Urea hydrolysis and lateral and vertical movement in the soil: effects of urease inhibitor and irrigation

Dawar, Khadim; Zaman, Mohammad; Rowarth, J. S.; Blennerhassett, J. D.; Turnbull, Matthew H.

doi:10.1007/s00374-010-0515-3

Cited by 87 publications

(75 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Urea + Cu + B (6.8% applied N) and urea coated with polymers (5.6% applied N) resulted in maximum volatilization on the 3 rd day after fertilization, while urea + NBPT (7% applied N) had the longest delay in the ammonia volatilization peak on the 4 th day (Figure 3). Field research considering different soils and climatic conditions and controlled environments indicated a longer delay and a reduction in the peak volatilization of urea stabilized with NBPT or with Cu and B when applied in various crops (Cantarella et al, 2008;Dawar et al, 2011;Faria et al, 2013;Fontoura;Bayer, 2010;Grohs et al, 2011;Nascimento et al, 2013;Stafanato et al, 2013;Zaman et al, 2009). Soares et al (2012) evaluated NH 3 -N losses in a controlled environment and reported a volatilization peak at between 7 to 9 days for urea + NBPT.…”

Section: Nitrogen Loss By Ammonia Volatilizationmentioning

confidence: 99%

See 1 more Smart Citation

Ammonia volatilization from enhanced-efficiency urea on no-till maize in brazilian cerrado with improved soil fertility

et al. 2016

View full text Add to dashboard Cite

High nitrogen losses by ammonia volatilization are expected when urea is used as the source of N. The use of controlled-release urea and urease inhibitors are possible strategies to reduce such losses and increase nitrogen use efficiency. This study aimed to evaluate nitrogen losses by ammonia volatilization from stabilized, slow and controlled release urea and its absorption by maize grown under no-till in an improved Cerrado soil. Four N sources were used: conventional urea, urea + N-(n-butyl) thiophosphoric triamide (NBPT), urea + Cu and B and urea coated by sulfur + polymers. These N sources were surface applied along the rows using three N doses of 100, 150 and 200 kg ha -1 . No N was added to the control. Data were collected regarding N losses by volatilization, the N contents accumulated in the stubble and grains, and the yields of the stubble and grains. Stabilized urea and slow release urea were efficient for postponing the ammonia volatilization peaks. The urease inhibitors postponed the peaks for up to two days, reducing the accumulated volatilization by 18% when compared with common urea. Polymer sulfur coated urea resulted in a 37% reduction in ammonia volatilization. Increasing the N application rate to 200 kg ha -1 resulted in 16% greater yields and 37% greater N accumulation in the plants relative to the control. However, the stabilized and slow-release urea did not improve the N accumulation or yield. Consequently, the nitrogen use efficiency of maize was not improved relative to the use of conventional urea.Index terms: Nitrogen fertilizers; NH 3 -N losses; polymer sulfur coated urea; urease inhibitors; Zea mays L. RESUMOA aplicação de ureia, frequentemente, gera grandes perdas de N por volatilização e o uso de revestimentos e inibidores de urease, podem reduzir essas perdas. Neste estudo, objetivou-se avaliar as perdas de nitrogênio pela ureia estabilizada e de liberação lenta ou controlada e sua absorção pelo milho cultivado em plantio direto, em solo de Cerrado, com fertilidade construída. Quatro fontes de N foram utilizadas: ureia convencional, ureia + N-(n-butyl)thiophosphoric triamide (NBPT), ureia + Cu + B e ureia revestida por enxofre e polímeros. Essas fontes de N foram aplicadas em superfície nas doses de 100, 150 e 200 kg ha -1 . Não houve aplicação de N no controle. Avaliaram-se as perdas de N por volatilização, o acúmulo de N nos grãos e palhada e produção de grãos e de palhada. A ureia estabilizada e de liberação controlada foi eficiente em atrasar os picos de volatilização de amônia. Os inibidores de urease atrasaram os picos de volatilização em até dois dias, reduzindo a volatilização acumulada em até 18%, quando comparado à ureia comum. A ureia revestida por enxofre e polímeros resultou em uma redução de 37% na volatilização de amônia. O aumento da dose de N até 200 kg ha -1 resultou em aumento de 16% na produtividade e 37% no acúmulo de N em relação ao controle. Entretanto, a ureia estabilizada e de liberação controlada não aumentou o acúmulo de N ou a produtividade...

