Scholarlink

Purpose <p>Soil microbial biomass phosphorus (MBP) can be an accessible source of phosphorus (P) for plants through microbial turnover. Understanding how agricultural practices affect MBP content in agroecosystems is essential for selecting effective agricultural practices that leverage this potentially available P pool and reduce the need for external P inputs.</p> Methods <p>We conducted a meta-analysis of 961 MBP observations from 134 published studies on cultivated soils, evaluating the effects of organic and mineral fertilization, tillage, and intercropping on MBP.</p> Results <p>The average MBP in agroecosystems topsoil (0–20&#xa0;cm) was 16.2&#xa0;mg P kg soil. Both mineral and organic fertilization increased MBP similarly (+ 65% and + 61%, respectively), despite mineral fertilizers increasing the available P much more (+ 194%) than organic amendments (+ 86%). Organic amendments increased microbial C and N, but mineral fertilization did not affect microbial C. This could indicate differences in the pathways of microbial use of P as a function of fertilizer or amendment form. Random forest analysis indicated that changes in available P and soil organic carbon were the primary and second predictors of MBP changes, respectively.</p> Conclusion <p>Organic amendment, particularly manure, most likely enhances MBP by stimulating microbial growth. Despite not affecting available P, the supply of labile carbon increases MBP, likely by allowing microorganisms to access less available soil P pools. In the long term, increasing soil organic carbon via organic amendments may serve as an effective strategy to maintain or even enhance available P in agroecosystem soils, while promoting biological P cycling.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Soil Microbial Biomass Phosphorus in Agroecosystems: a Meta-analysis of Key Controlling Factors and Agricultural Practices

  • 期刊论文

  • 发表日期：

    2025年8月19日

查看全文
  • Chao Fei,
  • Isabelle Bertrand,
  • Diego Abalos,
  • Lin Zhang,
  • Chiara Pistocchi

摘要

Purpose

Soil microbial biomass phosphorus (MBP) can be an accessible source of phosphorus (P) for plants through microbial turnover. Understanding how agricultural practices affect MBP content in agroecosystems is essential for selecting effective agricultural practices that leverage this potentially available P pool and reduce the need for external P inputs.

Methods

We conducted a meta-analysis of 961 MBP observations from 134 published studies on cultivated soils, evaluating the effects of organic and mineral fertilization, tillage, and intercropping on MBP.

Results

The average MBP in agroecosystems topsoil (0–20 cm) was 16.2 mg P kg soil. Both mineral and organic fertilization increased MBP similarly (+ 65% and + 61%, respectively), despite mineral fertilizers increasing the available P much more (+ 194%) than organic amendments (+ 86%). Organic amendments increased microbial C and N, but mineral fertilization did not affect microbial C. This could indicate differences in the pathways of microbial use of P as a function of fertilizer or amendment form. Random forest analysis indicated that changes in available P and soil organic carbon were the primary and second predictors of MBP changes, respectively.

Conclusion

Organic amendment, particularly manure, most likely enhances MBP by stimulating microbial growth. Despite not affecting available P, the supply of labile carbon increases MBP, likely by allowing microorganisms to access less available soil P pools. In the long term, increasing soil organic carbon via organic amendments may serve as an effective strategy to maintain or even enhance available P in agroecosystem soils, while promoting biological P cycling.