Evaluation of nitrogen behavior according to combination of nitrogen stabilizers in subtropical cornfield

文献类型： 外文期刊

第一作者： Wei, Zhuo

作者： Wei, Zhuo;Yao, Shurun;Wei, Zhuo;Wang, Jim J.;Pensky, Scott M.;Meng, Yili;Meng, Yili;Dodla, Syam;Park, Jong-Hwan

作者机构：

关键词： Nitrogen stabilizer; DCD; DMPP; NBPT; Nitrous oxide; Corn; NUE

期刊名称：ENVIRONMENTAL EARTH SCIENCES （ 影响因子：2.8； 五年影响因子：3.0 ）

ISSN： 1866-6280

年卷期： 2025 年 84 卷 13 期

页码：

收录情况： SCI

摘要： Nitrogen (N) fertilizer management in agricultural field affects soil N budget. As N stabilizer, nitrification inhibitor (NI) and urease inhibitor (UI) were widely used to reduce N loss. In this study, a two-year field experiment was conducted to investigate the efficiency of separated and integrated use of dicyandiamide (DCD) and 3,4-dimethyl pyrazole phosphate (DMPP), as well as UI (NBPT) along with N fertilizer UAN on N loss in Louisiana subtropical cornfield (Check, UAN, UAN + DCD, UAN + DMPP, UAN + DMPPx2, UAN + NBPT, and UAN + DCD + NBPT). Specifically, N loss were determined by indicators of nitrous oxide (N2O) gas emission, corn yield, N use efficiency (NUE), and ratio of NH4+ to (NO3- + NO2-). Results show that all N stabilizers reduced the N2O comparing to UAN only, with efficiency order of DMPPx2 > NBPT + DCD > DCD > DMPP > NBPT. In addition, N2O emission showed response to N stabilizers with same the trend in morning and night but significantly (p < 0.05) higher emission in morning than night. More, DMPP, DMPPx2, and NBPT + DCD significantly (p < 0.05) increased NUE. Further, DMPPx2 and DCD + NBPT show significant (p < 0.05) positive correlations with NH4+ while negative correlation with NO3- + NO2- in soil. Overall, combination applications of DCD + NBPT was suggested in Louisiana cornfield with high efficiency on reducing N loss through N2O, improving fertilizer recovery, and reducing the conversion of NH4+-N to NO3-/NO2- -N.

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