This study explores the production of bio-nutrients from bioactive compound-rich spent coffee grounds (SCG) and biochar (BC) through composting after inoculation with a biological agent and its impact on the growth performance of garden cress and spinach. The SCG was composted with six doses of BC (0, 5, 10, 15, 20, and 25%). The compost with 10% BC exhibited the best maturity, humification, and phytotoxicity index values of dissolved organic carbon (DOC), humification index (E4/E6), and germination index (GI). A metagenome analysis showed that compost starter enhanced the bacterial community’s relative abundance, richness, and diversity in SCG and BC treatments. This improvement included increased Patescibacteria, which can break down noxious phenolic compounds found in SCG and BC. The BC enriched the compost with phosphorus and potassium while preserving the nitrogen. In plant growth experiments, the total chlorophyll content in compost-treated garden cress and spinach was 2.47 and 4.88 mg g−1, respectively, which was significantly greater (p ≤ 0.05) than in unfertilized plants and similar to the plants treated with traditional fertilizer. Overall, the results show that the compost of SCG + BC was well-suited for promoting the growth of garden cress and spinach, providing adequate nutrients as a fertilizer for these leafy vegetables.

This study investigated the effects of sodium selenate (Se) application on the yield and quality parameters of strawberry plants under different water deficit conditions. The research was conducted in greenhouses at Bilecik Şeyh Edebali University during the 2023 growing season and employed a split‐plot design with three replications. Irrigation treatments (100% (I ₁₀₀ ) and 50% (I ₅₀ ) of Class A pan evaporation) were assigned to main plots, while sodium selenate doses (0, 2, and 4 ppm as foliar‐applied) subplots. In this study, strawberry plant shape, fresh fruit yield, fruit weight, fruit per plant, total phenolic and flavonoid concentrations, relative water content and mineral content were investigated. The results indicated that Se application mitigated the adverse effects of water stress, enhancing plant morphology and relative water content. Fresh fruit yield ranged from 43.91 to 86.70 g per plant, with the highest yield from I ₁₀₀ ×Se ₄ and the lowest from I ₅₀ ×Se ₄ . The highest total phenolic and flavonoid contents were found as 271.44 mg QE g‐1 and 64.62 mg QE g‐1, respectively, from the I ₁₀₀ ×Se ₂ . Selenium application increased mineral content under both irrigation levels. Overall, Se supplementation under limited irrigation (I ₅₀ ) alleviated water stress‐related negative effects, suggesting its potential for improving strawberry resilience to drought.

The production of strawberry cultivation in wide ecological regions, its aroma, rich mineral content and taste affect the preference of consumers positively. The high amount of aroma of local cultivars enables them to be used as parents in breeding studies. In this study, it was aimed to determine the morphological and pomological characteristics and phytochemical contents of the superior F1 strawberry genotypes selected after hybridization with the local Osmanli strawberry under the ecological conditions of Bilecik province. Morphological and pomological analyzes were made and the best ten genotypes were selected according to the weighted grading method. According to this, the titratable acidity amount of the selected genotypes was determined between 0.28–0.51, the total soluble solid amount was determined between 5–10.5%, and the pH amount was determined between 3.3–3.78. By looking at the average fruit weight, fruit width and fruit length values, genotypes that can compete with commercial cultivars were selected and these were determined as table genotypes. While the total phenolic content of the ten genotypes selected by phytochemical analyzes was found between 2675.56–3983.89 μg GAE/g TA, the total amount of anthocyanin was determined between 156.19–39.12 μg Plg-3-glu/gta. The antioxidant amount was 18.95 μmol TE/ g ta-7.54 μmol TE/ g in the FRAP method.

Bu çalışmada, Osmanlı çileğinin ana ebeveyn, yerel (Karaçilek, Tüylü, Deli) ve standart (Kabarla, Sweet Ann ve Sweet Charlie) çilek çeşitlerinin tozlayıcı olarak kullanıldığı ıslah çalışması sonucu seçilen elli iki adet F1 genotipi ve ana ebeveynleri kullanılmıştır. Elde edilen meyvelerde suda çözünebilir kuru madde miktarı (%), pH, titre edilebilir asitlik (TA) (%), toplam kuru madde miktarı (%), kül tayini, askorbik asit içeriği (mg/100g) ve toplam fenol miktarı (µg GAE/g ta) belirlenmiştir. Araştırma sonuçları incelendiğinde SÇKM değerlerinin %5,80 ile %14,60; pH değerinin 2,69-3,90; titre edilebilir asit miktarının %0,58-1,79 arasında değiştiği belirlenmiştir. Askorbik asit en yüksek DB-119 genotipinde 55,61 mg/100g bulunurken, en yüksek toplam fenolik madde miktarı DC-42 genotipinde 3887,07µg GAE/g ta bulunmuştur. Meyve yapısının genetik faktörlerden etkilendiği ancak çevre koşularının etkileşimi ile meyve yapısında değişiklik olduğu bilinmektedir. Çalışma sonucunda belirlenen kriterler incelendiğinde melez bireylerin ana ebeveynlerine yakın değer aralığında olduğu belirlenmiştir.

The study was carried out at Bilecik Seyh Edebali University Agricultural Application and Research Center during the period of 2020-2021. Its objective was to assess the influence of different planting dates (27 March, 10 April, 27 April, 15 May) on the pomological and phytochemical attributes of diverse strawberry cultivars (Albion, Pineberry, Monterey, and Portola). The goal was to determine the optimal spring planting periods and varieties that are well-suited for the region. The Monterey and Albion varieties achieved the highest average fruit weight during the third period, with weights of 14.76 g and 15.92 g, respectively. The Monterey variety exhibited the greatest pH level at 3.88, whilst the Pineberry had the lowest pH level at 3.67. The concentration of soluble solids ranged from 4.73% to 8.56% among the different varieties, and from 5.82% to 6.15% throughout the different planting periods. The Monterey variety exhibited the highest anthocyanin concentration (117.73 μg Plg-3-glu g-1 dw) among the various strawberry varieties, while the fourth planting period showed the highest content (84.65 μg Plg-3-glu g-1 dw) among the different times. The concentration of soluble solids ranged from 4.73% to 8.56% among the different varieties, and from 5.82% to 6.15% throughout the different planting periods. The Monterey variety exhibited the highest anthocyanin concentration (117.73 μg Plg-3-glu g-1 dw) among the various strawberry varieties, while the fourth planting period showed the highest content (84.65 μg Plg-3-glu g-1 dw) among the different periods.