摘要 : Afforestation is an efficient approach to sequestering large amounts of carbon from terrestrial ecosystems. However, the impact of afforestation on soil N and P dynamics remains largely uncertain because of the complex mechanisms ... 展开 Afforestation is an efficient approach to sequestering large amounts of carbon from terrestrial ecosystems. However, the impact of afforestation on soil N and P dynamics remains largely uncertain because of the complex mechanisms jointly regulated by climate, plants, and soil. Here, we proceed with a meta-analysis of 742 observations from 110 articles to assess the effects of soil N and P dynamics following afforestation. Afforestation significantly increased total nitrogen (TN) and available phosphorus (AP) content but decreased NH4+-N and total phosphorus (TP) content. The weighted response ratios (RR++) of TN, NH4+-N, NO3- -N, TP, and AP showed divergent patterns among the categorical groups (i.e., ecozones, leaf types, leaf phenology, and climate zones). In contrast to afforestation in the upland zones, afforestation significantly decreased TN content but increased NH4+N and NO3- -N in the riparian zones. Mixed-species afforestation with broadleaved and needle-leaved trees significantly decreased soil TN and TP but increased NH4+-N, NO3- -N, and AP contents. Variations in the response of TN were mainly ascribed to soil properties (e.g., pH, bulk density, BD, and soil organic carbon, SOC) and microbial biomass, with relative contributions of 48.91% and 29.11%, respectively. In particular, microbial biomass accounted for the largest proportion (64.56%) of the variation in the response of TP, followed by climate and soil properties, which contributed 77.09% of the total variation in TP response. Among the soil properties, SOC was the primary factor regulating changes in TN and TP, especially TN, following afforestation. Overall, our results reveal the different dynamics between soil N and P following afforestation, which not only reflects the decoupling of soil N and P cycles but also provides novel insights into the underlying mechanisms of soil N and P dynamics in response to future scenarios of land use change. 收起