N2O and NO production in various Chinese agricultural soils by nitrification

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	N2O and NO production in various Chinese agricultural soils by nitrification
	Cheng, WG; Tsuruta, H; Chen, GX; Yagi, K; Cheng, WG, Natl Inst Agroenvironm Sci, Dept Global Resources, 3-1-3 Kannondai, Tsukuba, Ibaraki 3058604, Japan
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2004
卷号	36 期号:6 页码:953-963
关键词	Chinese Agricultural Soils Nitric Oxide Nitrification Nitrous Oxide Ph
ISSN号	0038-0717
英文摘要	Eleven types of agricultural soils were collected from Chinese uplands and paddy fields to compare their N2O and NO production by nitrification under identical laboratory conditions. Before starting the assays, all air-dried soils were preincubated for 4 weeks at 25 degreesC and 40% WFPS (water-filled pore space). The nitrification activities of soils were determined by adding (NH4)(2)SO4 (200 mg N kg(-1) soil) and incubating for 3 weeks at 25 degreesC and 60% WFPS. The net nitrification rates obtained fitted one of two types of models, depending on the soil pH: a zero-order reaction model for acidic soils and one neutral soil (Group 0); or a first-order reaction model for one neutral soil and alkaline soils (Group 1). The results suggest that pH is the most important factor in determining the kinetics of soil nitrification from ammonium. In the Group 1 soils, initial emissions (i.e. during the first week) of N2O and NO were 82.6 and 83.6%, respectively, of the total emissions during 3 weeks of incubation; in the Group 0 soils, initial emissions of N2O and NO were 54.7 and 59.9%, respectively, of the total emissions. The net nitrification rate in the first week and second-third weeks were highly correlated with the initial and subsequent emissions (i.e. during the second and third weeks), respectively, of N2O and NO. The average percentages of emitted (N2O + NO)-N relative to net nitrification N in initial and subsequent periods were 2.76 and 0.59 for Group 0, and 1.47 and 0.44 for the Group 1, respectively. The initial and subsequent emission ratios of NO/N2O from Group 0 (acidic) soils were 3.77 and 2.52 times, respectively, higher than those from Group 1 soils (P < 0.05). (C) 2004 Elsevier Ltd. All rights reserved.
学科主题	Soil Science
语种	英语
WOS记录号	WOS:000221848900009
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55291]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Cheng, WG, Natl Inst Agroenvironm Sci, Dept Global Resources, 3-1-3 Kannondai, Tsukuba, Ibaraki 3058604, Japan
推荐引用方式 GB/T 7714	Cheng, WG,Tsuruta, H,Chen, GX,et al. N2O and NO production in various Chinese agricultural soils by nitrification[J]. SOIL BIOLOGY & BIOCHEMISTRY,2004,36(6):953-963.
APA	Cheng, WG,Tsuruta, H,Chen, GX,Yagi, K,&Cheng, WG, Natl Inst Agroenvironm Sci, Dept Global Resources, 3-1-3 Kannondai, Tsukuba, Ibaraki 3058604, Japan.(2004).N2O and NO production in various Chinese agricultural soils by nitrification.SOIL BIOLOGY & BIOCHEMISTRY,36(6),953-963.
MLA	Cheng, WG,et al."N2O and NO production in various Chinese agricultural soils by nitrification".SOIL BIOLOGY & BIOCHEMISTRY 36.6(2004):953-963.