Assessing the impacts of tillage, cover crops, nitrification, and urease inhibitors on nitrous oxide emissions over winter and early spring

Ekwunife, Kosoluchukwu C.; Madramootoo, Chandra A.; Abbasi, Naeem Akhtar

doi:10.1007/s00374-021-01605-w

Cited by 13 publications

(7 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the data set did not include studies in tropical areas. Overall, our data set demonstrated NIs to be as effective in tropical zones as they are in subtropical zones, with similar results to previously published meta-analyses that did not consider or underrepresented tropical areas (Abalos et al 2014;Ekwunife et al 2022;Gilsanz et al 2016;Thapa et al 2016;Yang et al 2016).…”

Section: Effect Of Climate Zonesupporting

confidence: 89%

See 1 more Smart Citation

Do tropical climatic conditions reduce the effectiveness of nitrification inhibitors? A meta-analysis of studies carried out in Brazil

Ribeiro

Carlos

Barth

et al. 2023

Nutr Cycl Agroecosyst

View full text Add to dashboard Cite

Extensive research has been performed into the effectiveness of nitrification inhibitors (NIs) in preventing N losses; however, tropical agriculture has been underrepresented in recent meta-analyses. Here, we apply a meta-analytic approach using data from 50 articles to identify the impact of NIs (DMPP, DCD, and DCD + NBPT) on crop yield, N2O emissions, soil NH4+ and NO3− concentrations, and NH3 volatilization in subtropical and tropical regions of Brazil. In addition, the survey includes information about location; climate zone; cultivated crops; soil pH; soil organic carbon; soil texture; experimental method; soil management; irrigation; fertilizer source, rate, and type; and NI type and rate. Overall, the data set showed that NIs increased crop yield and soil NH4+ concentrations by 3 and 60%, respectively, whereas N2O emissions and soil NO3− concentrations were reduced by 62 and 31%, respectively. Ammonia volatilization was not changed by NI application. However, the combination of a NI with a urease inhibitor decreased such losses by 39%. The effectiveness of the NIs was highest in irrigated fields, fine-textured soils, and mineral N sources. Moreover, NI performance in Brazil was found to be similar in tropical and subtropical climates, and was also comparable to values previously reported in meta-analyses, including those conducted in temperate climates. Therefore, NI application is indicated to be an efficient strategy to delay nitrification and mitigate N2O emissions in tropical agroecosystems.

show abstract

Section: Effect Of Climate Zonesupporting

confidence: 89%

“…Enhanced drainage is also a factor that may promote NIs persistence and effectiveness in soil. On the other hand, no-till management can increase soil moisture content and bulk density, which favor anaerobic conditions and N 2 O emissions (Ekwunife et al 2022).…”

Section: Effect Of Soil Tillage and Experimental Methodsmentioning

confidence: 99%

Do tropical climatic conditions reduce the effectiveness of nitrification inhibitors? A meta-analysis of studies carried out in Brazil

Ribeiro

Carlos

Barth

et al. 2023

Nutr Cycl Agroecosyst

View full text Add to dashboard Cite

show abstract

“…For example, through meta‐analysis, Ekwunife et al. (2021) found that N 2 O emission can be higher in dry climate areas compared with humid areas. Maag and Vinther (1996) found that N 2 O emissions can be higher from coarse sandy soils compared with sandy loam soils.…”

Section: Introductionmentioning

confidence: 99%

“…However, high rates of N fertilizers are known to increase N 2 O emissions, with the emissions being influenced by soil type as well as climate (Barton et al, 2008). For example, through meta-analysis, Ekwunife et al (2021) found that N 2 O emission can be higher in dry climate areas compared with humid areas. Maag and Vinther (1996) found that N 2 O emissions can be higher from coarse sandy soils compared with sandy loam soils.…”

mentioning

confidence: 99%

Soil nutrients and plant uptake parameters as related to greenhouse gas emissions

