Humic acid urea enhanced productivity and reduced active nitrogen loss in summer maize-winter wheat cropping system: A field lysimeter experiment

文献类型： 外文期刊

第一作者： Liu, Min

作者： Liu, Min;Xu, Meng;Xu, Jiukai;Zhang, Shuiqin;Li, Yanting;Yuan, Liang;Zhao, Bingqiang

作者机构：

关键词： Humic acid urea; High-efficiency fertilizer; Nitrogen uptake; Nitrogen loss; Nitrogen footprint; Field lysimeter

期刊名称：FIELD CROPS RESEARCH （ 影响因子：6.4； 五年影响因子：6.6 ）

ISSN： 0378-4290

年卷期： 2024 年 319 卷

页码：

收录情况： SCI

摘要： Context: Humic acid urea (HAU) has become the leading product of high-efficiency nitrogen (N) fertilizer worldwide. Value-added urea products represented by HAU account for 80 % of the market share of highefficient urea in China. To our knowledge, precise field monitoring of the agronomy and environmental performance of HAU has not been conducted. Objective: We aimed to examine the effect of HAU on grain yield, N uptake, NH3 volatilization, N2O emission, and NO3- leaching and to clarify the differences in productivity levels and N footprints between HAU and common urea (U) applied in field grain production. Methods: From 2021-2023, a randomized design experiment was conducted during a summer maize-winter wheat rotation system using field lysimeters. Three N treatments, no N (CK), U, and HAU, were administered in the experiment, and each treatment was repeated three times. Results: Compared with U, HAU increased the grain yield of winter wheat by 5.14-6.24 % and the grain yield of summer maize by 4.48-11.18 %. In the summer maize seasons, the NH3 volatilization accumulation and N2O emissions of HAU were significantly reduced (14.92-19.32 % and 21.01-25.16 %, respectively). In the winter wheat seasons, the NH3 volatilization accumulation and N2O emission of HAU were significantly reduced (19.44-19.94 % and 17.79 %-26.10 %, respectively). In summer maize, NO3- leaching losses occurred in 2021 and 2022 under HAU treatment was 8.40 % and 54.65 % lower, respectively, compared with U. Leaching losses in the 2021-2022 winter wheat season were reduced by 38.31 % under HAU compared with that under U. The N footprint of HAU was significantly reduced in the summer maize and winter wheat seasons by 10.57-20.52 % and 15.11-15.91 % compared with that under U. Furthermore, HAU reduced N loss and improved N use efficiency and soil residue rate in the summer maize-winter wheat rotation system. Conclusion: HAU application reduced the loss of active N in all three main pathways and increased shoot N uptake and soil N residual, thereby contributing to not only the increase in grain yield but also the mitigation of nitrogen field pollution and the minimization of unnecessary urea waste. Implications: This lysimeter-based study provides quantification of the evidence supporting HAU as a highly efficient fertilizer, which contributed to increased productivity of the rotation system and enhanced resilience in environmental sustainability.

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