Soil properties and the ability of the urease inhibitor N-(n-BUTYL) thiophosphoric triamide (nBTPT) to reduce ammonia volatilization from surface-applied urea

Watson, C. J.; Miller, Helen R.; Poland, Polska Akademia Nauk; Kilpatrick, D. J.; Allen, Myria Watkins; Garrett, M. K.; Christianson, C. B.

doi:10.1016/0038-0717(94)90139-2

Cited by 144 publications

(92 citation statements)

References 20 publications

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“…Ferguson and Kissel (1986) observed transport of urea from depth to the surface with evaporating water on a very fine sandy loam soil while Bouwmeester et al (1985) found reduced NH 3 loss with drying of a soil with a clay content of 470 mg kg -1 at wind speeds approximating those present in the field. Use of NBPT may be most beneficial when soil conditions are conducive to high NH 3 volatilization from urea such as warm, drying, coarse-textured soils with elevated urease activity, low CEC, and high pH (Hargrove 1988;Watson et al 1994b). Under these conditions, downward diffusion of urea and NH 3 , and retention of NH 4 + on the soil is limited, and NH 3 formation is rapid (Sherlock and Goh 1985).…”

Section: Discussionmentioning

confidence: 99%

Ammonia volatilization from soils fertilized with urea and varying rates of urease inhibitor NBPT

Rawluk¹,

Grant²,

Racz³

2001

Can. J. Soil. Sci.

149

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. 2001. Ammonia volatilization from soils fertilized with urea and varying rates of urease inhibitor NBPT. Can. J. Soil Sci. 81: 239-246. Loss of N as ammonia (NH 3 ) from surface-applied urea fertilizer may be high if hydrolysis takes place at the soil surface. The urease inhibitor N-(n-butyl) thiophosphoric triamide (NBPT) may reduce NH 3 loss from urea by delaying hydrolysis. Field studies using surface chambers were conducted in 1996 and 1997 to compare the amount of NH 3 volatilized from surface applications of granular urea (100 kg N ha -1 ) treated with varying concentrations of NBPT (0, 0.05, 0.10 and 0.15% NBPT wt/wt). The studies were conducted on two Orthic Black Chernozemic soils, a Stockton fine sandy loam and a Newdale clay loam, in May and again in July to determine the relative influence of soil texture and temperature on NBPT performance at the varying rates. Ammonia losses were measured at various times to 12 d after fertilization (DAF) in 1996 and to 21 DAF in 1997. Total NH 3 losses decreased in the order of 0% > 0.05% > 0.15% ≥ 0.10% where use of NBPT reduced total NH 3 loss by 28-88% over the entire study duration, and by 82 to 96% during periods of peak loss from unamended urea. Ammonia volatilization losses from NBPT-amended urea treatments were lower in May than in July. The total loss measured at all rates of NBPT was higher for the fine sandy loam soil except in May 1997 where cool conditions resulted in slightly lower loss than for the clay loam soil. Amending urea with NBPT at a rate as low as 0.05% wt/wt can reduce NH 3 loss from surface-placed urea fertilizer, so that a greater proportion of fertilizer N is retained in the soil for plant use. The inhibitor helps reduce the amount of NH 3 derived from urea entering the atmosphere to react or to be deposited elsewhere, and may lessen the need to overfertilize to compensate for potential NH 3 losses. Le N-(n-butyl)-triamide de l'acide thiophosphorique (NBPT) est un inhibiteur de l'uréase et pourrait réduire les pertes de NH 3 de l'urée en retardant l'hydrolyse. En 1996 et 1997, les auteurs ont effectué des études sur le terrain au moyen de chambres de surface en vue de comparer la quantité de NH 3 qui s'échappe dans l'air consécutivement à l'application d'urée granulaire (100 kg N ha -1 ) renfermant une quantité variable de NBPT (0, 0,05, 0,10 et 0,15 % en poids). Les essais se sont effectués sur deux tchernozems orthiques noirs, soit un fin loam sablonneux Stockton et un loam argileux Newdale, en mai puis en juillet, et devaient préciser l'influence relative de la texture et de la température du sol sur l'efficacité du NBPT aux concentrations à l'étude. Les auteurs ont mesuré la perte d'ammoniac à divers moments jusqu'à 12 jours après la fertilisation (JAF) en 1996 et 21 JAF en 1997. La perte totale de NH 3 diminue dans la séquence 0 % > 0,05 % > 0,15 % ≥ 0,10 %, et l'addition de NBPT a réduit la perte totale de NH 3 de 28 à 88 % pendant la durée de l'étude et de 82 à 96 % lors des périodes où les pertes de l'urée non traitées étaien...

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Section: Discussionmentioning

confidence: 99%

Ammonia volatilization from soils fertilized with urea and varying rates of urease inhibitor NBPT

Rawluk¹,

Grant²,

Racz³

2001

Can. J. Soil. Sci.

149

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“…5C, F)) (Ågren, 2004;Yu et al, 2012). In addition, urea could be rapidly broken down by urea-degrading enzymes, which are ubiquitously expressed in microorganisms and released into soil, to allow plants to take up urea-N in the form of ammonium (Watson et al, 1994;Mobley et al, 1995). However, fertilization had no significant effect on the ammonium content of the larches.…”

Section: Leaf N/p Ratios Of the Two Species Under N And P Fertilizationmentioning

confidence: 99%

Effects of nitrogen and phosphorus supply on growth and physiological traits of two Larix species

Guo

Zhang

et al. 2016

Environmental and Experimental Botany

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“…16 The NBPT effectiveness is directly related to soil properties in which low concentration of this urease proinhibitor is needed to achieve the desired result in temperate soils while greater concentrations are required for tropical soils. [17][18][19][20] Additionally, NBPT is more efficient in neutral soils with limited organic matter. 17,21 Tropical soils exhibit organic matter and microbial biomass dynamics different from temperate soils.…”

Section: Introductionmentioning

confidence: 99%

Urease Inhibitors of Agricultural Interest Inspired by Structures of Plant Phenolic Aldehydes

Horta¹,

Mota²,

Barbosa³

et al. 2016

J. Braz. Chem. Soc.

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The plant phenolic natural products (PNPs) protocatechuic aldehyde, syringaldehyde and vanillin were used as platforms for obtaining four urease inhibitors. Urea (urease substrate) or thiourea (urease inhibitor) core was added to the structure of newly synthesized compounds to provide inhibitors up to 230-fold more active than the PNPs they originated from. The PNP derivatives are mixed inhibitors with higher affinity to urease active site. Two compounds were as efficient as N-(butyl)thiophosphoric triamide (NBPT) toward soil. Overall, PNPs derivatives are promising urease inhibitors for use as additive in urea-based fertilizers formulations.

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Soil properties and the ability of the urease inhibitor N-(n-BUTYL) thiophosphoric triamide (nBTPT) to reduce ammonia volatilization from surface-applied urea

Cited by 144 publications

References 20 publications

Ammonia volatilization from soils fertilized with urea and varying rates of urease inhibitor NBPT

Ammonia volatilization from soils fertilized with urea and varying rates of urease inhibitor NBPT

Effects of nitrogen and phosphorus supply on growth and physiological traits of two Larix species

Urease Inhibitors of Agricultural Interest Inspired by Structures of Plant Phenolic Aldehydes

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