Reduction in soil N2O emissions by pH manipulation and enhanced nosZ gene transcription under different water regimes.
Reduction in soil N2O emissions by pH manipulation and enhanced nosZ gene transcription under different water regimes.
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DOI：
10.1016/j.envpol.2017.12.066
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发表时间：
2018-04
影响因子：
8.9
通讯作者：
M. Shaaban;Yu-peng Wu;M. S. Khalid;Q. Peng;Xiangyu Xu;Lei Wu;A. Younas;S. Bashir;Yongliang Mo;Shan Lin;M. Zafar-ul-Hye;M. Abid;R. Hu
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文献类型：
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作者：
M. Shaaban;Yu-peng Wu;M. S. Khalid;Q. Peng;Xiangyu Xu;Lei Wu;A. Younas;S. Bashir;Yongliang Mo;Shan Lin;M. Zafar-ul-Hye;M. Abid;R. Hu
过去，已经进行了几项研究来检查农业土壤中的一氧化二氮（N2 O）排放。然而，N_2O的排放，特别是在酸性土壤改良过程中的研究很少。我们进行了本研究使用水稻油菜轮作土壤（pH 5.44），与白云石（0，1和2 g kg− 1土壤）在60%的水填充孔隙（WFPS）和洪水。在整个研究过程中，测量了N2 O排放量和几种土壤性质（pH值、NH 4+单键N、NO3−-N和nosZ基因转录物）。在两种水分条件下（60%WFPS和淹水），施用白云石引起土壤pH值的增加，从而引发土壤N转化和nosZ基因控制N2 O排放的转录本。60%WFPS处理土壤N2 O排放量高于淹水处理，白云石通过增强nosZ基因转录，显著降低了两种水分条件下土壤N2 O排放量。结果表明，施用白云石改善土壤酸度可通过促进nosZ基因转录而显著减少N2 O排放。
Several studies have been carried out to examine nitrous oxide (N2O) emissions from agricultural soils in the past. However, the emissions of N2O particularly during amelioration of acidic soils have been rarely studied. We carried out the present study using a rice-rapeseed rotation soil (pH 5.44) that was amended with dolomite (0, 1 and 2 g kg−1soil) under 60% water filled pore space (WFPS) and flooding. N2O emissions and several soil properties (pH, NH4+single bondN, NO3−-N, andnosZgene transcripts) were measured throughout the study. The increase in soil pH with dolomite application triggered soil N transformation and transcripts ofnosZgene controlling N2O emissions under both water regimes (60% WFPS and flooding). The 60% WFPS produced higher soil N2O emissions than that of flooding, and dolomite largely reduced N2O emissions at higher pH under both water regimes through enhanced transcription ofnosZgene. The results suggest that ameliorating soil acidity with dolomite can substantially mitigate N2O emissions through promotingnosZgene transcription.