Institute of Soil Research, Department of Forest and Soil Sciences, University of Natural Resources and Life Sciences Vienna (BOKU), Peter Jordan Strasse 82, A-1190, Vienna, Austria.
Environ Sci Pollut Res Int. 2018 Apr;25(11):11173-11177. doi: 10.1007/s11356-018-1658-2. Epub 2018 Mar 8.
Biochar (BC) application to soils is of growing interest as a strategy to improve soil fertility and mitigate climate change. However, BC-induced alterations in the soil N cycle are currently under debate. BC has recently been shown to accelerate the emissions of NO via the biotic ammonium oxidation pathway, which results in lower nitrogen use efficiency and environmentally harmful losses of NO and/ or NO. To avoid these potential losses, the use of nitrification inhibitor (NI) could provide a useful mitigation strategy for BC-amended agricultural fields. Here, we tested the sorption behavior of a model NI, the synthetic 3,4-dimethylpyrazole phosphate (DMPP) on 15-month-aged soil-BC mixtures. We saw that BC additions increased DMPP sorption to varying extents depending on BC feedstock type and pyrolysis temperature. The highest sorption was found for BC pyrolyzed at a lower temperature. BC effects on soil physico-chemical characteristics (i.e., hydrophobicity) seem to be important factors.
生物炭（BC）应用于土壤是一种提高土壤肥力和缓解气候变化的策略，越来越受到关注。然而，BC 对土壤氮循环的影响目前仍存在争议。最近的研究表明，BC 通过生物铵氧化途径加速了 NO 的排放，从而导致氮利用效率降低，以及 NO 和/或 NO 的环境有害损失。为了避免这些潜在的损失，硝化抑制剂（NI）的使用可为添加 BC 的农业领域提供一种有用的缓解策略。在这里，我们测试了模型硝化抑制剂 3,4-二甲基吡唑磷酸盐（DMPP）在 15 个月龄土壤-BC 混合物上的吸附行为。我们发现，BC 的添加量根据 BC 原料类型和热解温度的不同，对 DMPP 的吸附程度也有所不同。在较低温度下热解的 BC 表现出最高的吸附性。BC 对土壤物理化学特性（如疏水性）的影响似乎是重要因素。
