Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China.
PLoS One. 2013;8(3):e60146. doi: 10.1371/journal.pone.0060146. Epub 2013 Mar 29.
In response to rising interest over the years, many experiments and several models have been devised to understand emission of nitrous oxide (N2O) from agricultural soils. Notably absent from almost all of this discussion is iron, even though its role in both chemical and biochemical reactions that generate N2O was recognized well before research on N2O emission began to accelerate. We revisited iron by exploring its importance alongside other soil properties commonly believed to control N2O production in agricultural systems. A set of soils from California's main agricultural regions was used to observe N2O emission under conditions representative of typical field scenarios. Results of multivariate analysis showed that in five of the twelve different conditions studied, iron ranked higher than any other intrinsic soil property in explaining observed emissions across soils. Upcoming studies stand to gain valuable information by considering iron among the drivers of N2O emission, expanding the current framework to include coupling between biotic and abiotic reactions.
近年来，由于人们对一氧化二氮（N2O）排放的兴趣不断增加，设计了许多实验和模型来了解农业土壤中 N2O 的排放。几乎所有这些讨论都忽略了铁，尽管早在研究 N2O 排放开始加速之前，人们就已经认识到它在产生 N2O 的化学和生化反应中的作用。我们通过探索铁与其他通常被认为控制农业系统中 N2O 产生的土壤特性的重要性，重新审视了铁。一组来自加利福尼亚主要农业区的土壤被用于在典型田间情景下观察 N2O 的排放。多元分析的结果表明，在所研究的十二种不同条件中的五种条件下，铁在解释跨土壤观测排放方面的解释能力高于任何其他内在土壤特性。即将进行的研究通过将铁视为 N2O 排放的驱动因素之一，将当前的框架扩展到包括生物和非生物反应之间的耦合，将获得有价值的信息。
