Optimizing nitrogen management cooperates yield stability and environmental nitrogen balance from the perspective of continuous straw incorporation

IF 6.4 1区农林科学 Q1 AGRONOMY

Field Crops Research Pub Date : 2025-09-02 DOI:10.1016/j.fcr.2025.110121

Zhengyu Wang , Xuelian Wang , Anran Long , Xinjie Ji , Dechen Wang , Ying Jiang , Xiangwei Gong , Hua Qi

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引用次数: 0

Abstract

Context

The rational allocation of straw and nitrogen (N) fertilizer resources is a crucial strategy for enhancing grain yield and addressing global food security.

Research question

To determine the yield stability and environmental impacts of long-term straw incorporation and N management.

Methods

An eight-year field experiment was conducted in Northeast China to compare varying N levels (0, 112, 187, 262, and 337 kg ha⁻¹) under rotary-till and plough-till combined straw turnovers (RTS and PTS).

Results

Yield and its stability, dry matter accumulation, N uptake, and apparent N balance (ANB) increased with increasing N levels up to 262 kg ha⁻¹, but the related N use efficiency declined due to N application. The optimal thresholds for N application were 172–254 and 147–200 kg ha⁻¹ under RTS and PTS, respectively, which provided 93.0 %–99.9 % and 92.2 %–97.5 % of the maximum production potential while facilitating soil N sequestration and ANB. Additionally, PTS outperformed RTS in grain yield (3.5 %), sustainable index of yield (8.2 %), dry matter accumulation (6.5 %), N uptake (4.7 %), and N uptake efficiency (1.9 %).

Conclusions

Straw incorporation with an optimal N threshold (172–200 kg N ha⁻¹) is advantageous for achieving long-term stable production and reducing the environmental impact on maize farmland.

Significance

This study highlights the importance of regulating N fertilizer regulation in the context of straw amendment and proposes an optimal threshold for N application.

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从秸秆连作角度看，优化氮素管理兼顾了产量稳定和环境氮平衡

秸秆和氮肥资源的合理配置是提高粮食产量和解决全球粮食安全问题的重要战略。研究问题：确定长期秸秆还田和氮素管理的产量稳定性和环境影响。方法在东北地区进行8年田间试验，比较旋转耕和犁耕联合秸秆周转（RTS和PTS）下不同氮素水平（0、112、187、262和337 kg ha−1）的差异。结果随着施氮量的增加，产量及其稳定性、干物质积累量、氮素吸收量和表观氮素平衡（ANB）均增加，施氮量可达262 kg ha−1，但氮素利用效率随施氮量的增加而下降。RTS和PTS条件下的最佳施氮阈值分别为172 ~ 254和147 ~ 200 kg ha−1，可提供最大生产潜力的93.0% % ~ 99.9% %和92.2 % ~ 97.5 %，同时有利于土壤固氮和ANB。此外，PTS在籽粒产量（3.5 %）、可持续产量指数（8.2 %）、干物质积累（6.5 %）、氮素吸收（4.7 %）和氮素吸收效率（1.9 %）方面优于RTS。结论秸秆配施最佳N阈值（172 ~ 200 kg N ha−1）有利于实现玉米田长期稳定生产，减少对环境的影响。本研究强调了在秸秆还田条件下调控氮肥的重要性，并提出了最佳施氮阈值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Field Crops Research 农林科学-农艺学

CiteScore

9.60

自引率

12.10%

发文量

307

审稿时长

46 days

期刊介绍： Field Crops Research is an international journal publishing scientific articles on: √ experimental and modelling research at field, farm and landscape levels on temperate and tropical crops and cropping systems, with a focus on crop ecology and physiology, agronomy, and plant genetics and breeding.