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<p>In this study, an attempt was made to assess the effect of sewage sludge (SS) amendment on leek plants (<i>Allium ampeloprasum</i> L.). The impact of varying rates of SS amendment (0, 10, 20, 30, and 40 g kg<sup>−1</sup> of soil) on soil and leek plants was assessed over an 83-day cultivation period using pot-scale experiments. The results of the present study showed that SS significantly (<i>p</i> &lt; 0.05) increased soil nutrient levels. Out of seven analyzed heavy metals (HM), cadmium (Cd), zinc (Zn), and nickel (Ni), exhibited significant (<i>p</i> &lt; 0.05) accumulation in both soil and leek tissues, with Zn and Ni showing the highest increase. Leek plant growth responded positively to moderate SS application, with a maximum plant height of 29.00 cm and total biomass of 0.46 g DM&#xa0;ind.⁻<sup>1</sup> day⁻<sup>1</sup> observed at 10 g kg<sup>−1</sup> SS, respectively. However, excessive SS (40 g kg<sup>−1</sup>) resulted in inhibited growth and increased HM uptake. The bioaccumulation factor (BAF) and translocation factor (TF) analyses revealed that HM were translocated from soil to plant tissues. Pearson correlation analysis revealed a strong positive correlation between soil and plant HM concentrations, underlining the potential for HM bioavailability in SS-amended soils. This study suggests that moderate SS application can enhance leek growth, but higher SS rates may pose risks of HM accumulation in edible tissues, requiring careful management in agricultural use.</p>

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Cultivation of Leek Plants (Allium ampeloprasum L.) Under Sewage Sludge Amendment: A Lab-Scale Experimental Study

  • 期刊论文

  • 发表日期：

    2025年6月4日

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  • Arwa A. AL-Huqail,
  • Pankaj Kumar,
  • Mohamed T. Ahmed,
  • Ebrahem M. Eid

摘要

In this study, an attempt was made to assess the effect of sewage sludge (SS) amendment on leek plants (Allium ampeloprasum L.). The impact of varying rates of SS amendment (0, 10, 20, 30, and 40 g kg−1 of soil) on soil and leek plants was assessed over an 83-day cultivation period using pot-scale experiments. The results of the present study showed that SS significantly (p < 0.05) increased soil nutrient levels. Out of seven analyzed heavy metals (HM), cadmium (Cd), zinc (Zn), and nickel (Ni), exhibited significant (p < 0.05) accumulation in both soil and leek tissues, with Zn and Ni showing the highest increase. Leek plant growth responded positively to moderate SS application, with a maximum plant height of 29.00 cm and total biomass of 0.46 g DM ind.⁻1 day⁻1 observed at 10 g kg−1 SS, respectively. However, excessive SS (40 g kg−1) resulted in inhibited growth and increased HM uptake. The bioaccumulation factor (BAF) and translocation factor (TF) analyses revealed that HM were translocated from soil to plant tissues. Pearson correlation analysis revealed a strong positive correlation between soil and plant HM concentrations, underlining the potential for HM bioavailability in SS-amended soils. This study suggests that moderate SS application can enhance leek growth, but higher SS rates may pose risks of HM accumulation in edible tissues, requiring careful management in agricultural use.