Olive Pomace-Derived Compost: Phytotoxicity Assessment and Relevance for Soil Systems

作者：Qaiser Javed, Mohammed Bouhadi, Igor Palčić, Dominik Anđelini, Danko Cvitan, Nikola Major, Marina Lukić, Smiljana Goreta Ban, Dean Ban, David Heath, Tomaž Rijavec, Aleš Lapanje, M. Černe · 发表于：Soil Systems · 年份：2025 · DOI：10.3390/soilsystems9040107 · 被引用次数：7 · 研究领域：Composting and Vermicomposting Techniques、Growth and nutrition in plants、Banana Cultivation and Research

Olive pomace (OP) contains phytotoxic compounds that can impair plant growth and soil quality. Composting provides an effective method for detoxifying olive pomace (OP) and improving its suitability for agricultural use. Therefore, this study investigated the phytotoxic effects of raw olive pomace filtrate (OPF) on seed germination in radish (Raphanus sativus L.) and barley (Hordeum vulgare L.), as well as the impact of composted olive pomace (COP) on their growth. Seeds were exposed to OPF at concentrations of 0% (control), 1%, 3%, 5%, 10%, 20%, and 100%. Additionally, three composting treatments were evaluated: R1 (control: OP + barley straw), R2 (OP + barley straw + urea), and R3 (OP + barley straw + sheep litter). Results showed that OPF at concentrations of 10%, 20%, and 100% significantly reduced seed germination, with complete inhibition at concentrations > 10%. The COP treatments showed different physicochemical properties, such as R2 exhibiting better nutrient availability (C/N = 19, oil content = 0.04%). R3 had the highest concentrations of K (40,430.2 mg/kg) and P (6022.68 mg/kg). Results also indicated that R1 significantly reduced radish dry biomass production compared to barley, although R2 performed slightly better than R1 and R3. The findings highlight the need for proper compost stabilization to minimize the phytotoxicity and improve the agricultural potential of COP for improving soil health.