文章链接：https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2020EF001514 

　　Nitrogen (N) fertilization has boosted grain production during the past century, while excess N fertilization with declining N use efficiency (NUE) has led to severe pollution in many regions. To achieve the goal of sustainable food production, Technologies and Management Practices (TMPs, e.g., optimum N application rate and methods, N-transformation inhibitors) have been developed to improve crop yield and NUE and to reduce N losses. However, it remains unclear how N fate has been changed by environmental factors and TMPs. Here, we compiled a dataset of 366 field ¹⁵N tracer observations from 74 publications worldwide and conducted a meta-analysis to examine how environmental conditions and management practices influence the fertilizer-N fate one growing season after the fertilization of maize. We show that the proportion of ¹⁵N taken up by aboveground biomass (NUE_15N), was significantly lower in China (33%) than that in North America (42%) and the European Union (54%). Soil organic carbon was the most critical environmental factor positively correlated with NUE_15N. Among the nine selected categories of TMPs, deep placement of fertilizer and split application increased the grain yield and decreased the fertilizer-N loss consistently among studies. Reducing the fertilizer-N rate could increase the NUE_15N but presents risks of yield reduction in some regions. This study demonstrates the importance of SOC and varying impacts of TMPs on the efficiency of fertilizer use in cropping systems globally and provides critical information for farmers and policymakers to improve N management for higher productivity and less pollution.