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<p>Purpose: This study examines the integration of biomass ash derived from the combustion of poultry litter at 700&#xa0;°C into a nutrient-rich biowaste fertilizer. The objective is to recycle waste nutrients back into the soil system, with a particular focus on the pigmentation and bioactive compound profiles of black carrots (BC). Method: BCs were cultivated using compost formulations prepared by blending biomass ash with dairy cow manure at application rates of 0% (T0), 15% (T1), 25% (T2), and 50% (T3). After harvest, yield, color parameters, total phenolic content (TPC), total anthocyanin content (TAC), and antioxidant activity (AA) were evaluated. Results: The root fresh weights increased significantly (10.4%) at T1 but were negatively affected by increasing biomass ash in compost at T2 and T3. Specifically, the cultivation with 15% nutrient-enriched biomass ash compost produced the highest levels of TPC (2153 ± 121.94 mg100 g<sup>− 1</sup>), TAC (138.79 ± 8.00 mg100 g<sup>− 1</sup>), and antioxidant activity (32.23 ± 0.69 µM Trolox g<sup>− 1</sup>), indicating a beneficial effect at this supplementation level. Increasing the compost rate beyond 25% led to a decline in phytochemical content and antioxidant capacity, suggesting that excessive ash incorporation may negatively influence the accumulation of phenolic and anthocyanin compounds of BCs. These compositional changes were supported by both color measurements and image processing outcomes. Image analysis of BC powders clearly differentiated the 15% treatment from the control, mainly due to its darker appearance and higher anthocyanin content. Conclusion: This study suggests that nutrient-enriched biomass ash compost has the potential to improve the coloration, phytochemical profile, and antioxidant capacity of black carrots when applied at an ideal rate, highlighting its value as a sustainable soil amendment.</p>

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Enhancing Coloration and Bioactive Compound Properties of Black Carrot by Nutrient Enriched Biomass Ash Compost

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月19日

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  • Saim Ozdemir,
  • Hasan Ozer,
  • Semanur Yildiz,
  • Yaren Didem Esendemir,
  • Marıam Alradwan,
  • Naime Ozdemir

摘要

Purpose: This study examines the integration of biomass ash derived from the combustion of poultry litter at 700 °C into a nutrient-rich biowaste fertilizer. The objective is to recycle waste nutrients back into the soil system, with a particular focus on the pigmentation and bioactive compound profiles of black carrots (BC). Method: BCs were cultivated using compost formulations prepared by blending biomass ash with dairy cow manure at application rates of 0% (T0), 15% (T1), 25% (T2), and 50% (T3). After harvest, yield, color parameters, total phenolic content (TPC), total anthocyanin content (TAC), and antioxidant activity (AA) were evaluated. Results: The root fresh weights increased significantly (10.4%) at T1 but were negatively affected by increasing biomass ash in compost at T2 and T3. Specifically, the cultivation with 15% nutrient-enriched biomass ash compost produced the highest levels of TPC (2153 ± 121.94 mg100 g− 1), TAC (138.79 ± 8.00 mg100 g− 1), and antioxidant activity (32.23 ± 0.69 µM Trolox g− 1), indicating a beneficial effect at this supplementation level. Increasing the compost rate beyond 25% led to a decline in phytochemical content and antioxidant capacity, suggesting that excessive ash incorporation may negatively influence the accumulation of phenolic and anthocyanin compounds of BCs. These compositional changes were supported by both color measurements and image processing outcomes. Image analysis of BC powders clearly differentiated the 15% treatment from the control, mainly due to its darker appearance and higher anthocyanin content. Conclusion: This study suggests that nutrient-enriched biomass ash compost has the potential to improve the coloration, phytochemical profile, and antioxidant capacity of black carrots when applied at an ideal rate, highlighting its value as a sustainable soil amendment.