Effects of reclaimed wastewater irrigation and fertigation level on olive oil composition and quality
Effects of reclaimed wastewater irrigation and fertigation level on olive oil composition and quality
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DOI：
10.1002/jsfa.9911
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发表时间：
2019-08-08
影响因子：
4.1
通讯作者：
Kerem, Zohar
中科院分区：
文献类型：
--
作者：
Basheer, Loai;Dag, Arnon;Kerem, Zohar
背景：灌溉橄榄可以增加水果和油料的产量。由于淡水的稀缺，包括再生废水(RWW)在内的劣质水被用于果园。研究了不同灌溉方式和不同施肥方式对橄榄油成分和品质的影响。结果长期RWW灌溉对‘Barnea’和‘Leccino’橄榄的油组成和品质指标，包括游离脂肪酸(FFAs)、过氧化值(PV)、总酚含量(TPC)、脂肪酸组成和感官特性均无显著影响。在试验期的大部分时间里，两个品种的平均游离脂肪酸含量都低于0.8%，但在2009年和2012-2013年的季节，两个品种的游离脂肪酸含量都提高到了1.4%。Barnea和Leccino的PV值分别小于9和5 mmolO-2 kg(-1)油。在试验的最后一季，与推荐施肥处理[淡水灌溉(Fr)和标准施肥量灌溉(Re+)]相比，减少施肥(Re-)的RWW灌溉获得的TPC较高，Barnea和Leccino的TPC增量分别超过70%和25%。这些治疗对脂肪酸谱的影响很小，反映在C18：2和C18：3脂肪酸水平的轻微变化上。结论在保证橄榄油品质的前提下，合理利用水分，并结合水分中的营养成分进行适当的施肥，可保证橄榄树的最佳产量。(三)2019年化学工业学会
BACKGROUND Irrigation of olives increases fruit and oil yields. Due to scarcity of freshwater, low-quality water including recycled wastewater (RWW) is utilized in orchards. Here, effects of irrigation with RWW and of fertilization on the composition and quality of olive oil were studied. RESULTS Long-term RWW irrigation of 'Barnea' and 'Leccino' olive had no significant negative effects on either oil composition or quality parameters, including free fatty acids (FFAs), peroxide value (PV), total phenolics content (TPC), fatty acid profiles and organoleptic characteristics. The average FFA contents for both cultivars were less than 0.8% during most of the experimental period, except the seasons 2009 and 2012-2013 for Barnea where the values were raised up to 1.4%. The measured PV levels were less than 9 and 5 mmol O-2 kg(-1) oil for Barnea and Leccino, respectively. In the last season of the experiment for each cultivar, higher TPC were observed in oils obtained from RWW irrigation with reduced fertilization (Re-) as compared to the treatments with the recommended fertilization [freshwater irrigation (Fr) and RWW irrigation (Re+) with standard dose of fertilizers], where the TPC increment exceeded 70% in Barnea and 25% in Leccino. The treatments had only minor effects on the fatty acid profile, reflected in slightly altered levels of C18:2 and C18:3 fatty acids. CONCLUSION The use of RWW, combined with the consideration of nutrients arriving with such water to provide appropriate fertilization, was found suitable for olive irrigation to ensure optimal yields while preserving oil quality. (c) 2019 Society of Chemical Industry