Positive effects of amendments on crop yield and organic carbon in sandy soils are regulated by aridity: A global meta-analysis

作者：Tianhong Liu, Lei Wu, Shuirong Tang, Muhammad Shaaban, Lei Meng, Minggang Xu, Wenju Zhang · 发表于：Geoderma · 年份：2025 · DOI：10.1016/j.geoderma.2025.117540 · 被引用次数：6 · 研究领域：Soil Carbon and Nitrogen Dynamics、Crop Yield and Soil Fertility、Aeolian processes and effects

Organic and inorganic amendment application is regarded as an effective management strategy for improving sandy soil health, thus enhancing agricultural productivity and ensuring food security. However, the comprehensive assessment of changes in crop yield and its association with soil organic carbon (SOC) induced by amendments into sandy soil has been poorly quantified. Herein, a global meta -analysis based on 843 observations from 151 field-based studies was conducted to evaluate the patterns and key controlling factors of crop yield and its linkage with SOC in response to organic and inorganic amendments into sandy soil. Results showed that amendment application strongly increased crop yield by 39 % and SOC by 62 % on average in sandy soils, with the greatest yield increase by composite amendments (+92 %), followed by inorganic amendments (+62 %) and organic amendments (+36 %). The inorganic amendment led to the highest increase in SOC (+133 %), followed by composite (+59 %) and organic amendments (+48 %). The linkage between the responses of crop yield and SOC was climate–dependent, with a strongly positive correlation in humid regions (aridity index < 0.5), while no significant relationship was observed in arid regions. The crop yield response positively correlated with mean annual temperature, amendment amount, and initial contents of soil sand and SOC, but decreased with aridity index, amendment duration and soil pH. Random forest analysis revealed that climate (aridit...