The Effects of Different Irrigation Treatments on Olive Oil Quality and Composition: A Comparative Study between Treated and Olive Mill Wastewater

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• 作者：Samia Ben Brahim ; Boutheina Gargouri ; Fatma Marrakchi ; Mohamed Bouaziz
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2016
• 出版时间：February 17, 2016
• 年：2016
• 卷：64
• 期：6
• 页码：1223-1230
• 全文大小：387K
• ISSN：1520-5118

文摘

In the present paper, two irrigation treatments were applied to olive trees cv. Chemlali: irrigation with treated wastewater (TWW) and with olive mill wastewater (OMW), which was spread at three levels (50, 100, and 200 m³/ha). This work is interested in two topics: (1) the influence of different irrigation treatments on olive oil composition and quality and (2) the comparison between OMW and TWW application using different statistical analyses. The obtained variance analysis (ANOVA) has confirmed that there are no significant differences in oil quality indices and flavonoids between the control and treatments amended by OMW or TWW (p > 0.05). However, the irrigation affected some aspects of olive oil composition such as the reduction in palmitic acid (16.32%) and increase in linoleic acid (19.55%). Furthermore, the total phenols and α-tocopherol contents increased significantly following OMW and TWW treatments. Principal component analysis (PCA) and hierarchical cluster analysis (HCA) defined three irrigation groups: OMW 50 and 100 m³/ha, OMW 200 m³/ha and control, and TWW treatment. The full factorial design revealed that OMW amendment by 100 m³/ha is the best irrigation treatment. Thus, the optimal performances in terms of olive oil quality and composition were shown by olive oil extracted from olives grown under irrigation with 100 m³/ha of OMW.