Influence of nitrification inhibitors on nitrification and nitrous oxide (N2O) emission from a clay loam soil fertilized with urea

Chen, Deli; Suter, Helen; Islam, A.; Edis, Robert

doi:10.1016/j.soilbio.2009.12.014

Cited by 136 publications

(70 citation statements)

References 22 publications

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“…Overall, DMPP reduced the amount of N 2 O losses by >60% in both the Vertisol and Oxisol, a result consistent with the 40-60% abatement rates reported in field trials and incubation studies (De Antoni Migliorati et al 2014;Chen et al 2010;Suter et al 2010;Liu et al 2013). The efficiency of DMPP in inhibiting N 2 O losses was reflected at both sites by the emission factors and emission intensities, which on average were reduced by 70% compared with conventional urea (Table 3).…”

Section: Effects Of Dmpp On N 2 O Emissions and Grain Yieldssupporting

confidence: 82%

Comparison of grain yields and N2O emissions on Oxisol and Vertisol soils in response to fertiliser N applied as urea or urea coated with the nitrification inhibitor 3,4-dimethylpyrazole phosphate

Migliorati

Bell

Lester³

et al. 2016

Soil Res.

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Abstract. The potential for elevated nitrous oxide (N 2 O) losses is high in subtropical cereal cropping systems in northeast Australia, where the fertiliser nitrogen (N) input is one single application at or before planting. The use of urea coated with the nitrification inhibitor 3,4-dimethylpyrazole phosphate (DMPP) has been reported to substantially decrease N 2 O emissions and increase crop yields in humid, high-intensity rainfall environments. However, it is still uncertain whether this product is similarly effective in contrasting soil types in the cropping region of north-east Australia. In this study the grain yield response of sorghum (Sorghum bicolor L. Moench) to rates of fertiliser N applied as urea or urea coated with DMPP were compared in crops grown on a Vertisol and an Oxisol in southern Queensland. Seasonal N 2 O emissions were monitored on selected treatments for the duration of the cropping season and the early stages of a subsequent fallow period using a fully automated high-frequency greenhouse gas measuring system. On each soil the tested treatments included an unfertilised control (0 kg N ha -1 ) and two fertilised treatments chosen on the basis of delivering at least 90% of seasonal potential grain yield (160 and 120 kg N ha -1 on the Vertisol and Oxisol respectively) or at a common (suboptimal) rate at each site (80 kg N ha -1 ). During this study DMPP had a similar impact at both sites, clearly inhibiting nitrification for up to 8 weeks after fertiliser application. Despite the relatively dry seasonal conditions during most of the monitoring period, DMPP was effective in abating N 2 O emissions on both soils and on average reduced seasonal N 2 O emissions by 60% compared with conventional urea at fertiliser N rates equivalent to those producing 90% of site maximum grain yield. The significant abatement of N 2 O emissions observed with DMPP, however, did not translate into significant yield gains or improvements in agronomic efficiencies of fertiliser N use. These results may be due to the relatively dry growing season conditions before the bulk of crop N acquisition, which limited the exposure of fertiliser N to large losses due to leaching and denitrification.

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Section: Effects Of Dmpp On N 2 O Emissions and Grain Yieldssupporting

confidence: 82%

Comparison of grain yields and N2O emissions on Oxisol and Vertisol soils in response to fertiliser N applied as urea or urea coated with the nitrification inhibitor 3,4-dimethylpyrazole phosphate

Migliorati

Bell

Lester³

et al. 2016

Soil Res.

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“…All studies showed that this treatment significantly reduced nitrate production from fertiliser and consequently reduced seasonal N 2 O emissions by 38-75% compared with standard urea, with deviations in effectiveness linked to soil moisture and temperature conditions (Chen et al 2010;Menéndez et al 2012). In our study, DMPP-coated urea reduced cumulative N 2 O emissions in Expts 4 and 5 by 65-75% compared with standard urea when both were applied at the same N rate at sowing.…”

Section: N 2 O Mitigation Options For Rainfed Cereal Croppingsupporting

confidence: 48%

Greenhouse gas (N2O and CH4) fluxes under nitrogen-fertilised dryland wheat and barley on subtropical Vertosols: risk, rainfall and alternatives

