EFFECTS OF DIFFERENT ORGANIC FERTILIZER APPLICATIONS IN SOILLESS LETTUCE CULTIVATION
ACTA SCIENTIARUM POLONORUM-HORTORUM CULTUS, cilt.25, sa.4, ss.17-23, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 25 Sayı: 4
- Basım Tarihi: 2026
- Doi Numarası: 10.24326/asphc.2026.5677
- Dergi Adı: ACTA SCIENTIARUM POLONORUM-HORTORUM CULTUS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, CAB Abstracts, Directory of Open Access Journals
- Sayfa Sayıları: ss.17-23
- Ondokuz Mayıs Üniversitesi Adresli: Evet
Özet
The present study was conducted for the purpose of investigating the potential of different organic fertilizers as alternatives to chemical fertilizers. Three organic fertilizers (protein hydrolysate - PH, black soldier fly manure - BSF and wood ash - WA) were compared with a chemical fertilizer (15-15-15+ME) as a control. The fertilizers were applied at a rate of 1.5 dS m-1 once a week, at a rate of 1 L plant-1. The results show that the highest values for plant height (23.9 cm), leaf number (24.7), crown diameter (35.2 cm), photosynthesis rate (83.2 & micro;mol m-2s-1), plant dry weight (16.2 g) and yield (324.8 g plant-1) were observed in lettuce plants treated with PH organic fertilizer. The highest leaf chlorophyll content (8.6 CCI) and stomatal conductance (408.7 mmol m-2s-1) were recorded in the control, while BSF manure significantly increased root length (36.8 cm) and root dry weight (6.2 g). The potential of organic fertilizers as a viable alternative to chemical fertilizers in the soilless lettuce cultivation has been demonstrated. The utilization of protein hydrolysate has emerged as a pivotal aspect in lettuce cultivation. The nitrogen content of organic fertilizers has been identified as a plant nutrient element affecting success in lettuce cultivation.