Urease inhibitor reduces N losses and improves plant-bioavailability of urea applied in fine particle and granular forms under field conditions

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

doi:10.1016/j.agee.2011.08.007

Cited by 69 publications

(46 citation statements)

References 71 publications

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“…Ureases play an important role in the utilisation of nitrogenous fertiliser and are crucial to the nitrogen cycle (Krajewska, 2009;Dawar et al, 2011;Dong et al, 2008). The indistinctive correction between URE and AP and that of URE and CEL (Table 3) showed that URE activity was not affected by the using straws, but by wastewater irrigation In this study, Zn, Mn and Cr had a significant or nearly significant relationship.…”

Section: Discussionmentioning

confidence: 67%

Spatial variation of soil quality and pollution assessment of heavy metals in cultivated soils of Henan Province, China

Cheng

Guo

Wang

et al. 2014

Chemical Speciation & Bioavailability

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Eight chemical and physical characteristics and seven biological properties of the soils from five cultivated areas in the Henan Province were quantified. Concentrations of Cu, Cr, Zn and Mn were determined using the flame atomic absorption spectrometry. In addition available phosphorus, chloride, soluble salt and pH were measured. The activities of enzymes were determined by a literature method. The results showed that the concentrations of Mn, Zn and Cr had close relationships with that of available phosphorus, and their concentrations increased with the prolonged application of organic and mineral fertilisers and pesticides-fungicides. The activities of cellulase have a relationship to the concentrations of Zn and Mn at 0.95 levels respectively, Zn and Mn stimulate many enzyme activities. The relationship between protease and available phosphorus was nearly distinctive at 0.95 levels, relating with the use of nitrogen fertiliser in the farmlands. Local organic manures and urea fertilisers did not change the soil characteristics to a great extent. However, the soils showed moderate and moderate-to-strong contamination by Mn and Zn in the study areas. Wastewater and groundwater irrigation, pesticidesfungicides, and fertiliser may be responsible for the elevated concentrations of Zn and Mn in the soil samples.

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Section: Discussionmentioning

confidence: 67%

Spatial variation of soil quality and pollution assessment of heavy metals in cultivated soils of Henan Province, China

Cheng

Guo

Wang

et al. 2014

Chemical Speciation & Bioavailability

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“…Other studies have reported decreased N 2 O emissions with urease inhibitors (Dawar et al 2011;Sanz-Cobena et al 2012;Singh et al 2013). From previous work, urease inhibitors can stimulate or decrease denitrification depending on the inhibitor type and concentration used (Yeomans and Bremner 1986;Zhengping et al 1991).…”

Section: N 2 O Emissionsmentioning

confidence: 99%

“…For example, Watson et al (1990) found that NBTPT increased both yield and N efficiency by 11%. Dawar et al (2011) concluded that using a fine particle spray instead of granular urea and addition of NBTPT, both increased biomass production (by 27% and 38%, respectively) and N response efficiency (by 9 and 13 kg DM kg N -1 , respectively) compared with granular urea. This is a much greater response than observed here, which may indicate the importance of season, with Dawar et al (2011) applying the fertiliser in spring.…”

Section: Biomassmentioning

confidence: 99%

“…Dawar et al (2011) concluded that using a fine particle spray instead of granular urea and addition of NBTPT, both increased biomass production (by 27% and 38%, respectively) and N response efficiency (by 9 and 13 kg DM kg N -1 , respectively) compared with granular urea. This is a much greater response than observed here, which may indicate the importance of season, with Dawar et al (2011) applying the fertiliser in spring. The June harvest showed that GU, DMPP and FPA all gave a production benefit when the time since fertilisation was extended, by either providing greater mineral N due to decreased NH 3 loss (GU and FPA) or retaining N in a form less prone to loss (DMPP) (Fig.…”

Section: Biomassmentioning

confidence: 99%

“…Due to the impacts on NH 3 volatilisation, it is expected that N 2 O emissions may increase relative to urea because of greater N in the system, but some studies have reported decreases in N 2 O with the urease inhibitor (Zaman et al 2009;Singh et al 2013;Ding et al 2014). Use of fine particle sprays and suspensions have been shown to decrease NH 3 and N 2 O loss and increase productivity relative to urea when applied with and without urease or nitrification inhibitors (Di and Cameron 2006;Dawar et al 2011). To develop effective strategies to mitigate N 2 O emissions and provide productivity benefits to facilitate adoption of these strategies in Australian pasture systems, greater knowledge of the impact of EEFs under field conditions is required.…”

Section: Introductionmentioning

confidence: 99%

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Influence of enhanced efficiency fertilisation techniques on nitrous oxide emissions and productivity response from urea in a temperate Australian ryegrass pasture

Suter

Sultana

Davies³

et al. 2016

Soil Res.

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Abstract. The effect of a nitrification inhibitor on nitrous oxide (N 2 O) emissions across seasons, the effect of a urease inhibitor and a fine particle spray (both targeting ammonia (NH 3 ) loss) on N 2 O emissions, and the potential for productivity benefits and efficiencies by using these enhanced efficiency fertilisers (EEFs) were investigated in temperate pastures. The study compared three treatments over an eight month period (April to December 2010): (1) urea (U), (2) urea with a nitrification inhibitor (3,4-dimethylpyrazole phosphate) (DMPP), and (3) urea with a urease inhibitor (N-(n-butyl) thiophosphoric triamide (NBTPT)) (GU). In autumn, when NH 3 loss was predicted to be high, the effect of urea applied as a fine particle spray (containing urea, NBTPT and gibberellic acid (10 g ha -1 )) (FPA) on N 2 O emissions and productivity was determined.N 2 O emissions from urea applied to pastures were low, and were larger in spring than autumn due to soil moisture and temperature. DMPP was an effective tool for mitigating N 2 O emissions, decreasing fertiliser-induced N 2 O emissions relative to urea by 76% over eight months. However, the urease inhibitor (NBTPT) (GU) increased N 2 O emissions from urea by 153% over eight months. FPA had no impact on N 2 O, but was only examined during periods of low emission (autumn). No significant biomass productivity, agronomic efficiency benefits, or improvements in apparent fertiliser recovery were observed with the DMPP and GU treatments. A significant biomass productivity benefit was observed with the FPA treatment 55 days after fertiliser was applied, most likely because of the gibberellic acid. The outcomes highlight that although DMPP effectively decreased N 2 O emissions it had no impact on biomass productivity compared with urea. The use of the GU increased N 2 O emissions by preserving NH 3 in the soil. To avoid this a lower rate of N should be applied with the urease inhibitor.

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

et al. 2020

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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.

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Urease inhibitor reduces N losses and improves plant-bioavailability of urea applied in fine particle and granular forms under field conditions

Cited by 69 publications

References 71 publications

Spatial variation of soil quality and pollution assessment of heavy metals in cultivated soils of Henan Province, China

Spatial variation of soil quality and pollution assessment of heavy metals in cultivated soils of Henan Province, China

Influence of enhanced efficiency fertilisation techniques on nitrous oxide emissions and productivity response from urea in a temperate Australian ryegrass pasture

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

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