Biochar adsorbed ammonia is bioavailable
Biochar adsorbed ammonia is bioavailable
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DOI：
10.1007/s11104-011-0870-3
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发表时间：
2011
期刊：
影响因子：
4.9
通讯作者：
A. Taghizadeh-Toosi;T. Clough;R. Sherlock;L. Condron
中科院分区：
文献类型：
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作者：
A. Taghizadeh-Toosi;T. Clough;R. Sherlock;L. Condron
生物炭是生物能源开采过程中生物质低温热解的副产品，将其掺入土壤中作为潜在的碳固存工具受到全球关注。生物质炭影响土壤氮素转化，其吸收氨的能力已得到公认。氨的人为排放由于负面的环境影响和经济损失而需要减轻。在这里，我们使用氮的同位素表明，生物炭吸附的氨氮在环境空气中是稳定的，但容易生物可利用的，当放置在土壤中。当生物炭，含有吸附的15 N标记的氨，被纳入土壤中的15 N回收率的根平均为6.8%，但在叶组织从26.1%至10.9%，由于不同的生物炭性能与植物15 N回收率更大时，酸性生物炭被用来捕获氨。15 N的回收率为土壤全氮（有机+无机）的45%~ 29%。我们提供了一个协同减排方案的概念证明，其中人为氨排放可以使用生物炭捕获，并在土壤中生物可利用，从而导致作物的氮捕获，同时螯合土壤中的碳。
Biochar is produced as a by-product of the low temperature pyrolysis of biomass during bioenergy extraction and its incorporation into soil is of global interest as a potential carbon sequestration tool. Biochar influences soil nitrogen transformations and its capacity to take up ammonia is well recognized. Anthropogenic emissions of ammonia need to be mitigated due to negative environmental impacts and economic losses. Here we use an isotope of nitrogen to show that ammonia-N adsorbed by biochar is stable in ambient air, but readily bioavailable when placed in the soil. When biochars, containing adsorbed15N labelled ammonia, were incorporated into soil the15N recovery by roots averaged 6.8% but ranged from 26.1% to 10.9% in leaf tissue due to differing biochar properties with plant15N recovery greater when acidic biochars were used to capture ammonia. Recovery of15N as total soil nitrogen (organic+inorganic) ranged from 45% to 29% of15N applied. We provide a proof of concept for a synergistic mitigation option where anthropogenic ammonia emissions could be captured using biochar, and made bioavailable in soils, thus leading to nitrogen capture by crops, while simultaneously sequestering carbon in soils.