DMPP mitigates N 2 O and NO productions by inhibiting ammonia-oxidizing bacteria in an intensified vegetable field under different temperature and moisture regimes

文献类型： 外文期刊

第一作者： Zhang, Xi

作者： Zhang, Xi;Xu, Xintong;Wang, Chenyuan;Zhang, Qianqian;Dong, Yubing;Xiong, Zhengqin;Zhang, Xi;Zhang, Qianqian;Dong, Yubing

作者机构：

关键词： 3,4-dimethylpyrazole phosphate; environment condition; gene abundance; nitrification inhibitor; nitrite accumulation; soil water content

期刊名称：PEDOSPHERE （ 影响因子：5.2； 五年影响因子：5.3 ）

ISSN： 1002-0160

年卷期： 2024 年 34 卷 3 期

页码：

收录情况： SCI

摘要： Vegetable soils with high nitrogen input are major sources of nitrous oxide (N 2 O) and nitric oxide (NO), and incorporation of the nitrification inhibitor 3, 4-dimethylpyrazole phosphate (DMPP) into soils has been documented to effectively reduce emissions. However, the efficiency of DMPP in terms of soil N 2 O and NO mitigations varies greatly depending on soil temperature and moisture levels. Thus, further evaluations of DMPP efficiency in diverse environments are required to encourage widespread application. A laboratory incubation study (28 d) was established to investigate the interactive effects of DMPP, temperature (15, 25, and 35 degrees C), and soil moisture (55% and 80% of water -holding capacity (WHC)) on net nitrification rate, N 2 O and NO productions, and gene abundances of nitrifiers and denitrifiers in an intensive vegetable soil. Results showed that incubating soil with 1% DMPP led to partial inhibition of the net nitrification rate and N 2 O and NO productions, and the reduction percentage of N 2 O production was higher than that of NO production (69.3% vs . 38.2%) regardless of temperature and soil moisture conditions. The increased temperatures promoted the net nitrification rate but decreased soil N 2 O and NO productions. Soil moisture influenced NO production more than N 2 O production, decreasing with the increased moisture level (80%). The inhibitory effect of DMPP on cumulative N 2 O and NO productions decreased with increased temperatures at 55% WHC. Conversely, the inhibitory effect of DMPP on cumulative N 2 O production increased with increased temperatures at 80% WHC. Based on the correlation analyses and automatic linear modeling, the mitigation of both N 2 O and NO productions from the soil induced by DMPP was attributed to the decreases in ammonia -oxidizing bacteria (AOB) amoA gene abundance and NO - 2 -N concentration. Overall, our study indicated that DMPP reduced both N 2 O and NO productions by regulating the associated AOB amoA gene abundance and NO - 2 -N concentration. These findings improve our insights regarding the implications of DMPP for N 2 O and NO mitigations in vegetable soils under various climate scenarios.

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