show abstract

Section: Nitrogen Loss By Ammonia Volatilizationmentioning

confidence: 99%

“…The relative efficiency of NBPT for stabilizing the soil urea could be directly related to soil moisture content (Dawar et al, 2011), temperature and the amount of rainfall after fertilization. These are some of the main factors that regulate volatilization potential in cultivated soils.…”

Section: On Thementioning

confidence: 99%

Ammonia volatilization from enhanced-efficiency urea on no-till maize in brazilian cerrado with improved soil fertility

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Once urea is hydrolyzed deeply in soil, the NH3 formed is protected from volatilization by interaction with soil acidity, forming NH4 + which is retained in soil CEC, and by the nitrification process that quickly takes place of ammonification (CHRISTIANSON et al, 1993;BAERT, 1996;DAWAR et al, 2011a). Since NBPT delays rather than eliminates urea hydrolysis, its effectiveness in reducing volatilization will depend on many factors that intensify the hydrolyze and diffusion of urea in the soil (CHRISTIANSON et al, 1993).…”

Section: Urease Inhibitor Nbptmentioning

confidence: 99%

“…NBPT can inhibit urea hydrolysis for periods from 7 to 14 days depending on soil attributes such as pH, initial moisture, temperature, and other environmental conditions DOUGLASS, 1993;SANZ-COBENA et al, 2008;DAWAR et al, 2011a). …”

Section: Urease Inhibitor Nbptmentioning

confidence: 99%

“…However, in most cases the NBPT treatment delays the time of the maximum rate of NH3 loss to the seventh or ninth days, while for urea untreated this peak occur around third and fourth day (WATSON et al, 1994b;SANZ-COBENA et al, 2008;DAWAR et al, 2011a;SOARES;MENEGALE, 2012). The inhibition period of NBPT applied under Brazilian conditions is still not clear, specifically following application over large amount of crop residues such as in GCTB systems.…”

Section: Urease Inhibitor Nbptmentioning

confidence: 99%

See 1 more Smart Citation

Increasing NBPT rates to reduce ammonia volatilization losses from urea applied over sugarcane straw

Mira¹

View full text Add to dashboard Cite

Impacts and management strategies for crop production in waterlogged or flooded soils: A review

et al. 2020

View full text Add to dashboard Cite

Globally, flooding is one of the most damaging abiotic stresses, besides drought, that affects 17 million km 2 of land surface annually. Recent research indicates that climate change is resulting in more extreme weather events, such as flooding or soil waterlogging, that negatively affect crop production. Therefore, it is imperative to understand how flooding stress affects crops and to develop improved production practices that make cropping systems more resilient and able to cope with extreme weather events. This review paper summarizes the current state of knowledge on the impacts of flooding or soil waterlogging on crop production losses, nitrogen (N) losses, and provides potential management strategies to reduce these losses. The factors affecting the extent of flooding injury in plants as well as plant adaptations under waterlogging stress are also discussed briefly. For the purpose of this review, "flooding" refers to the situation when all or part of the plant is submerged under water, whereas "soil waterlogging" refers to the situation where soil pores are saturated with water. Soil waterlogging also promotes soil N losses through runoff, leaching, and denitrification. Potential management practices that can be used to mitigate soil waterlogging stress include the use of flood-tolerant varieties, adjusting management practices, improving drainage, and practicing adaptive nutrient management strategies. However, these might be site-or crop-specific management practices and they should be validated for their economic viability before developing future management plans that promote sustainable crop yields from waterlogged soils.Abbreviations: BMP, Best Management Practice; CDSI, controlled drainage and subirrigation; EEF, enhanced efficiency fertilizer; ET, evapotranspiration; Fv/Fm, ratio of variable fluorescence to material fluorescence; GIS, Geographic Information System; NBPT, N-(n-butyl) thiophosphoric triamide; NI, nitrification inhibitor; NUE, nitrogen use efficiency; PCU, polymer-coated urea; UI, urease inhibitors.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

show abstract

Urea hydrolysis and lateral and vertical movement in the soil: effects of urease inhibitor and irrigation

Cited by 87 publications

References 29 publications

Ammonia volatilization from enhanced-efficiency urea on no-till maize in brazilian cerrado with improved soil fertility

Ammonia volatilization from enhanced-efficiency urea on no-till maize in brazilian cerrado with improved soil fertility

Increasing NBPT rates to reduce ammonia volatilization losses from urea applied over sugarcane straw

Impacts and management strategies for crop production in waterlogged or flooded soils: A review

Contact Info

Product

Resources

About