OBJECT: Improved precision fertilization by introducing sensors and remote control to secure fruit yield and reduce nutrient leaching in soil culture. MATERIAL AND METHODS: We broadcasted before bedding and mulching 50 g m–2 of a multi-mineral fertilizer. Beds had two plant rows 20 cm apart, with plant distance of 25 cm. Experimental design was split plot with three replications and three treatments. Treatments: fertigation in large plots, cultivar in small plots and year. RESULTS: Plant development in the establishing year had no benefit of fertigation in addition to fertilizer given before bedding. When the yield is 3 kg m–2 a nutrient solution of 6 g N m–2 gave highest yield, using 4 g m–2 from two weeks before harvest and during harvest. ‘Florence’ and ‘Sonata’ developed well; however, ‘Florence’ had mildew on fruits in the last cropping year. ‘Korona’ presented well the first cropping year, but grew small fruits heavily infested by mildew in the last cropping year. CONCLUSION: Fertilization had effect on fruit yield. It is discussed how a fertilization schedule for the establishment year and cropping years can be adapted to plant development stages. Mildew infestation on fruits was dependent of cultivar and fertilization. Introducing sensors for recording of growth factors and in situ ion-levels of soil water nutrients, proved valuable.

中文翻译：

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在露天多隧道中种植三年的六月草莓的平衡施肥和提高可持续性

目标：通过引入传感器和远程控制来提高精准施肥，以确保果实产量并减少土壤培养中的养分流失。材料和方法：我们在铺垫和覆盖 50 gm-2 的多矿物肥料前撒播。床有两排植物，相距 20 厘米，植物距离为 25 厘米。实验设计为裂区，三个重复和三个处理。处理方法：大地块施肥，小块地栽培品种和一年。结果：植株生长发育除床前施肥外，施肥无任何益处。当产量为 3 kg m-2 时，6 g N m-2 营养液的产量最高，在收获前两周和收获期间使用 4 gm-2。《佛罗伦萨》和《奏鸣曲》发展良好；然而，'Florence' 在最后一年的果实上发生了霉变。'Korona' 在第一个作物年表现良好，但在最后一个作物年长出受到霉菌严重侵染的小果实。结论：施肥对果实产量有影响。讨论了如何根据植物发育阶段调整定植年和种植年的施肥计划。水果上的霉菌侵染取决于品种和施肥。引入用于记录生长因子和土壤水养分的原位离子水平的传感器被证明是有价值的。水果上的霉菌侵染取决于品种和施肥。引入用于记录生长因子和土壤水分养分原位离子水平的传感器被证明是有价值的。水果上的霉菌侵染取决于品种和施肥。引入用于记录生长因子和土壤水分养分原位离子水平的传感器被证明是有价值的。