A two-year field study was conducted to compare the effect of biochar and vermicompost of olive tree pruning waste together with chemical fertilizer on microbial population and soil chemical status and faba bean yield in a calcareous soil in Tarem city, Iran. The treatments included wood biochar (BIC) at two levels of 5 and 10 t ha-1 (BIC5 and BIC10), wood vermicompost (VCM) at two levels of 5 and 10 t ha-1 (VCM5 and VCM10), 50 and 100% recommended chemical fertilizer (NPK50 and NPK100) along with a control. The results showed that the highest population of bacteria was obtained from BIC10 (297.8 × 106 CFU/g dry soil), actinomycetes from VCM10 (99.5 × 105 CFU/g dry soil), and fungi from NPK50 (104.5 × 103 CFU/g dry soil). In both years, vermicompost treatments reduced soil pH by 1.6-9.2% compared to control, but biochars showed the highest pH and EC. Organic treatments, especially VCM10 and BIC10, increased the soil OC compared to the control (12.9-35.4%) and NPK (57.2-79.1%). Ammonium (N-NH4+ ) and nitrate (N-NO3-) nitrogen of soil decreased in line with increasing the use of biochar (BIC10) and vermicompost (VCM10), but increasing NPK, from NPK50 to NPK100, increased soil N-NH4+ and N-NO3─ by 21.3% and 10.7%, respectively. In both years, the highest number of pods (45.9 and 57.8 in the first and second year, respectively), number of seeds (187.3 and 240.2 in the first and second year, respectively) and seed yield (1.997 and 2.502 t ha-1 in first and second year, respectively) were obtained from soils treated with VCM10. In addition, the highest amount of N seeds (5.579%), K (0.839%) and Fe (66.3 mg kg-1) was observed in BIC10 and the highest amount of P seeds (0.519%) was observed in VCM10. Totally, organic amendments were superior to chemical fertilizers in terms of improving soil fertility and seed yield.
| Primary Language | English |
|---|---|
| Subjects | Agronomy |
| Journal Section | Articles |
| Authors | |
| Publication Date | June 23, 2025 |
| Submission Date | May 7, 2024 |
| Acceptance Date | April 1, 2025 |
| Published in Issue | Year 2025 Volume: 30 Issue: 1 |
Turkish Journal of Field Crops is published by the Society of Field Crops Science and issued twice a year.
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Ege University, Faculty of Agriculture,Department of Field Crops
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