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	Kinetic model for methane oxidation by paddy soil as affected by temperature, moisture and N addition
	Cai, ZC; Yan, XY
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	1999-05-01
卷号	31期号:5页码:715-725
ISSN号	0038-0717
通讯作者	Cai, ZC()
英文摘要	The process of CH(4) oxidation by a paddy soil incubated under an initial CH(4) concentration of approximately 900 mu l l(-1) was simulated by a kinetic model, which assumed that the CH(4) oxidation activity of soil, a product of the specific activity of the: individual and the number of methanotropic bacteria, was dependent on the CH(4) concentration during the incubation. The results showed that the model could very well simulate the process of CH, oxidation by the paddy soil in a closed system. The simulated results implied that CH(4) oxidation activity of the soil was induced at the beginning of the incubation, suggesting the growth of the methanotrophic bacterial community, then declined after reaching a peaked value. Additions of both NH(4)Cl and KCI not only significantly inhibited the initial special activity of the individual, but suppressed population growth as well. There was no significant difference of NH(4)Cl and KCl addition to inhibit the initial specific activity of the individual bacteria at the same added concentration, while NH(4)(+) was more effective to suppress population growth than K(+). The optimum temperature for CH(4) oxidation by the paddy soil was about 35 degrees C and the initial apparent activation energies varied from 59.7 to 159.1 kJ mol(-1). The growth of methanotrophic bacteria almost ceased at temperatures above 40 degrees C or below 12.5 degrees C. The optimum water content for the soil to oxidize CH(4) was 280 g kg(-1), at which point, the specific activity of the individual bacteria was the highest and the increase in the oxidation activity was the fastest. The response of the CH(4) oxidation activity to drying below the optimum was more sensitive than to wetting above the optimum. The prompt response of CH(4) oxidation activity to elevated CH(4) concentration and the decrease in sensitivity to wetting above the optimum moisture would be important for paddy soils to mitigate the emission of CH(4) produced endogenously, (C) 1999 Elsevier Science Ltd. All rights reserved.
收录类别	SCI
WOS关键词	LANDFILL COVER SOIL ; METHANOTROPHIC BACTERIA ; ATMOSPHERIC METHANE ; CH4 OXIDATION ; NITROGEN-FERTILIZATION ; SEASONAL-VARIATION ; RICE PADDIES ; FOREST SOILS ; OXIC SOILS ; CONSUMPTION
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000080092100008
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2559105
专题	南京土壤研究所
通讯作者	Cai, ZC
作者单位	Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China
推荐引用方式 GB/T 7714	Cai, ZC,Yan, XY. Kinetic model for methane oxidation by paddy soil as affected by temperature, moisture and N addition[J]. SOIL BIOLOGY & BIOCHEMISTRY,1999,31(5):715-725.
APA	Cai, ZC,&Yan, XY.(1999).Kinetic model for methane oxidation by paddy soil as affected by temperature, moisture and N addition.SOIL BIOLOGY & BIOCHEMISTRY,31(5),715-725.
MLA	Cai, ZC,et al."Kinetic model for methane oxidation by paddy soil as affected by temperature, moisture and N addition".SOIL BIOLOGY & BIOCHEMISTRY 31.5(1999):715-725.

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