Untitled

Pedersen, Henning; Dunkin, Kristie A.; Firestone, Mary K.

doi:10.1023/a:1006059930960

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We would expect the relatively high SOC concentration (27.5 g kg À1 ) and low pH (5.9) in the soil of the present study to favor heterotrophic nitrification. Fungi have been found to be more acid tolerant than bacteria and more dominant in soil with high recalcitrant SOM concentration [Strickland and Rousk, 2010], and are considered to be the most efficient microorganisms performing heterotrophic nitrification [Pederson et al, 1999]. McLain and Martens [2006] demonstrated that fungi played a predominant role in N 2 O production via heterotrophic nitrification in a semiarid soil.…”

Section: 1002/2014gb004871mentioning

confidence: 99%

Nitrous oxide emissions from cultivated black soil: A case study in Northeast China and global estimates using empirical model

Chen

Ding

Luo

et al. 2014

Global Biogeochemical Cycles

View full text Add to dashboard Cite

Manure application is effective in promoting soil carbon sequestration, but its impact on N2O emission is not well understood. A field experiment was conducted in a maize‐cultivated black soil in Northeast China with six treatments: inorganic fertilizer (NPK), 75% inorganic fertilizer N plus 25% pig (PM1) or chicken (CM1) manure N, 50% inorganic fertilizer N plus 50% pig (PM2) or chicken (CM2) manure N, and no N fertilizer (CK). Annual N2O emission significantly increased from 0.34 kg N ha−1 for CK to 0.86 kg N ha−1 for NPK and further to 1.65, 1.02, 1.17, and 0.93 kg N ha−1 for PM1, CM1, PM2, and CM2, respectively. A 15N tracing study showed that 71–79% of total N2O was related to nitrification at 30–70% water‐filled pore space (WFPS), and heterotrophic nitrification contributed 49% and 25% to total N2O at 30% and 70% WFPS, respectively. In an incubation, N2O emission was only stimulated when nitrate and glucose were applied together at 60% WFPS, indicating that denitrification was carbon limited. PM had a stronger effect on denitrification than CM due to higher decomposability, and the lower N2O emission at higher manure application rate was associated with decreased mineral N supply. After compiling a worldwide database and establishing an empirical model that related N2O emissions (kg N ha−1) to precipitation (Pr, m) and fertilizer N application rate (Nr, kg N ha−1) (N2O = 1.533Pr + 0.0238PrNr), annual N2O emission from global‐cultivated black soil applied with inorganic fertilizer N was estimated as 347 Gg N. Our results suggested that N2O emission from cultivated black soils in China was low primarily due to low precipitation and labile organic carbon availability, and would be stimulated by manure application; thus, increased N2O emission should be taken into consideration as applying manure increases soil organic carbon sequestration.

show abstract

Section: 1002/2014gb004871mentioning

confidence: 99%