农业资源与环境学报2026，Vol.43Issue(2)：299-308,10.DOI:10.13254/j.jare.2025.0132
人类活动净氮输入的空间格局及其影响因素
Spatial pattern of net anthropogenic nitrogen input and its influencing factors
摘要
Abstract
Excessive nitrogen input into aquatic systems can lead to eutrophication,drinking water contamination,and biodiversity loss.A comprehensive understanding of the spatial patterns of regional nitrogen input and its driving factors is crucial for effective water resource management.However,current assessments of the spatial distribution and influencing factors of net anthropogenic nitrogen input(NANI)remain limited,hindering the rational planning of socio-economic activities and the mitigation of regional water environmental pressures.This study,based on statistical data from 359 administrative regions across China in 2020,clarified the spatial distribution of NANI and explored its influencing factors using grey relational analysis,multiple regression models,and principal component analysis.The findings revealed both the sources and drivers of anthropogenic nitrogen input across regions and offered a scientific basis for sustainable nitrogen management.In 2020,China's total NANI was 81.16 Tg,with an average input intensity of 9 825 kg·km-2.Nitrogen fertilizer application was the largest contributor,accounting for 56.0％of the total input.Higher NANI values were observed in central and eastern coastal regions,while lower values were found in parts of the northwest and some coastal areas of southern China as well as in economisally underdeveloped regions.NANI showed the strongest correlation with net nitrogen input from food/feed(R2=0.969,P＜0.01),and was also significantly associated with nitrogen fertilizer use and atmospheric deposition.Socioeconomic structure,natural conditions,and land use patterns were found to be highly related to NANI.The results indicated that agriculture and human activities were major contributors to NANI,with more pronounced impacts in central and eastern China and weaker effects in the northwest and northeast.Therefore,nitrogen management strategies should be region-specific:promoting precision fertilization technologies in the east to improve nitrogen use efficiency,and enhancing ecological restoration efforts in the northwest to reduce nitrogen losses.Strengthening monitoring systems,policy support,and cross-sector collaboration are also essential.Future research should focus on long-term monitoring and the coordinated regulation of organic and inorganic nitrogen to support precision nitrogen management.关键词
人类活动净氮输入量(NANI)/空间分布格局/灰色关联分析/氮源结构/生态环境影响Key words
net anthropogenic nitrogen input(NANI)/spatial distribution pattern/grey correlation analysis/nitrogen source structure/ecological environment impact引用本文复制引用
阎雪蕊,卫孟玉,邢欣,李渊,毕永红..人类活动净氮输入的空间格局及其影响因素[J].农业资源与环境学报,2026,43(2):299-308,10.基金项目
国家自然科学基金青年项目(42207528,22206146) （42207528,22206146）
太原科技大学研究生教育创新项目(SY2023026) （SY2023026）
