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Purpose <p>Soil salinization is a severe abiotic stress that threatens global agriculture and food security. Alfalfa (<i>Medicago sativa</i>) is one of the most important forage crops on global scale, and it shows some salt tolerance levels. While the research on whether changes in rhizosphere soil ecological stoichiometry could help alfalfa salinity resistance is limited.</p> Methods <p>In the present study, a pot experiment was carried out with four alfalfa varieties, including Sardi7 (S7), Salsa (Sal), Gannong No.3 (G3) and Gannong No.5 (G5), with three salt levels (0, 150, 300 mmol·L<sup>− 1</sup>) to test the effect of alfalfa cultivation on soil ecological stoichiometry under saline conditions.</p> Results <p>Our results indicated that salt-tolerant varieties, such as Sardi7 (S7) and Salsa (Sal), not only provided higher biomass than Gannong No.3 (G3) and Gannong No.5 (G5), but also reduced soil salt content and increased the content of soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP). Soil organic carbon to soil total phosphorus (C: P) ratio of salt-tolerant varieties was also higher than salt-tolerant varieties that increased by 94.4%, 83.3%, 84.58%, 74.98% respectively (<i>p</i> &lt; 0.05) in 300 mmol·L<sup>− 1</sup> salt level, which reduced the probability of nutrient loss.</p> Conclusions <p>These findings provide new insights in salinized soil recovery and ecological functional enhancement. Overall, this study recommends that salt-tolerant alfalfa varieties can improve saline soil.</p>

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Changes of Soil Ecological Stoichiometry in Rhizosphere of Alfalfa Under Salt Stress

  • 期刊论文

  • 发表日期：

    2025年7月5日

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  • Luyun Chen,
  • Yuxi Feng,
  • Maryam Noor,
  • Jiamin Wang,
  • Rundong Chai,
  • Jibiao Fan,
  • Zhao Chen,
  • Mei-Fang Chien,
  • Xuebing Yan,
  • Shengnan Sun

摘要

Purpose

Soil salinization is a severe abiotic stress that threatens global agriculture and food security. Alfalfa (Medicago sativa) is one of the most important forage crops on global scale, and it shows some salt tolerance levels. While the research on whether changes in rhizosphere soil ecological stoichiometry could help alfalfa salinity resistance is limited.

Methods

In the present study, a pot experiment was carried out with four alfalfa varieties, including Sardi7 (S7), Salsa (Sal), Gannong No.3 (G3) and Gannong No.5 (G5), with three salt levels (0, 150, 300 mmol·L− 1) to test the effect of alfalfa cultivation on soil ecological stoichiometry under saline conditions.

Results

Our results indicated that salt-tolerant varieties, such as Sardi7 (S7) and Salsa (Sal), not only provided higher biomass than Gannong No.3 (G3) and Gannong No.5 (G5), but also reduced soil salt content and increased the content of soil organic carbon (SOC), total nitrogen (TN) and total phosphorus (TP). Soil organic carbon to soil total phosphorus (C: P) ratio of salt-tolerant varieties was also higher than salt-tolerant varieties that increased by 94.4%, 83.3%, 84.58%, 74.98% respectively (p < 0.05) in 300 mmol·L− 1 salt level, which reduced the probability of nutrient loss.

Conclusions

These findings provide new insights in salinized soil recovery and ecological functional enhancement. Overall, this study recommends that salt-tolerant alfalfa varieties can improve saline soil.