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This study examined the effects of saline-alkali stress on seed germination and seedling physiology of Medicago sativa L., Melilotus officinalis, and foxtail millet to identify salt-tolerant forage species for sustainable saline-alkali land use. Results showed that salt stress significantly inhibited germination and growth in all species, with foxtail millet exhibiting the highest tolerance (56 ~ 57% germination under 0.2 ~ 0.4% salinity versus 19 ~ 21% in the others). Physiological analyses revealed that salt stress increased malondialdehyde (MDA) content while inducing osmoregulatory substances (proline, soluble proteins) and altering antioxidant enzyme activities (SOD, POD, CAT, APX). Foxtail millet’s superior tolerance was linked to efficient osmotic regulation and stable antioxidant activity, making it ideal for saline soil remediation. This study provides insights for improving saline-alkali soils and optimizing agricultural sustainability in regions like the Yellow River irrigation area.

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Effects of Salt Stress on Physiological Characteristics of Medicago Sativa L., Melilotus Officinalis, and Foxtail Millet and Their Applications in Agricultural Sustainability

  • 会议论文

  • 发表日期：

    2026年

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  • Qi Wang,
  • Hu Liu,
  • Hongfang Li,
  • Hui Zhou,
  • Weidong Xi,
  • Lei Gao

摘要

This study examined the effects of saline-alkali stress on seed germination and seedling physiology of Medicago sativa L., Melilotus officinalis, and foxtail millet to identify salt-tolerant forage species for sustainable saline-alkali land use. Results showed that salt stress significantly inhibited germination and growth in all species, with foxtail millet exhibiting the highest tolerance (56 ~ 57% germination under 0.2 ~ 0.4% salinity versus 19 ~ 21% in the others). Physiological analyses revealed that salt stress increased malondialdehyde (MDA) content while inducing osmoregulatory substances (proline, soluble proteins) and altering antioxidant enzyme activities (SOD, POD, CAT, APX). Foxtail millet’s superior tolerance was linked to efficient osmotic regulation and stable antioxidant activity, making it ideal for saline soil remediation. This study provides insights for improving saline-alkali soils and optimizing agricultural sustainability in regions like the Yellow River irrigation area.