2022

View full text Add to dashboard Cite

Fertilizer and water management practices have short-and long-term effects on soil chemical and physical properties and, in turn, greenhouse gas (GHG) emissions. The goal of this 4-yr field study was to establish the relationships between soil properties, agronomic practices, and GHG (CO 2 and N 2 O) emissions under different fertilizer and water table management practices. There were two fertilizer treatments: inorganic fertilizer (IF) and a mix of solid cattle manure and inorganic fertilizer (SCM), combined with tile drainage(DR) and controlled drainage with subirrigation(CDS). The cropping system was a maize (Zea mays L.)-soybean [Glycine max (L.) Merr.] rotation. Nitrogen in biomass (BMN) and N in grain (GRN) were measured and used to calculate other plant N parameters. Nitrous oxide and CO 2 fluxes were collected weekly, and their respective cumulative emissions were calculated. The results show that soil organic matter (OM), soil total carbon (C), and soil total nitrogen (N) were greater in SCM than IF by 23.7, 35.2, and 24.4%, respectively. Water table management did not significantly affect soil N and C. Increased CO 2 emissions were witnessed under higher soil OM, soil total C, and total N. Plant N uptake parameters were negatively correlated with N 2 O and CO 2 emissions. Higher plant N uptake can reduce environmental pollution by limiting N 2 O and CO 2 emissions. INTRODUCTIONAgriculture is responsible for 10% of the total greenhouse gas (GHG) emissions in Canada (ECCC, 2020). The use of fertilizer for crop production has increased from 57.6 ( 2002) to 87.6 (2016) kg ha −1 in Canada (World Data Atlas, 2020). Greenhouse gas emissions from agricultural soils have also increased with fertilizer use (Rochette et al., 2008), contributing to climate change.

show abstract

“…Thus, a more detailed measurement and description of soil conditions including soil temperature and moisture at the time there is greatest NH 3 or N 2 O loss should be implemented in future inhibitor studies. Additionally, the effect of weather condition near the time of N application (e.g., rainfall), extreme weather events (e.g., flood and drought) and typical soil climate (e.g., wet‐dry and freeze‐thaw cycle) on the inhibitor impacts on crop yields and N loss have been rarely reported but is worth further investigation (Ekwunife et al, 2021; Guzman‐Bustamante et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Global evaluation of inhibitor impacts on ammonia and nitrous oxide emissions from agricultural soils: A meta‐analysis

Fan

Smith

et al. 2022

Global Change Biology

View full text Add to dashboard Cite

Inhibitors are widely considered an efficient tool for reducing nitrogen (N) loss and improving N use efficiency, but their effectiveness is highly variable across agroecosystems. In this study, we synthesized 182 studies (222 sites) worldwide to evaluate the impacts of inhibitors (urease inhibitors [UI], nitrification inhibitors [NI] and combined inhibitors) on crop yields and gaseous N loss (ammonia [NH3] and nitrous oxide [N2O] emissions) and explored their responses to different management and environmental factors including inhibitor application timing, fertilization regime, cropping system, water management, soil properties and climatic conditions using subgroup meta‐analysis, meta‐regression and multivariate analyses. The UI were most effective in enhancing crop yields (by 5%) and reducing NH3 volatilization (by 51%), whereas NI were most effective at reducing N2O emissions (by 49%). The application of UI mitigates NH3 loss and increases crop yields especially in high NH3‐N loss scenarios, whereas NI application would minimize the net N2O emissions and the resultant environmental impacts especially in low NH3‐N loss scenarios. Alternatively, the combined application of UI and NI enables producers to balance crop production and environmental conservation goals without pollution tradeoffs. The inhibitor efficacy for decreasing gaseous N loss was dependent upon soil and climatic conditions and management practices. Notably, both meta‐regression and multivariate analyses suggest that inhibitors provide a greater opportunity for reducing fertilizer N inputs in high‐N‐surplus systems and presumably favor crop yield enhancement under soil N deficiency situations. The pursuit of an improved understanding of the interactions between plant‐soil‐climate‐management systems and different types of inhibitors should continue to optimize the effectiveness of inhibitors for reducing environmental losses while increasing productivity.

show abstract

Assessing the impacts of tillage, cover crops, nitrification, and urease inhibitors on nitrous oxide emissions over winter and early spring

Cited by 13 publications

References 83 publications

Do tropical climatic conditions reduce the effectiveness of nitrification inhibitors? A meta-analysis of studies carried out in Brazil

Do tropical climatic conditions reduce the effectiveness of nitrification inhibitors? A meta-analysis of studies carried out in Brazil

Soil nutrients and plant uptake parameters as related to greenhouse gas emissions

Global evaluation of inhibitor impacts on ammonia and nitrous oxide emissions from agricultural soils: A meta‐analysis

Contact Info

Product

Resources

About