生物炭在减少氮气体排放方面的潜在价值。
The potential value of biochar in the mitigation of gaseous emission of nitrogen.
机构信息
Centre for Environmental Risk Assessment and Remediation, University of South Australia, Mawson Lakes, SA 5095, Australia.
Global Centre for Environmental Remediation (GCER), Advanced Technology Centre, Faculty of Science, The University of Newcastle, Callaghan, NSW, 2308, Australia; Cooperative Research Centre for Contaminant Assessment and Remediation of the Environment (CRC CARE), The University of Newcastle, Callaghan, NSW 2308, Australia.
出版信息
Sci Total Environ. 2018 Jan 15;612:257-268. doi: 10.1016/j.scitotenv.2017.08.242. Epub 2017 Sep 1.
Nitrogen (N) losses through gaseous emission of ammonia (NH) and nitrous oxide (NO) can contribute to both economic loss and environmental degradation. This study examined the effect of biochar and a chemical nitrification inhibitor, dicyandiamide (DCD), on N transformation and N losses via gaseous emission of NH and NO from agricultural soils treated with a range of organic and inorganic N sources. The addition of DCD reduced NO emission from both organic and inorganic N sources treated soils by 75%, but increased ammonium (NH) concentration and subsequently induced high NH emission from the soils. In contrast, the addition of biochar reduced both NO and NH emissions from organic and inorganic N sources treated soils by 23% and 43%, respectively. The effectiveness of biochar and DCD in reducing NH volatilization and NO emission depends on the nature of the N sources and their initial mineral N concentration. The study demonstrated that biochar can be used to mitigate N losses resulting from NH volatilization and NO emission.
氮（N）通过氨气（NH）和一氧化二氮（NO）的气态排放损失可能导致经济损失和环境恶化。本研究考察了生物炭和一种化学硝化抑制剂双氰胺（DCD）对施用各种有机和无机 N 源的农业土壤中 N 转化和通过气态排放 NH 和 NO 损失的影响。DCD 的添加减少了 75%来自有机和无机 N 源处理土壤的 NO 排放，但增加了铵（NH）浓度，随后导致土壤中产生高浓度的 NH 排放。相比之下，生物炭的添加分别减少了有机和无机 N 源处理土壤中 23%和 43%的 NO 和 NH 排放。生物炭和 DCD 减少 NH 挥发和 NO 排放的有效性取决于 N 源的性质及其初始矿化 N 浓度。研究表明，生物炭可用于减少因 NH 挥发和 NO 排放而导致的 N 损失。
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