Nitrate production is mainly heterotrophic in an acid dairy soil with high organic content in Australia
Nitrate production is mainly heterotrophic in an acid dairy soil with high organic content in Australia
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DOI：
10.1007/s00374-015-1026-z
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发表时间：
2015-06
影响因子：
6.5
通讯作者：
Rui Liu;H. Suter;H. Hayden;Ji‐Zheng He;Deli Chen
中科院分区：
文献类型：
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作者：
Rui Liu;H. Suter;H. Hayden;Ji‐Zheng He;Deli Chen
利用硝化抑制剂乙炔和15 N同位素技术进行了实验室培养试验，以确定澳大利亚不同地区3种酸性土壤中异养和自养硝化作用的相对显著性。异养硝化作用占总硝化作用的20- 88%。在酸性较弱的Glenormiston土壤（pHw6.2，有机碳含量5.6%）中，硝化作用主要为自养硝化，异养硝化仅占20%。然而，在酸性更强、有机碳含量更高的Longworry土壤（pHw4.8，有机碳含量9.3%）中，异养硝化作用是主要的NO3−产生途径，占总硝化作用的88%。
A laboratory incubation experiment was conducted using the nitrification inhibitor acetylene and15N isotope techniques in order to determine the relative significance of heterotrophic and autotrophic nitrification in three acid soils from different locations in Australia. The contribution of heterotrophic nitrification to total nitrification was found to vary from 20–88 % amongst the three soils. In the less acidic Glenormiston soil (pHw6.2, organic C content 5.6 %), nitrification was largely autotrophic with heterotrophic nitrification accounting for only 20 %. However, in the more acidic and higher organic C content Longworry soil (pHw4.8 and organic C content 9.3 %), heterotrophic nitrification was the predominant NO3−production pathway accounting for 88 % of total nitrification.