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Unveiling the environmental and socioeconomic benefits of precision nitrogen management for paddy fields in subtropical China

文献类型： 外文期刊

作者： Zhang, Ke 1 ; Liang, Xia 2 ; Zhang, Yushu 2 ; Liu, Xiaojun 1 ; Cao, Qiang 1 ; Zhu, Yan 1 ; Cao, Weixing 1 ; Chen, Deli 2 ; Tian, Yongchao 1 ;

作者机构： 1.Nanjing Agr Univ, Natl Engn & Technol Ctr Informat Agr, Engn Res Ctr Smart Agr, Key Lab Crop Syst Anal & Decis Making,Minist Educ,, Nanjing 210095, Peoples R China

2.Univ Melbourne, Fac Vet & Agr Sci, Parkville, Vic 3010, Australia

3.Fujian Acad Agr Sci, Inst Soil & Fertilizer, Fuzhou 350013, Peoples R China

关键词： Precision agriculture; Optimized fertilizer management; Nitrogen use efficiency; Life cycle assessment

期刊名称：EUROPEAN JOURNAL OF AGRONOMY （ 影响因子：5.722； 五年影响因子：6.384 ）

ISSN： 1161-0301

年卷期： 2023 年 142 卷

页码：

收录情况： SCI

摘要： Precision fertilizer management has been well proved to allow farmers to synchronize nitrogen (N) fertilizer input with crop demand to improve grain yield and N use efficiency (NUE). However, the potential environ-mental benefits of precision fertilizer management have been less evaluated and appreciated. In this study, we selected five most commonly used optimized N fertilizer management strategies (OPM), which are Flav-basal strategy, site-specific N management strategy, optimization algorithm, N nutrient index-based fertilizer man-agement strategy and normalized difference red-edge based fertilizer management strategy, and compared with farmer practices (FP) in yield, resource inputs (i.e., mineral, land, labor, etc.), energy use, NUE, greenhouse gases emissions (GHGs), NH3, NOX and SO2 emissions, N leaching and runoff, and economic returns in Chinese southeast paddy fields. Our results showed that the OPM strategies could increase grain yield by 13.5 % at most, NUE by 3-10 % and harvest index by 1-7 kg kg-1 compared to the FP with the optimal total N application was approximately 270-290 kg N ha-1. Agronomic benefits generally increased by $ 145-620 ha-1, with the shoot biomass increasing by $ 90-185 ha-1 of adopting through OPM for rice production. Additional benefits from the mitigation of GHGs emissions could significantly increase the environmental benefits of precision N manage-ment. Altogether, the environmental benefits of OPM are considerable, and they are likely to be adopted by farmers if new incentives from the government.

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