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Journal of Integrative Agriculture
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Optimization of fertilization combined with water-saving irrigation improves the water and nitrogen utilization efficiency of wheat and reduces nitrogen loss in the Nansi Lake Basin, China

Jingyi Feng1*, He Zhang1*, Hongyuan Zhang2, Xirui Kang1, Hui Wang1, Hong Pan1, Quangang Yang1, Zhongchen Yang1, Yajie Sun1, Yanhong Lou1#, Zhuge Yuping1#

1 National Research Centre for Efficient Utilisation of Soil and Fertiliser Resources, College of Resources and Environment, Shandong Agricultural University, Tai’an 271018, China

2 College of Agronomy, Ludong University, Yantai 264025, China

 Highlights 

l Four water and fertilizer regimes validate the WHCNS model’s accuracy.

l F2W2 notably reduces nitrogen loss while maintaining a stable yield.

l F2W2 reduces nitrogen leaching and ammonia volatilization significantly.

l The optimized F2W2 management improves water and nitrogen use efficiency.

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摘要  

河流和湖泊富营养化普遍存在,农业面源污染是其重要的诱因。本研究设置4种水肥处理:常规施肥+常规灌溉(CK)、减量控释肥+常规灌溉(F2W1)、等量控释肥替代+减量灌溉(F1W2)、减量控释肥+减量灌溉(F2W2采用水热碳氮耦合模型,研究优化水肥处理对南四湖小麦季农田水氮运移的影响。结果表明,控释肥替代常规肥灌溉都可以减少氮素流失。与对照相比,F2W1处理氮累积淋量和氨挥发量分别降低了8.90%41.67%;F1W2处理氮累积淋量和氨挥发量分别降低12.50%15.99%。与其他处理相比,F2W2处理在稳产的基础上显著降低了氮素,氮淋溶氨挥发量较对照处理分别降低了29.17%和27.13%,水分和氮利用效率分别提高了11.38%17.80%。综合来看四种水肥运筹中F2W2处理效果最优。研究结果进一步证实了优化水肥管理对提高小麦水氮利用效率的作用有利于缓解南四湖区农田氮素流失。



Abstract  

The eutrophication of rivers and lakes is becoming increasingly common, primarily because of pollution from agricultural non-point sources. We investigated the effects of optimized water and fertilizer treatments on agricultural non-point source pollution in the Nansi Lake region. The water heat carbon nitrogen simulator model was used to analyze water and nitrogen transport in Nansi Lake wheat fields. Four water and fertilizer treatments were set up: conventional fertilization and irrigation (CK), reduced controlled-release fertilizer and conventional irrigation (F2W1), an equal amount of controlled-release fertilizer and reduced irrigation (F1W2), and reduced controlled-release fertilizer and reduced irrigation (F2W2). The results indicated that the replacement of conventional fertilizers with controlled-release fertilizers, combined with reduced irrigation, led to reduced nitrogen loss. Compared with those of the CK, the cumulative nitrogen leaching and ammonia volatilization of F2W1 were reduced by 8.90 and 41.67%, respectively; under F1W2, the same parameters were reduced by 12.50 and 15.99%, respectively. Compared with the other treatments, F2W2 significantly reduced nitrogen loss while producing a stable yield. Compared with those of the CK, ammonia volatilization and nitrogen loss due to leaching were reduced by 29.17 and 27.13%, respectively, water and nitrogen use efficiencies increased by 11.38 and 17.80%, respectively. F2W2 showed the best performance among the treatments, considering water and fertilizer management. Our findings highlight the effectiveness of optimizing water and fertilizer application in improving the water and nitrogen use efficiency of wheat, which is of great significance for mitigating nitrogen loss from farmland in the Nansi Lake region.

Keywords:  controlled-release fertilizer        reduced irrigation        water heat carbon nitrogen simulator model        nitrogen loss  
Online: 22 March 2025  
Fund: 

This work was supported by the National Key Research and Development Program of China (2018YFD0800303) and the Major Science and Technology Innovation Projects in Shandong Province, China (2021CXGC010804).

About author:  Jingyi Feng, E-mail: sdaufjy2018@163.com; He Zhang, E-mail: 17862988181@163.com; #Correspondence Yanhong Lou, Tel: +86-538-8242810, E-mail: yanhonglou1985@163.com; Zhuge Yuping, Tel: +86-538-8243918, E-mail: zhugeyp@sdau.edu.cn

Cite this article: 

Jingyi Feng, He Zhang, Hongyuan Zhang, Xirui Kang, Hui Wang, Hong Pan, Quangang Yang, Zhongchen Yang, Yajie Sun, Yanhong Lou, Zhuge Yuping. 2025. Optimization of fertilization combined with water-saving irrigation improves the water and nitrogen utilization efficiency of wheat and reduces nitrogen loss in the Nansi Lake Basin, China. Journal of Integrative Agriculture, Doi:10.1016/j.jia.2025.03.013

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