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Background and aims <p>Enhancing soil phosphorus (P) availability is a global challenge and crucial for sustainable agricultural production. The coupling between water and P has been widely studied, while the response of soil P cycling to temporal variability of soil moisture and the potential biotic and abiotic mechanisms involved are largely unknown, which limits our understanding of strategies to regulate soil P availability and boost crop yield via water management.</p> Methods <p>This study explored the effects of soil moisture temporal variability on P-cycling traits and P availability by integrating biochemical indicators related to soil P, plant P uptake, and crop yield with chemical extraction techniques and metagenomics.</p> Results <p>Reduced soil moisture temporal variability increased soil available P, plant P uptake, and productivity, with increased labile P content accompanied by reduced moderately labile P content. Lower soil moisture variability increased the abundance of P-solubilizing genes (e.g., <i>gcd</i>, <i>ppk</i>, <i>ppx</i>, <i>phoA</i>, <i>phoD</i>, and <i>phy</i>) and enriched beneficial bacterial genera such as <i>Sinorhizobium</i>, <i>Sphingobium</i>, and <i>Arthrobacter</i>. Specifically, stable soil moisture enhanced soil phosphatase activity by regulating microbial P cycling, thereby significantly promoting the conversion of organic P into available forms. Among these, the <i>phoA</i> gene and <i>Sinorhizobium</i> were identified as key predictors of labile inorganic P during organic P mineralization. Concurrently, the increase in soil P availability significantly improved plant productivity and P uptake.</p> Conclusion <p>In conclusion, this study reveals that a soil moisture stabilization strategy effectively enhances soil P availability and crop productivity, offering a pathway toward eco-friendly and sustainable P management.</p>

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Enhancing soil phosphorus availability and microbial phosphorus cycling by stabilizing soil moisture in maize production

  • 期刊论文

  • 发表日期：

    2026年2月19日

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  • Mengze Xu,
  • Huaiyu Long,
  • Dichuan Liu,
  • Yang Hu,
  • Dandan Su,
  • Patrick J. Drohan

摘要

Background and aims

Enhancing soil phosphorus (P) availability is a global challenge and crucial for sustainable agricultural production. The coupling between water and P has been widely studied, while the response of soil P cycling to temporal variability of soil moisture and the potential biotic and abiotic mechanisms involved are largely unknown, which limits our understanding of strategies to regulate soil P availability and boost crop yield via water management.

Methods

This study explored the effects of soil moisture temporal variability on P-cycling traits and P availability by integrating biochemical indicators related to soil P, plant P uptake, and crop yield with chemical extraction techniques and metagenomics.

Results

Reduced soil moisture temporal variability increased soil available P, plant P uptake, and productivity, with increased labile P content accompanied by reduced moderately labile P content. Lower soil moisture variability increased the abundance of P-solubilizing genes (e.g., gcd, ppk, ppx, phoA, phoD, and phy) and enriched beneficial bacterial genera such as Sinorhizobium, Sphingobium, and Arthrobacter. Specifically, stable soil moisture enhanced soil phosphatase activity by regulating microbial P cycling, thereby significantly promoting the conversion of organic P into available forms. Among these, the phoA gene and Sinorhizobium were identified as key predictors of labile inorganic P during organic P mineralization. Concurrently, the increase in soil P availability significantly improved plant productivity and P uptake.

Conclusion

In conclusion, this study reveals that a soil moisture stabilization strategy effectively enhances soil P availability and crop productivity, offering a pathway toward eco-friendly and sustainable P management.