KINETIC AND THERMODYNAMIC BEHAVIORS OF SOIL UREASE AS AFFECTED BY UREASE INHIBITORS

The kinetic characteristics of soil urease have attracted great attention, but little information was available on its kinetic and thermodynamic behaviors as affected by urease inhibitors and temperature. With black soil (Pachic Udic Mollisol) in Heilongjiang Province of Northeast China as a test so...

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Autores principales:	Juan,Y.H, Chen,Z.H, Chen,L.J, Wu,Z.J, Wang,R, Sun,W.T, Zhang,Y.L
Lenguaje:	English
Publicado:	Sociedad Chilena de la Ciencia del Suelo 2010
Materias:	meterkinetic paras thermodynamic parameters soil urease urease inhibitors temperatures
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000100001
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spelling	oai:scielo:S0718-279120100001000012010-04-21KINETIC AND THERMODYNAMIC BEHAVIORS OF SOIL UREASE AS AFFECTED BY UREASE INHIBITORSJuan,Y.HChen,Z.HChen,L.JWu,Z.JWang,RSun,W.TZhang,Y.L meterkinetic paras thermodynamic parameters soil urease urease inhibitors temperatures The kinetic characteristics of soil urease have attracted great attention, but little information was available on its kinetic and thermodynamic behaviors as affected by urease inhibitors and temperature. With black soil (Pachic Udic Mollisol) in Heilongjiang Province of Northeast China as a test soil, an incubation test was conducted to investigate the effect of urease inhibitors (hydroquinone, HQ; phenyl phosphorodiamidate, PPD; N-(n-Butyl) thiophosphoric triamide, NBPT) on kinetic and thermodynamic behaviors of soil urease at 10°C, 20°C and 30°C. The results showed that all tested inhibitors increased Km and decreased Vmax, behaving as mixed inhibitors to soil urease. With increasing temperature, the Km and Vmax values increased significantly. With incubation time, Km decreased, while Vmax significantly increased. Compared with control, treatment HQ decreased soil urease thermodynamic parameters Ea, AH, and Qi0, but in PPD and NBPT treatments, the parameters increased slightly. The Qio and AH of soil urease decreased slightly with increasing temperature. Among test inhibitors, PPD and NBPT were more effective in influencing the kinetic and thermodynamic behaviors of urease in black soil. The variations in kinetic and thermodynamic parameters indicated that the effects of urease inhibitors on soil urease are greater on kinetic behaviors rather than on thermodynamic ones.info:eu-repo/semantics/openAccessSociedad Chilena de la Ciencia del SueloRevista de la ciencia del suelo y nutrición vegetal v.10 n.1 20102010-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000100001en10.4067/S0718-27912010000100001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	meterkinetic paras thermodynamic parameters soil urease urease inhibitors temperatures
spellingShingle	meterkinetic paras thermodynamic parameters soil urease urease inhibitors temperatures Juan,Y.H Chen,Z.H Chen,L.J Wu,Z.J Wang,R Sun,W.T Zhang,Y.L KINETIC AND THERMODYNAMIC BEHAVIORS OF SOIL UREASE AS AFFECTED BY UREASE INHIBITORS
description	The kinetic characteristics of soil urease have attracted great attention, but little information was available on its kinetic and thermodynamic behaviors as affected by urease inhibitors and temperature. With black soil (Pachic Udic Mollisol) in Heilongjiang Province of Northeast China as a test soil, an incubation test was conducted to investigate the effect of urease inhibitors (hydroquinone, HQ; phenyl phosphorodiamidate, PPD; N-(n-Butyl) thiophosphoric triamide, NBPT) on kinetic and thermodynamic behaviors of soil urease at 10°C, 20°C and 30°C. The results showed that all tested inhibitors increased Km and decreased Vmax, behaving as mixed inhibitors to soil urease. With increasing temperature, the Km and Vmax values increased significantly. With incubation time, Km decreased, while Vmax significantly increased. Compared with control, treatment HQ decreased soil urease thermodynamic parameters Ea, AH, and Qi0, but in PPD and NBPT treatments, the parameters increased slightly. The Qio and AH of soil urease decreased slightly with increasing temperature. Among test inhibitors, PPD and NBPT were more effective in influencing the kinetic and thermodynamic behaviors of urease in black soil. The variations in kinetic and thermodynamic parameters indicated that the effects of urease inhibitors on soil urease are greater on kinetic behaviors rather than on thermodynamic ones.
author	Juan,Y.H Chen,Z.H Chen,L.J Wu,Z.J Wang,R Sun,W.T Zhang,Y.L
author_facet	Juan,Y.H Chen,Z.H Chen,L.J Wu,Z.J Wang,R Sun,W.T Zhang,Y.L
author_sort	Juan,Y.H
title	KINETIC AND THERMODYNAMIC BEHAVIORS OF SOIL UREASE AS AFFECTED BY UREASE INHIBITORS
title_short	KINETIC AND THERMODYNAMIC BEHAVIORS OF SOIL UREASE AS AFFECTED BY UREASE INHIBITORS
title_full	KINETIC AND THERMODYNAMIC BEHAVIORS OF SOIL UREASE AS AFFECTED BY UREASE INHIBITORS
title_fullStr	KINETIC AND THERMODYNAMIC BEHAVIORS OF SOIL UREASE AS AFFECTED BY UREASE INHIBITORS
title_full_unstemmed	KINETIC AND THERMODYNAMIC BEHAVIORS OF SOIL UREASE AS AFFECTED BY UREASE INHIBITORS
title_sort	kinetic and thermodynamic behaviors of soil urease as affected by urease inhibitors
publisher	Sociedad Chilena de la Ciencia del Suelo
publishDate	2010
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000100001
work_keys_str_mv	AT juanyh kineticandthermodynamicbehaviorsofsoilureaseasaffectedbyureaseinhibitors AT chenzh kineticandthermodynamicbehaviorsofsoilureaseasaffectedbyureaseinhibitors AT chenlj kineticandthermodynamicbehaviorsofsoilureaseasaffectedbyureaseinhibitors AT wuzj kineticandthermodynamicbehaviorsofsoilureaseasaffectedbyureaseinhibitors AT wangr kineticandthermodynamicbehaviorsofsoilureaseasaffectedbyureaseinhibitors AT sunwt kineticandthermodynamicbehaviorsofsoilureaseasaffectedbyureaseinhibitors AT zhangyl kineticandthermodynamicbehaviorsofsoilureaseasaffectedbyureaseinhibitors
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KINETIC AND THERMODYNAMIC BEHAVIORS OF SOIL UREASE AS AFFECTED BY UREASE INHIBITORS

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