The aim of this study was to assess the potential use of biochar derived from olive pruning to enhance soil properties and tomato and bell pepper plant growth and yield performance in arid environments. Biochar was prepared from olive tree–pruning residues. The biochar was applied to field experiments of tomato and bell pepper plants at five application rates (0, 8, 16, 30, and 40 t ha⁻¹). Relative water content (RWC), leaf chlorophyll, and leaf nutrient (nitrogen (N), phosphorus (P), and potassium (K)) contents were measured. The total yield was determined for each treatment. Fruit nutrient contents were determined in selected fruit samples. Soil samples were collected from each treatment at the middle and end of the experiment for physical and chemical analysis. All experiments were conducted in triplicate. The application of biochar at rates of 8 and 16 t ha⁻¹ enhanced tomato and bell pepper growth; however, application of 30 and 40 t ha⁻¹ adversely affected tomato and bell pepper growth. Nutrient analysis showed that N, P, and K concentrations in leaves and fruits were higher in plants treated with 8 and 16 t ha⁻¹ of biochar than in biochar treatments of 30 and 40 t ha⁻¹. Higher biochar application rates increased soil pH and EC by 1.4% and 12.3% (8 t ha⁻¹) to 7.3% and 107.8% (40 t ha⁻¹), respectively. A biochar application rate of 8 t ha⁻¹ is recommended as an optimal rate to enhance soil fertility for tomato and bell pepper production systems in arid environments.

本研究的目的是评估从橄榄修剪中提取的生物炭在干旱环境中增强土壤特性以及番茄和甜椒植物生长和产量性能的潜在用途。Biochar 是从橄榄树的修剪残渣中制备的。生物炭以五种施用率（0、8、16、30 和 40 t ha ^-1）。测量了相对含水量 (RWC)、叶片叶绿素和叶片养分（氮 (N)、磷 (P) 和钾 (K)）含量。确定每个处理的总产量。在选定的水果样品中测定水果营养成分。于试验中期和末期采集各处理土壤样品进行理化分析。所有实验一式三份进行。以 8 t ha ^-1和 16 t ha ^{-1 的}比例施用生物炭促进了番茄和甜椒的生长；然而，施用 30 和 40 t ha ^-1对番茄和甜椒的生长产生不利影响。养分分析表明，8 t ha ^-1和 16 t ha ^-1处理的植物叶片和果实中的 N、P 和 K 浓度较高。biochar 比 biochar 处理 30 和 40 t ha ^-1。较高的生物炭施用率使土壤 pH 值和 EC 分别增加了 1.4% 和 12.3%（8 t ha ^-1）至 7.3% 和 107.8%（40 t ha ^-1）。建议将 8 t ha ^{-1 的}生物炭施用量作为提高干旱环境中番茄和甜椒生产系统土壤肥力的最佳施用量。