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Fate of applied urea N-15 in a soil-maize system as affected by urease inhibitor and nitrification inhibitor

文献类型： 外文期刊

作者： Zhang, L. 1 ; Wu, Z. 1 ; Jiang, Y. 1 ; Chen, L. 1 ; Song, Y. 1 ; Wang, L. 3 ; Xie, J. 3 ; Ma, X. 4 ;

作者机构： 1.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China

2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China

3.Jilin Acad Agr Sci, Agr Environm & Resources Res Ctr, Changchun, Peoples R China

4.Inst Heilongjiang Acad Agr Sci, Harbin, Peoples R China

关键词： nitrogen;fertilizer;N losses;N use efficiency

期刊名称：PLANT SOIL AND ENVIRONMENT （ 影响因子：1.799； 五年影响因子：2.169 ）

ISSN： 1214-1178

年卷期： 2010 年 56 卷 1 期

页码：

收录情况： SCI

摘要： A micro-plot field experiment with reduced urea N-15 application was conducted to study the effects of urease inhibitor NBPT (N-(n-butyl) thiophosphoric triamide) and nitrification inhibitor DMPP(3,4-dimethyl-1H-pyrazolium dihydrogen) on the fate of applied urea N-15; it aimed to find an efficient way to reduce the urea N application rate while improving the agronomic and environmental benefits. Five treatments were installed, i.e., 180 kg N/ha (N-1, conventional application rate), 126 kg N/ha (N-2, reduced to 70% conventional application rate), N-2 + NBPT, N-2 + DMPP, and N-2 + NBPT + DMPP. Compared with treatment N-1, all the other treatments had a significantly higher total N-15 recovery by both soil and plant (P < 0.05 48.20, 41.39, 37.69, 38.85 and 34.83% soil recovery for N-2 + NBPT + DMPP, N-2 + DMPP, N-2 + NBPT, N-2 and N-1 treatment, respectively; and 42.68, 40.86, 40.25, 37.18 and 36.30% plant recovery for N-2 + NBPT + DMPP, N-2 + DMPP, N-2 + NBPT, N-2, and N-1 treatment, respectively). In the plant N-15 recovery, the N-15 absorbed in grain/stem was highest in treatment N-2 + NBPT + DMPP. The maize biomass and the maize yield had a slight increase in treatment N-2 + NBPT + DMPP, compared with those in treatment N-1. In sum, for the maize production in study area, N-2 + NBPT + DMPP application method would be a feasible way to ensure the normal maize yield while improving yield quality, saving urea fertilizer, and protecting the environment.

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