Contribution of nitrogen to main cereal crops yield and the key drivers in China

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

Resources Conservation and Recycling Pub Date : 2024-11-06 DOI:10.1016/j.resconrec.2024.107995

Xinyue Zhang , Zihan Wang , Yingcheng Wang , Xingshuai Tian , Kai He , Zhong Chen , Hao Ying , Yulong Yin , Zhenling Cui

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Abstract

Despite the recognized contribution of nitrogen (N) fertilizer to cereal production, the spatial variation and driving factors remain uncertain. This study determined yield response to nitrogen (YRN) across diverse ecological regions using 49,160 site-years of on-farm experiments and identified key drivers and their interactions. Nitrogen contributes 119.7 million tonnes (Mt) to China's production of maize, wheat, and rice, equivalent to 17% of national production in 2023. The average YRN was 1.73 Mg ha⁻¹, with considerable variation among subregions and land-uses. The top five influential predictors of YRN were estimated, and the most significant interactive factors were evaluated using mix-effect model. For upland crops, solar radiation (SR) significantly inhibits YRN, but this inhibition is modulated by LT through an interactive effect. For paddy rice, evapotranspiration (ET) and SR interacted synergistically, surpassing their individual effects. These results provide benchmarks for optimizing fertilizer strategies and inform effective nitrogen management to enhance agricultural sustainability.

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中国氮素对主要谷类作物产量的贡献及主要驱动因素

尽管氮肥对谷物产量的贡献已得到公认，但其空间变化和驱动因素仍不确定。本研究利用 49,160 个田间试验年测定了不同生态区域的产量对氮素的响应，并确定了关键驱动因素及其相互作用。氮对中国玉米、小麦和水稻产量的贡献为 1.197 亿吨，相当于 2023 年全国产量的 17%。平均 YRN 为 1.73 兆克/公顷-1，不同次区域和土地利用方式之间存在很大差异。估算了对 YRN 影响最大的五个预测因素，并使用混合效应模型评估了最重要的交互因素。对高地作物而言，太阳辐射（SR）对YRN有明显的抑制作用，但这种抑制作用通过交互效应受到LT的调节。对于水稻来说，蒸散量（ET）和太阳辐射具有协同作用，超过了它们各自的影响。这些结果为优化施肥策略提供了基准，并为有效的氮管理提供了信息，从而提高了农业的可持续性。

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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.