title: Iron: the forgotten driver of nitrous oxide production in agricultural soil.
abstract: 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.
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China.
authors.forename: Xia
authors.initials: X
authors.lastname: Zhu
authors.forename: Lucas C R
authors.initials: LC
authors.lastname: Silva
authors.forename: Timothy A
authors.initials: TA
authors.lastname: Doane
authors.forename: William R
authors.initials: WR
authors.lastname: Horwath
mesh_terms: D000383:Agriculture; D007501:Iron / Q000737:chemistry*; D009609:Nitrous Oxide / Q000737:chemistry*; D012987:Soil / Q000737:chemistry*
chemical_list: D012987:Soil; D007501:Iron; D009609:Nitrous Oxide
references.citation: Nat Rev Microbiol. 2010 Nov;8(11):779-90
references.pmid: 20948551
references.citation: Front Microbiol. 2012 Feb 21;3:61
references.pmid: 22363333
references.citation: Talanta. 2000 Apr 3;51(4):701-7
references.pmid: 18967902
references.citation: Appl Environ Microbiol. 1996 Apr;62(4):1458-60
references.pmid: 16535298
references.citation: Plant Physiol. 1945 Oct;20(4):517-39
references.pmid: 16654007
references.citation: Nat Rev Microbiol. 2006 Oct;4(10):752-64
references.pmid: 16980937
references.citation: Philos Trans R Soc Lond B Biol Sci. 2012 May 5;367(1593):1157-68
references.pmid: 22451101
references.citation: Appl Environ Microbiol. 1987 Jul;53(7):1536-40
references.pmid: 16347384
references.citation: J Gen Microbiol. 1953 Feb;8(1):58-65
references.pmid: 13035032