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Can organic substitution of chemical nitrogen fertilizer realize the co-benefits of cleaner and sustainable citrus production? A systemic evaluation by a lysimeter experiment

文献类型： 外文期刊

作者： Niu, Runzheng 1 ; Kang, Furong 1 ; Zhao, Li 1 ; Zhao, Huanyu 1 ; Xie, Jiawei 1 ; Xiong, Huaye 1 ; Wang, Yuheng 1 ; Wang, Yuehong 5 ; Wang, Jie 1 ; Zhao, Jingkun 6 ; Shi, Xiaojun 1 ; Zhang, Yueqiang 1 ; Lakshmanan, Prakash 2 ;

作者机构： 1.Southwest Univ, Coll Resources & Environm, Chongqing 400716, Peoples R China

2.Southwest Univ, Interdisciplinary Res Ctr Agr Green Dev Yangtze Ri, Chongqing 400716, Peoples R China

3.Agr Technol Res & Serv Ctr Changshou Dist Chongqin, Chongqing 401220, Peoples R China

4.Shandong Acad Agr Sci, Inst Agr Resource & Environm, Jinan 250100, Peoples R China

5.Hechuan Dist Grain & Oil Dev Guidance Stn, Chongqing, Peoples R China

6.Chongqing Agrotech Extens Stn, Chongqing 401121, Peoples R China

7.Beijing Changping Soil Qual Natl Observat & Res St, Beijing, Peoples R China

8.Guangxi Acad Agr Sci, Sugarcane Res Inst, Nanning, Peoples R China

9.Univ Queensland, Queensland Alliance Agr & Food Innovat, St Lucia, Qld 4067, Australia

关键词： Organic substitution; N leaching; NH 3 volatilization; Citrus yield; Quality; Soil N balance

期刊名称：EUROPEAN JOURNAL OF AGRONOMY （ 影响因子：5.5； 五年影响因子：5.9 ）

ISSN： 1161-0301

年卷期： 2025 年 170 卷

页码：

收录情况： SCI

摘要： Citrus is the world's largest fruit crop, and nitrogen (N) management is a crucial factor for achieving higher fruit yield and quality, lower environmental risks in global citrus producing systems. Substitution of chemical N fertilizer by organic fertilizer is increasingly promoted for better yield and quality. However, their extent to reduce reactive N (Nr) loss for sustainable citrus production is difficult to evaluate in field condition and thus remain unclear. Therefore, citrus lysimeter equipments (diameter, 1.25 m; highth, 1.10 m; volume, 1.35 m3) with different organic fertilizer substitution ratios (0 %, 25 %, 50 %, 75 % and 100 %) were set to quantify the optimal range of organic substitution for balanced yield, quality and Nr loss during 2021-2023. Results showed that N leaching was the most dominant N loss pathway (10.7 %-75.6 %), and it was reduced remarkably by organic fertilizer substitution (123.9-267.9 kg N ha-1) compared with chemical N fertilizer (NPK) treatment (164.7-304.2 kg N ha-1). Ammonia (NH3) volatilization (0.5 %-4.0 %) was the second largest N loss pathway which was also significantly reduced by organic fertilizer substitution (3.4-10.2 kg N ha-1) compared with NPK use (6.9-12.8 kg N ha-1). Further, the organic substitution also resulted in a positive soil N balance and increased citrus yield (4.3 %-8.3 %) and citrus quality traits. The positive impact of organic fertilizer substitution was dose-dependent; and integrating with agronomic, economic and environmental indicators, 39 %-63 % organic substitution of chemical N fertilizer contributed to cleaner and sustainable citrus production. These findings contribute to citrus N management and waste resource utilization, providing knowledge and technical supports to achieve cleaner and sustainable citrus producing systems.

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