This study determined the fertilizer potentials of the dehydrated food waste powder (DFWP) and spent coffee grounds (SCGs) through assessing their effects on yield, antioxidant activities, mineral and proximate compositions of leaf lettuce and Japanese hogfennel their efficiencies to inorganic fertilizers (N-P2O5-K2O, NPK). In this study, both organic amendments were applied at rates that supplied half, double and recommended nitrogen (N) requirements of the leaf lettuce (15 Mg N/ha) and Japanese hogfennel (10 Mg N/ha) established in Daejeon, South Korea. The recommended treatment of DFWP produced the highest lettuce and Japanese hogfennel yields, respectively. Halving the application rates of the organic amendments generally limited the yielding capacities while doubling them invoked negative yield responses in both crops. The highest antioxidant activities, mineral and proximate contents in both crops were obtained with the recommended dosage of amendments. The SCGs outperformed NPK in all the parameters of the Japanese hogfennel assessed in this study even though its impact on the leaf lettuce was adverse. Therefore, both DFWP and SCGs can effectively supply plant nutrients but their application rates should be regulated so as to avoid NaCl toxicity and elevated phytotoxicity in DFWP and SCGs, respectively.

中文翻译：

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脱水食物垃圾和废咖啡渣叶类蔬菜的产量、功能特性和营养成分

本研究通过评估脱水食物垃圾粉（DFWP）和废咖啡渣（SCG）对产量、抗氧化活性、生菜和日本猪茴香的矿物质和近似成分的影响以及其对无机肥料（N- P2O5-K2O、NPK）。在这项研究中，两种有机改良剂的施用量分别满足韩国大田种植的生菜（15 毫克氮/公顷）和日本猪茴香（10 毫克氮/公顷）氮 (N) 需求的一半、两倍和推荐氮 (N) 需求。 。推荐的 DFWP 处理分别产生了最高的生菜和日本猪茴香产量。将有机改良剂的施用量减半通常会限制产量能力，而将有机改良剂的施用量加倍则会引起两种作物的负产量反应。使用推荐剂量的改良剂，两种作物都获得了最高的抗氧化活性、矿物质和粗略含量。在本研究中评估的日本猪茴香的所有参数中，SCG 均优于 NPK，尽管它对生菜有不利影响。因此，DFWP 和 SCG 都可以有效地提供植物养分，但应调节其施用量，以避免 DFWP 和 SCG 中的 NaCl 毒性和植物毒性升高。