KINETICS OF SOIL UREASE AFFECTED BY UREASE INHIBITORS AT CONTRASTING MOISTURE REGIMES

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	KINETICS OF SOIL UREASE AFFECTED BY UREASE INHIBITORS AT CONTRASTING MOISTURE REGIMES
	Juan, YH; Chen, LJ; Wu, ZJ; Wang, R; Chen, LJ, Chinese Acad Sci, Inst Appl Ecol, POB 417, Shenyang 110016, Peoples R China
刊名	REVISTA DE LA CIENCIA DEL SUELO Y NUTRICION VEGETAL
	2009
卷号	9 期号:2 页码:125-133
关键词	Kinetic Parameters Mixed Inhibition Moisture Regime Soil Urease
ISSN号	0717-635X
英文摘要	With black soil (Pachic Udic Argiboroll) of Northeastern China as the test object, an incubation test was conducted to investigate the effects of urease inhibitors, hydroquinone (HQ), phenyl phosphorodiamidate (PPD) and N-(n-Butyl) thiophosphoric triamide (NBPT), on the kinetic characteristics of soil urease under normal moisture and waterlogged conditions, aimed to study the changes of catalytic potential of soil urease and the inhibition mechanisms. The results showed that test urease exhibited typical Michaelis-Menten kinetic behaviors, and all test inhibitors increased the K-m and decreased the V-max of soil urease, behaving as mixed inhibitors to soil urease. Under both normal and waterlogged conditions, compared with HQ, PPD and NBPT made K-m increase and V-max and V-max/K-m decrease more greatly, and the duration of these effects was longer (ca. 30 days vs. 10 days). Under water-logging, PPD made more increment of K-m and more decrement of V-max and V-max/K-m than NBPT, compared with that under normal soil moisture condition, suggesting that NBPT was more available under normal soil moisture condition, while PPD was promising under water-logging condition. To apply urease inhibitors and to control soil moisture condition could be a feasible way in increasing fertilizer N use efficiency affected by soil urease.
学科主题	Soil Science
语种	英语
WOS记录号	WOS:000269531800004
资助机构	National Basic Research Program of China (973 Program) [2007CB109307]; Chinese Government Science and Technology Supporting Program [2006BAD10B01]
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54067]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Chen, LJ, Chinese Acad Sci, Inst Appl Ecol, POB 417, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Juan, YH,Chen, LJ,Wu, ZJ,et al. KINETICS OF SOIL UREASE AFFECTED BY UREASE INHIBITORS AT CONTRASTING MOISTURE REGIMES[J]. REVISTA DE LA CIENCIA DEL SUELO Y NUTRICION VEGETAL,2009,9(2):125-133.
APA	Juan, YH,Chen, LJ,Wu, ZJ,Wang, R,&Chen, LJ, Chinese Acad Sci, Inst Appl Ecol, POB 417, Shenyang 110016, Peoples R China.(2009).KINETICS OF SOIL UREASE AFFECTED BY UREASE INHIBITORS AT CONTRASTING MOISTURE REGIMES.REVISTA DE LA CIENCIA DEL SUELO Y NUTRICION VEGETAL,9(2),125-133.
MLA	Juan, YH,et al."KINETICS OF SOIL UREASE AFFECTED BY UREASE INHIBITORS AT CONTRASTING MOISTURE REGIMES".REVISTA DE LA CIENCIA DEL SUELO Y NUTRICION VEGETAL 9.2(2009):125-133.