportional to doses applied and its levels remained high as compared with the control essentially on top layers (0 - 40 cm). This practice should be beneficial to organic farming and is an alternative solution to direct spreading of raw OMW on soil.