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KINETIC AND THERMODYNAMIC BEHAVIORS OF SOIL UREASE AS AFFECTED BY UREASE INHIBITORS R.C. Suelo Nutr. Veg.
Juan,Y.H; Chen,Z.H; Chen,L.J; Wu,Z.J; Wang,R; Sun,W.T; Zhang,Y.L.
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...
Tipo: Journal article Palavras-chave: Meterkinetic paras; Thermodynamic parameters; Soil urease; Urease inhibitors; Temperatures.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-27912010000100001
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