et al. 2016

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Abstract. The northern Australian grains industry relies on nitrogen (N) fertiliser to optimise yield and protein, but N fertiliser can increase soil fluxes of nitrous oxide (N 2 O) and methane (CH 4 ). We measured soil N 2 O and CH 4 fluxes associated with wheat (Triticum aestivum) and barley (Hordeum vulgare) using automated (Expts 1, 3) and manual chambers (Expts 2, 4, 5). Experiments were conducted on subtropical Vertosol soils fertilised with N rates of 0-160 kg N ha -1 .In Expt 1 (2010), intense rainfall for a month before and after sowing elevated N 2 O emissions from N-fertilised (80 kg N ha -1 ) wheat, with 417 g N 2 O-N ha -1 emitted compared with 80 g N 2 O-N ha -1 for non-fertilised wheat. Once crop N uptake reduced soil mineral N, there was no further treatment difference in N 2 O. Expt 2 (2010) showed similar results, however, the reduced sampling frequency using manual chambers gave a lower cumulative N 2 O. By contrast, very low rainfall before and for several months after sowing Expt 3 (2011) resulted in no difference in N 2 O emissions between N-fertilised and non-fertilised barley. N 2 O emission factors were 0.42, 0.20 and -0.02 for Expts 1, 2 and 3, respectively. In Expts 4 and 5 (2011), N 2 O emissions increased with increasing rate of N fertiliser. Emissions were reduced by 45% when the N fertiliser was applied in a 50 : 50 split between sowing and mid-tillering, or by 70% when urea was applied with the nitrification inhibitor 3,4-dimethylpyrazole-phosphate.Methane fluxes were typically small and mostly negative in all experiments, especially in dry soils. Cumulative CH 4 uptake ranged from 242 to 435 g CH 4 -C ha -1 year -1 , with no effect of N fertiliser treatment. Considered in terms of CO 2 equivalents, soil CH 4 uptake offset 8-56% of soil N 2 O emissions, with larger offsets occurring in non-N-fertilised soils.The first few months from N fertiliser application to the period of rapid crop N uptake pose the main risk for N 2 O losses from rainfed cereal cropping on subtropical Vertosols, but the realisation of this risk is dependent on rainfall. Strategies that reduce the soil mineral N pool during this time can reduce the risk of N 2 O loss.

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“…In our study, the incubation temperature was 30°C, so we concluded that biological decomposition of DCD might be one of the reasons for the lower inhibitory effect compared to C 2 H 2 . Additionally, several studies suggested that soil texture, water content, temperature, and pH might be the key factors influencing the effectiveness of NIs on nitrification and nitrification-related N 2 O emission (Hatch et al 2005;Chen et al 2010;Di and Cameron 2011;Cui et al 2013;Liu et al 2015). Further research is required to improve our understanding of the inhibitory effects of DCD and C 2 H 2 under different soil conditions.…”

Section: Discussionmentioning

confidence: 99%

Effects of dicyandiamide and acetylene on N2O emissions and ammonia oxidizers in a fluvo-aquic soil applied with urea

Wang

Zhang

Shen

et al. 2016

Environ Sci Pollut Res

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Ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) are crucial for N 2 O emission as they carry out the key step of nitrification. Dicyandiamide (DCD) and acetylene (C 2 H 2 ) are typical nitrification inhibitors (NIs), while the comparative effects of these NIs on N 2 O production and ammonia oxidizers' (AOB and AOA) growth are unclear. Four treatments including a control, urea, urea + DCD, and urea + C 2 H 2 were set up to investigate their effect of inhibiting soil nitrification, nitrification-related N 2 O emission as well as the growth of ammonia oxidizers with a fluvo-aquic soil using microcosms for 28 days. N 2 O emission and net nitrification rate increased after the application of urea, but were significantly restrained in urea + NI treatments, while C 2 H 2 was more effective in reducing N 2 O emission and nitrification rate than DCD. The abundance of AOB, which was significantly correlated with N 2 O emission and net nitrification rate, was more inhibited by C 2 H 2 than DCD. Furthermore, the application of urea in all the soils had little impact on the AOA community, while obvious shifts of AOB community structure were found compared with the control. All AOB sequences fell within Nitrosospira cluster 3, and the AOA community was clustered to group 1.1b. Collectively, it indicated that application of urea combined with NIs (DCD or C 2 H 2 ) could potentially alter N 2 O emission, mainly through regulating the growth of AOB but not AOA in this fluvo-aquic soil.

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Influence of nitrification inhibitors on nitrification and nitrous oxide (N2O) emission from a clay loam soil fertilized with urea

Cited by 136 publications

References 22 publications

Comparison of grain yields and N2O emissions on Oxisol and Vertisol soils in response to fertiliser N applied as urea or urea coated with the nitrification inhibitor 3,4-dimethylpyrazole phosphate

Comparison of grain yields and N2O emissions on Oxisol and Vertisol soils in response to fertiliser N applied as urea or urea coated with the nitrification inhibitor 3,4-dimethylpyrazole phosphate

Greenhouse gas (N2O and CH4) fluxes under nitrogen-fertilised dryland wheat and barley on subtropical Vertosols: risk, rainfall and alternatives

Effects of dicyandiamide and acetylene on N2O emissions and ammonia oxidizers in a fluvo-aquic soil applied with urea

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