A 2-year field experiment was conducted on drip-irrigated olive oil orchards (Coratina var.) on a private farm in the newly reclaimed sandy soil of the West Nile Delta region, Egypt, during the 2020 and 2021 seasons to evaluate the effect of five irrigation treatments (120%, 100%, 80% and 60% reference crop evapotranspiration [ETo] and farmer practice) on applied irrigation water (AIW), water consumptive use, olive fruit and oil yields and some fruit quality parameters, water use efficiency, water productivity, electric energy consumed, farm income and benefit–cost ratio and to develop local crop coefficients (K_c) and yield response factors (K_y). The results indicated that the 2-year average AIW values were 9953 (17.9 m³/tree/year), 8484 (15.3 m³/tree/year), 6971 (12.5 m³/tree/year), 5480 (9.9 m³/tree/year) and 17,488 m³/ha (31.5 m³/tree/year) for the tested irrigation treatments. Olive fruit and oil yields and quality parameters were significantly affected by the tested treatments. The highest fruit and oil yields were recorded for the 120% ETo treatment. A seasonal K_c of 0.75 and a seasonal K_y of 0.83 were obtained. It can be concluded that producing oil from olive trees (Coratina var.) in sandy soils can be achieved by applying amounts of water equal to 80% or 60% ETo.

中文翻译：

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沙质土壤中灌溉处理对橄榄油（Coratina 品种）的生产力的影响

2020年和2021年季节，在埃及西尼罗河三角洲地区新开垦的沙质土壤的私人农场的滴灌橄榄油园（Coratina var.）上进行了为期2年的田间试验，以评估滴灌橄榄油果园的效果。五种灌溉处理（120%、100%、80% 和 60% 参考作物蒸散量 [ETo] 和农民实践），涉及灌溉用水 (AIW)、耗水量、橄榄果和油产量以及一些水果质量参数、用水量效率、水生产率、消耗的电能、农场收入和效益成本比，并制定当地作物系数 ( K _c ) 和产量响应因子 ( K _y )。结果表明，2年平均AIW值为9953（17.9 m ³ /树/年）、8484（15.3 m ³ /树/年）、6971（12.5 m ³ /树/年）、5480（9.9 m ^{3 /}树/年）。 /树/年）和 17,488 m ³ /公顷（31.5 m ³ /树/年）用于测试的灌溉处理。橄榄果和油的产量和质量参数受到测试处理的显着影响。 120% ETo 处理的果实和油产量最高。得到的季节性K _c为 0.75，季节性K _y为 0.83。可以得出结论，通过施用相当于 80% 或 60% ETo 的水量，可以从沙质土壤中的橄榄树 (Coratina var.) 中提取油。