气候变化领域集成服务门户(CCPortal): Effects of nitrate concentration on the denitrification potential of a calcic cambisol and its fractions of N-2, N2O and NO

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DOI	10.1007/s11104-012-1264-x
	Effects of nitrate concentration on the denitrification potential of a calcic cambisol and its fractions of N-2, N2O and NO
	Wang, Rui; Feng, Qi; Liao, Tingting; Zheng, Xunhua; Butterbach-Bahl, Klaus; Zhang, Wei; Jin, Chunyi
发表日期	2013
ISSN	0032-079X
EISSN	1573-5036
卷号	363 期号:2019-01-02
英文摘要	The direct measurement of denitrification dynamics and its product fractions is important for parameterizing process-oriented model(s) for nitrogen cycling in various soils. The aims of this study are to a) directly measure the denitrification potential and the fractions of nitrogenous gases as products of the process in laboratory, b) investigate the effects of the nitrate (NO (3) (-) ) concentration on emissions of denitrification gases, and c) test the hypothesis that denitrification can be a major pathway of nitrous oxide (N2O) and nitric oxide (NO) production in calcic cambisols under conditions of simultaneously sufficient supplies of carbon and nitrogen substrates and anaerobiosis as to be found to occur commonly in agricultural lands. Using the helium atmosphere (with or without oxygen) gas-flow-soil-core technique in laboratory, we directly measured the denitrification potential of a silt clay calcic cambisol and the production of nitrogen gas (N-2), N2O and NO during denitrification under the conditions of seven levels of NO (3) (-) concentrations (ranging from 10 to 250 mg N kg(-1) dry soil) and an almost constant initial dissolved organic carbon concentration (300 mg C kg(-1) dry soil). Almost all the soil NO (3) (-) was consumed during anaerobic incubation, with 80-88 % of the consumed NO (3) (-) recovered by measuring nitrogenous gases. The results showed that the increases in initial NO (3) (-) concentrations significantly enhanced the denitrification potential and the emissions of N-2 and N2O as products of this process. Despite the wide range of initial NO (3) (-) concentrations, the ratios of N-2, N2O and NO products to denitrification potential showed much narrower ranges of 51-78 % for N-2, 14-36 % for N2O and 5-22 % for NO. These results well support the above hypothesis and provide some parameters for simulating effects of variable soil NO (3) (-) concentrations on denitrification process as needed for biogeochemical models.
关键词	Nitrogen gas (N-2)Nitrous oxide (N2O)Nitric oxide (NO)Gas flow soil core technique Denitrification Nitrate (NO3-)
学科领域	Agriculture; Plant Sciences
语种	英语
WOS研究方向	Agronomy ; Plant Sciences ; Soil Science
来源期刊	PLANT AND SOIL
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111708
作者单位	Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang, Rui,Feng, Qi,Liao, Tingting,et al. Effects of nitrate concentration on the denitrification potential of a calcic cambisol and its fractions of N-2, N2O and NO[J]. 中国科学院西北生态环境资源研究院,2013,363(2019-01-02).
APA	Wang, Rui.,Feng, Qi.,Liao, Tingting.,Zheng, Xunhua.,Butterbach-Bahl, Klaus.,...&Jin, Chunyi.(2013).Effects of nitrate concentration on the denitrification potential of a calcic cambisol and its fractions of N-2, N2O and NO.PLANT AND SOIL,363(2019-01-02).
MLA	Wang, Rui,et al."Effects of nitrate concentration on the denitrification potential of a calcic cambisol and its fractions of N-2, N2O and NO".PLANT AND SOIL 363.2019-01-02(2013).