数字农科院2.0

Targeted fortification of phenolic hydroxyl groups in humic acid to further enhance urea use efficiency in maize seedling

文献类型： 外文期刊

作者： Yingqiang Zhang;Shuiqin Zhang;Ji Xue;Bingqiang Zhao;Yanting Li;Meng Xu;Jiukai Xu;Jianyuan Jing;Liang Yuan

作者机构：

关键词： Ball milling;CuO@Al2O3 catalyst;Humic acid;Nitrogen utilization;Phenolic hydroxyl group

期刊名称： Environmental Technology and Innovation

ISSN： 2352-1864

年卷期： 2025 年 37 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Phenolic hydroxyl group (ArOH) plays an important role in humic acid (HA) enhancing nitrogen (N) fertilizer efficiency. However, the content of ArOH in HA is usually low, while its traditional enriching modification are inefficient or even showed a potential toxicity risk. In this work, we developed a novel catalyst named CuO@Al2O3 enriched with mesopores and oxygen vacancies, and target-modified HA to increase its ArOH using a feasible mechanical catalytic method. The results showed that phenolic-rich HA (CuO@Al2O3-HA) were successfully prepared with 40 % higher ArOH content than HA, which was consistent with the 43.13 % increase in C-O/Ar-O content in XPS C1s spectra. Compared to RHA, CuO@Al2O3-HA had less tannin attributed to the Ar-C bond breakage catalyzed by CuO@Al2O3 to form ArOH. Subsequently, we prepared CuO@Al2O3-HA-enhanced urea (CuO@Al2O3-HAU), and found that CuO@Al2O3-HAU improved maize seedling growth by the elevation of leaf chlorophyll content (by 8.78 %) and lowering N loss by NH3 volatilization inhibition (by 12.43 %), thus enhanced the biomass and N uptake of maize seedling by 11.29 % and 21.22 %, respectively, compared to RHA-enhanced urea (RHAU). Therefore, this study provided a method to enrich the ArOH content of HA, and a green approach for the upgrading of high-efficiency urea products.

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