Short-term biotic removal of dissolved organic nitrogen (DON) compounds from soil solution and subsequent mineralisation in contrasting grassland soils
Short-term biotic removal of dissolved organic nitrogen (DON) compounds from soil solution and subsequent mineralisation in contrasting grassland soils
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DOI：
10.1016/j.soilbio.2016.01.017
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发表时间：
2016-05
影响因子：
9.7
通讯作者：
A. Carswell;P. Hill;Davey L. Jones;M. Blackwell;P. Johnes;D. Chadwick
中科院分区：
文献类型：
--
作者：
A. Carswell;P. Hill;Davey L. Jones;M. Blackwell;P. Johnes;D. Chadwick
低分子量可溶性有机氮化合物的循环是土壤有机质周转的重要组成部分。我们确定如何迅速草原土壤可以循环尿素，相比的氨基酸l-丙氨酸，和肽-三丙氨酸。使用天然存在的浓度of 14 C-标记的化合物的去除率从土壤溶液和随后的矿化进行了测量。所有三种化合物的生物去除和随后的矿化为CO2发生在几分钟内。这项研究首次证明了土壤微生物量快速去除低浓度尿素的潜力。
Cycling of low molecular weight dissolved organic nitrogen compounds constitutes an important component of soil organic matter turnover in soils. We determined how rapidly grassland soils can cycle urea, compared to the amino acidl-alanine, and the peptidel-trialanine. Using naturally occurring concentrations of14C-labelled compounds the rates of removal from soil solution and subsequent mineralisation were measured. Biotic removal of all three compounds and subsequent mineralisation to CO2occurred within minutes. This research has demonstrated, for the first time, the potential for rapid removal of urea at low concentrations by the soil microbial biomass.