Ammonia Volatilization from Urea and Mitigation by NBPT following Surface Application to Cold Soils

Engel, R. E.; Jones, Clain; Wallander, Roseann T.

doi:10.2136/sssaj2011.0229

Cited by 106 publications

(84 citation statements)

References 27 publications

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“…These results corroborate those reported by Engel, Jones and Wallander (2011), who found greater losses of N-NH 3 (30 to 44% of N applied) when urea was applied to the soil surface with a high moisture content followed by a slow drying period, with either little or no rainfall. Thus, the greatest loss of N-NH 3 occurs when the soil surface is drying, that is, the evaporation rate is more important than the initial moisture condition Trivelin;Boaretto, 1992).…”

Section: Resultssupporting

confidence: 91%

Ammonia volatilization from blends with stabilized and controlled-released urea in the coffee system

et al. 2016

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Application of stabilized and controlled-release urea blends can reduce the losses of N-NH 3 as compared to conventional urea. The aim of this study was to quantify ammonia volatilization from conventional nitrogen fertilizers and blends of urea + (urea + NBPT) + controlled release urea applied in drip irrigated coffee system. The experiment was conducted under field conditions in in a Red Latosol located in Lavras-MG, Brazil. The randomized complete block design with six treatments: Urea = 450 kg ha

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Section: Resultssupporting

confidence: 91%

Ammonia volatilization from blends with stabilized and controlled-released urea in the coffee system

et al. 2016

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“…The TN amount in the root biomass was set equal to 20% of the aboveground N, based on wheat root N:shoot N ratios (Andersson et al 2005). Broadcast urea volatilization amounts were estimated at 14% of applied N based on measured average ammonia volatilization losses from early spring (Mar 24-Apr 20) applications for eight central and north central Montana trials, including three within the JRW (Engel et al 2011;Engel and Jones 2014). For both years, it was assumed that seed placed starter and CRU fertilizer did not volatilize, and that 7% of liquid UAN volatilized based on a Manitoba, Canada study conducted in late May (Grant et al 1996).…”

Section: N Balance Methods To Calculate Nitrate Leachingmentioning

confidence: 99%

Fallow replacement and alternative nitrogen management for reducing nitrate leaching in a semiarid region

John

Jones

Ewing

et al. 2017

Nutr Cycl Agroecosyst

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Nitrate (NO 3 -) leaching into groundwater is a growing global concern for health, environmental, and economic reasons, yet little is known about the effects of agricultural management practices on the magnitude of leaching, especially in dryland semiarid regions. Groundwater nitrate-nitrogen (nitrate-N) concentrations above the drinking water standard of 10 mg L -1 are common in the Judith River Watershed (JRW) of semiarid central Montana. A 2-year study conducted on commercial farms in the JRW compared nitrate leaching rates across three alternative management practices (AMP: pea, controlled release urea, split application of N) and three grower standard practices (GSP: summer fallow, conventional urea, single application of urea). Crop biomass and soil were collected at ten sampling locations on each side of a management interface separating each AMP from its corresponding GSP. A nitrogen (N) mass balance approach was used to estimate the amount of nitrate leached annually. In 2013, less nitrate leached the year after the pea AMP (18 ± 2.5 kg N ha -1 ) than the year after the fallow GSP (54 ± 3.6 kg N ha -1 ), whereas the two AMP fertilizer treatments had no effect on nitrate leaching compared to GSPs. In 2014, leaching rates did not differ between each AMP and its corresponding GSP. The results suggest that replacing fallow with pea has the greatest potential to reduce nitrate leaching. Future leaching research should likely focus on practices that decrease deep percolation, such as fallow replacement with annual or perennial crops, more than on N fertilizer practices.

