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Optimizing nitrogen management to reconcile cotton yield and yield stability: A three-year field study

文献类型： 外文期刊

作者： Feng, Weina 1 ; Sun, Miao 1 ; Shao, Jingjing 1 ; Pang, Chaoyou 1 ; Zheng, Cangsong 1 ; Dong, Helin 1 ; Li, Pengcheng 1 ;

作者机构： 1.Chinese Acad Agr Sci, Inst Cotton Res, State Key Lab Cotton Biobreeding & Integrated Util, Anyang 455000, Peoples R China

2.Chinese Acad Agr Sci, Inst Western Agr, Changji 831100, Peoples R China

关键词： Yield variation; N supply; Weather -related factors; Soil nutrient contents

期刊名称：INDUSTRIAL CROPS AND PRODUCTS （ 影响因子：5.6； 五年影响因子：5.7 ）

ISSN： 0926-6690

年卷期： 2024 年 218 卷

页码：

收录情况： SCI

摘要： Simultaneously increasing yield and yield stability are of critical importance to achieving sustainable cotton (Gossypium hirsutum L.) production. Yield stability (invariability in time) varies with weather, site-specific soil conditions and agronomic managements, e.g., nitrogen (N) supply. However, little systematically focused on the importance of the abovementioned factors. Here, we aim to assess the relative impact of N on cotton yield stability and identify the main drivers of yield variation using a three-year field experiment that consisted of six N supply rates that ranged from 0 to 300 kg ha-1. Cotton yield variation was evaluated by temporal stability (TS) and sustainable yield index (SYI). Results showed that cotton yield and yield components both varied with N rate and year. N rates that too high or too low were not conducive to cotton yield stability. Specially, 227 kg N ha-1 produced the maximum yield while the maximum TS and SYI were recorded at 120 kg N ha-1, suggesting an obvious trade-off between cotton yield and yield stability. Soil nutrient contents varied slightly with N rates, while they generally decreased over time. Path analysis showed that weather-related factors, N supply and soil nutrients together explained most of the cotton yield variation. Additionally, among weather-related factors, temperature during the growing season was the key driver of yield variation, followed by precipitation and photosynthetically active radiation. Alkali-hydrolyzale N in the soil layer of top 0.6 m was the most important soil attribute to positively determine cotton yield, followed by Olsen phosphorus and soil organic carbon. Overall, our study provided insights into evidence-based N management strategies design under site-specific conditions to improve the sustainability of agricultural production.

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