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July 15, 2026SustainabilityOpen Access

Straw Application Rate and Duration Affect Soil Aggregate Composition and Soil Organic Carbon: A Meta-Analysis Based on Field Experiments in Mainland China

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Authors

JYJie YangZWZ X WangHCHonglei Cui

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Overview

Meta-analysis reveals straw application impacts soil organic carbon and aggregate composition in croplands, suggesting optimal practices for sustainability.

Key Points

  • This study evaluates how straw application rate and duration affect soil aggregate composition and soil organic carbon (SOC) sequestration.
  • Conducted a systematic review using the Web of Science database.
  • Performed a random-effects meta-analysis on 63 field experiments in mainland China.
  • Analyzed 846 treatment–control comparisons related to straw incorporation.
  • Straw incorporation increased Mean Weight Diameter (MWD) by 22%, macroaggregate content by 17%, and SOC by 25%.
  • Aggregate-associated carbon in macroaggregates improved by 35%, in microaggregates by 30%, and in silt–clay fractions by 22%.
  • Short-term incorporation (5–8 t ha−1 for <5 years) and long-term incorporation (10–15 t ha−1 for ≥5 years) were optimal for macroaggregate formation.

Cite This Study

Yang et al. (2026) studied this question.

synapsesocial.com/papers/6a57234488b21df87547ffa5https://doi.org/10.3390/su18147138
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