Management and implications of using nitrification inhibitors to reduce nitrous oxide emissions from urine patches on grazed pasture soils – A review

Adhikari, Kamal P.; Chibuike, Grace; Saggar, Surinder; Simon, Priscila Luzia; Luo, Junyu; Klein, Cecile A. M. de

doi:10.1016/j.scitotenv.2021.148099

Cited by 19 publications

(9 citation statements)

References 114 publications

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“…The SOC and soil pH did not show a consistent influence on NIs effect. Higher SOC contents may stimulate the biodegradability of NIs through the higher microbial activity (Adhikari et al 2021), although this effect was not verified in our study. The NI efficiency in high-pH soils might be reduced because of enhanced N losses from NH 3 volatilization (Thapa et al 2016;Wu et al 2021).…”

Section: Effect Of Soc and Phcontrasting

confidence: 75%

“…4). Conversely, Adhikari et al (2021) reported no relation between DCD rate and reduction in N 2 O release from N-urine patches. However, Gilsanz et al (2016) found that higher NI rates decreased the emission factor from NI-treated fertilizers.…”

Section: Effect Of N Sourcementioning

confidence: 96%

“…Nevertheless, in warmer climates with available water for cropping throughout rainfall or irrigation, reduced DCD rates are likely to lead to a null effect. This may be particularly true for DCD because of its higher mobility compared with DMPP (Adhikari et al 2021;Byrne et al 2020).…”

Section: Effect Of N Sourcementioning

confidence: 99%

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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

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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.

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Section: Effect Of Soc and Phcontrasting

confidence: 75%

Section: Effect Of N Sourcementioning

confidence: 96%

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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

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“…According to Adhikari et al (2021) in intensively managed dairy pastures, urine deposited by cattle during grazing covers relatively small proportion of the total grazed area. Maire et al (2018) reported that urine patches represent only about 6-12% of the grazed area in a single dairy cow grazing event.…”

Section: Application Of Nitrification and Urease Inhibitorsmentioning

confidence: 99%

“…Approaches to identifying urine patches include visually monitoring cows in the field, automated monitoring using electromagnetic induction, electrical conductivity measurements and optical sensing (Misselbrook et al, 2016), ground-based sensing and airborne technologies, such as remotely piloted areal systems (RPAS), LiDAR and satellites using hyperspectral and near infra-red imaging, and temperature sensors (Dennis et al, 2013). The application rates for DCD, DMPP and nitrapyrin in previous field experiments involving urine ranged from 5 to 80, 1 to 5, and 1 to 10 kg/ha, respectively (Adhikari et al, 2021).…”

Section: Application Of Nitrification and Urease Inhibitorsmentioning

confidence: 99%

CH4 and N2O Emissions From Cattle Excreta: A Review of Main Drivers and Mitigation Strategies in Grazing Systems

Rivera

Chará

2021

Front. Sustain. Food Syst.

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Cattle production systems are an important source of greenhouse gases (GHG) emitted to the atmosphere. Animal manure and managed soils are the most important sources of emissions from livestock after enteric methane. It is estimated that the N2O and CH4 produced in grasslands and manure management systems can contribute up to 25% of the emissions generated at the farm level, and therefore it is important to identify strategies to reduce the fluxes of these gases, especially in grazing systems where mitigation strategies have received less attention. This review describes the main factors that affect the emission of GHG from manure in bovine systems and the main strategies for their mitigation with emphasis on grazing production systems. The emissions of N2O and CH4 are highly variable and depend on multiple factors, which makes it difficult to use strategies that mitigate both gases simultaneously. We found that strategies such as the optimization of the diet, the implementation of silvopastoral systems and other practices with the capacity to improve soil quality and cover, and the use of nitrogen fixing plants are among the practices with more potential to reduce emissions from manure and at the same time contribute to increase carbon capture and improve food production. These strategies can be implemented to reduce the emissions of both gases and, depending on the method used and the production system, the reductions can reach up to 50% of CH4 or N2O emissions from manure according to different studies. However, many research gaps should be addressed in order to obtain such reductions at a larger scale.

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Mitigation of nitrous oxide emissions in grazing systems through nitrification inhibitors: a meta-analysis

Soares

Souza

Mazzetto

et al. 2023

Nutr Cycl Agroecosyst

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Grasslands are the largest contributor of nitrous oxide (N2O) emissions in the agriculture sector due to livestock excreta and nitrogen fertilizers applied to the soil. Nitrification inhibitors (NIs) added to N input have reduced N2O emissions, but can show a range of efficiencies depending on climate, soil, and management conditions. A meta-analysis study was conducted to investigate the factors that influence the efficiency of NIs added to fertilizer and excreta in reducing N2O emissions, focused on grazing systems. Data from peer-reviewed studies comprising 2164 N2O emission factors (EFs) of N inputs with and without NIs addition were compared. The N2O EFs varied according to N source (0.0001–8.25%). Overall, NIs reduced the N2O EF from N addition by 56.6% (51.1–61.5%), with no difference between NI types (Dicyandiamide—DCD; 3,4-Dimethylpyrazole phosphate—DMPP; and Nitrapyrin) or N source (urine, dung, slurry, and fertilizer). The NIs were more efficient in situations of high N2O emissions compared with low; the reduction was 66.0% when EF > 1.5% of N applied compared with 51.9% when EF ≤ 0.5%. DCD was more efficient when applied at rates > 10 kg ha−1. NIs were less efficient in urine with lower N content (≤ 7 g kg−1). NI efficiency was negatively correlated with soil bulk density, and positively correlated with soil moisture and temperature. Better understanding and management of NIs can optimize N2O mitigation in grazing systems, e.g., by mapping N2O risk and applying NI at variable rate, contributing to improved livestock sustainability.

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Management and implications of using nitrification inhibitors to reduce nitrous oxide emissions from urine patches on grazed pasture soils – A review

Cited by 19 publications

References 114 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

CH4 and N2O Emissions From Cattle Excreta: A Review of Main Drivers and Mitigation Strategies in Grazing Systems

Mitigation of nitrous oxide emissions in grazing systems through nitrification inhibitors: a meta-analysis

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