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“…Another important factor is that NBPT is sensitive to high temperature and humidity (Engel;Jones;Wallander, 2013). Typically, this compound is mixed with solvents, such as glycols or derivatives, and is subsequently homogeneously distributed to urea (Sutton;Thornsberry, 2013;Whitehurst;Whitehurst, 2014).…”

Section: Daily and Cumulative N-nh 3 Lossesmentioning

confidence: 99%

Ammonia and carbon dioxide emissions by stabilized conventional nitrogen fertilizers and controlled release in corn crop

et al. 2017

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The market of stabilized, slow and controlled release nitrogen (N) fertilizers represents 1% of the world fertilizer consumption. On the other hand, the increase in availability, innovation and application of these technologies could lead to the improvement of N use efficiency in agroecossystems and to the reduction of environmental impacts. The objective of this study was to quantify agronomic efficiency relative index, ammonia volatilization, and CO 2 emissions from conventional, stabilized and controlled release N fertilizers in corn summer crop. The experiment was carried out in a corn crop area located in Lavras, state of Minas Gerais, Brazil, without irrigation. All treatments were applied in topdressing at rate of 150 kg ha -1 N. N-NH 3 losses from N fertilizers were: Granular urea (39% of the applied N ) = prilled urea (38%) > urea coated with 16% S 0 (32%) = blend of urea + 7.9% S 0 + polymers + conventional urea (32%) > prilled urea incorporated at 0.02 m depth (24%) > urea + 530 mg kg -1 of NBPT (8%) = Hydrolyzed leather (9%) > urea + thermoplastic resin (3%) = ammonium sulfate (1%) = ammonium nitrate (0.7%). Thermoplastic resin coated urea, ammonium nitrate and ammonium sulfate presented low values of cumulative CO 2 emissions in corn crop. On the other hand, hydrolyzed leather promoted greater C-CO 2 emission, when compared with other nitrogen fertilizers.Index terms: CO 2 ; NH 3 loss; no-tillage; Zea mays L. RESUMOO consumo de fertilizantes nitrogenados estabilizados, de liberação lenta e controlada representa 1% do total de fertilizantes utilizados no mundo. Por outro lado, um aumento na disponibilidade, inovação e utilização dessas tecnologias pode levar a maior eficiência no uso do nitrogênio (N) na agricultura com menor impacto ambiental. O objetivo deste trabalho foi quantificar as perdas de amônia (N-NH 3 ) por volatilização e as emissões de CO 2 de fertilizantes nitrogenados convencionais, estabilizados e de liberação controlada na cultura do milho. O experimento foi realizado em condições de campo no município de Lavras (MG) no ano agrícola 2013/2014, sem irrigação. Os tratamentos foram compostos por fertilizantes nitrogenados aplicadas em cobertura na dose de 150 kg ha -1 de N. A perda acumulada de N-NH 3 dos fertilizantes nitrogenados convencionais, estabilizados de liberação controlada em ordem decrescente foi: Ureia granulada (39% do N aplicado) = ureia perolada (38%) > ureia + 16% de S 0 (32%) = mistura física de grânulos (blend) de ureia revestida com S 0 e polímeros e ureia convencional (32%) > ureia perolada incorporada (24%) > ureia + 530 mg kg -1 de NBPT (8%) = hidrolisado de couro bovino (9%) > ureia + resina termoplástica (3%) = sulfato de amônio (1%) = nitrato de amônio (0,7%). O sulfato e nitrato de amônio e a ureia + resina termoplástica promovem a menor emissão de dióxido de carbono (C-CO 2 ) em área de cultivo de milho. Enquanto que, o hidrolisado de couro promoveu a maior emissão total de C-CO 2 para à atmosfera.Termos para indexação: CO 2 ; perdas de NH 3 ; planti...

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Ammonia Volatilization from Urea and Mitigation by NBPT following Surface Application to Cold Soils

Cited by 106 publications

References 27 publications

Ammonia volatilization from blends with stabilized and controlled-released urea in the coffee system

Ammonia volatilization from blends with stabilized and controlled-released urea in the coffee system

Fallow replacement and alternative nitrogen management for reducing nitrate leaching in a semiarid region

Ammonia and carbon dioxide emissions by stabilized conventional nitrogen fertilizers and controlled release in corn crop

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