氮利用效率的时间滞后及其对农田可持续管理的影响

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2025-06-11 DOI:10.1016/j.resconrec.2025.108451

Jincheng Li , Jiaxing Fu , Taher Kahil , Dor Fridman , Kaikui Cai , Shasha Xu , Gang Zhao , Man Zhang , Xingxing Duan , Yue Qin , Yong Liu

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引用次数: 0

摘要

提高氮素利用效率对农业可持续发展至关重要。尽管近年来取得了一些进展，但由于氮过剩，中国仍然面临着重大的环境风险。研究了1980 - 2020年中国350个地级市耕地氮素利用的时空动态特征。结果表明，中国经济呈现出持续的“三高一低”模式，即高投入、高产出、高盈余和低氮肥利用率。虽然氮肥利用率从2003年的35%上升到2020年的49%，但转折点出现在2005年前后，与国家减肥政策相吻合。区域差异显著，西北和青藏高原低，东北和四川盆地高。氮输入和氮素利用效率之间的时间滞后突出了过去氮积累的遗留效应。在重点地区，秸秆还田和粪肥循环利用等做法已显示出效益。研究结果强调，需要制定针对特定区域的资源节约型氮肥治理战略，以提高长期可持续性。

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Temporal lag in nitrogen use efficiency and its implications for sustainable cropland management

Improving nitrogen use efficiency (NUE) is crucial for sustainable agriculture. Despite recent advancements, China continues to face significant environmental risks due to nitrogen surplus. This study examines the spatiotemporal dynamics of cropland nitrogen use across 350 prefecture-level cities from 1980 to 2020. Results reveal a persistent “three highs and one low” pattern-high input, high output, high surplus, and low NUE. Although NUE increased from 35 % in 2003 to 49 % in 2020, the turning point occurred around 2005, coinciding with the national fertilizer reduction policy. Significant regional disparities remain, with low NUE in the Northwest and Qinghai-Tibet Plateau and high NUE in the Northeast and Sichuan Basin. A temporal lag between nitrogen input and NUE highlights the legacy effects of past nitrogen accumulation. Practices such as straw return and manure recycling in key regions have demonstrated benefits. Findings underscore the need for region-specific, resource-efficient nitrogen governance strategies to enhance long-term sustainability.

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.