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	The effects of rice-straw biochar addition on nitrification activity and nitrous oxide emissions in two oxisols
	He, Lili1,2; Zhao, Xu1; Wang, Shenqiang1; Xing, Guangxi1
刊名	Soil & tillage research
	2016-12-01
卷号	164页码:52-62
关键词	Nitrification kinetic model Oxisols Biochar amendment Ph N2o emissions
ISSN号	0167-1987
DOI	10.1016/j.still.2016.05.006
通讯作者	Zhao, xu(zhaoxu@issas.ac.cn)
英文摘要	Nitrification rates in oxisols vary with soil ph and substrate availability. biochar can be used to improve acid soils. the aim of this study was therefore to investigate the interactive impacts of 1% and 5% (w/w) rice-straw biochar application on nitrification, ammonia oxidizer populations and nitrous oxide (n2o) emissions over short periods of microcosm incubation in two agricultural oxisols derived from granite (rgu) and tertiary red sandstone (rtu), respectively. we measured soil nitrate (no3-) and ammonium (nh4+) concentrations during the incubation and used nitrification kinetic model to assess the response of nitrification to biochar addition. we also performed real-time quantitative polymerase chain reaction (qpcr) to quantify the copies of ammonia-oxidizing archaea (aoa) and ammonia-oxidizing bacteria (aob) genes, and collected n2o gas at various intervals during the 56-day incubation. the addition of ammonium sulfate ((nh4)(2)so4-n) stimulated nitrification in both soils. in rgu, biochar treatments altered soil nitrification patterns to a first-order reaction model; this stimulation was more pronounced with the increase of biochar application rates. in rtu, 1% biochar treatment increased nitrification rate constants, and 5% biochar treatment altered nitrification patterns from a zero-order to a first-order reaction model. treating the two soils with 5% biochar rates significantly increased aob gene copy numbers up to 7.88- and 14-fold compared with the no biochar controls in rgu and rtu, respectively, while the treatments had little or reduced effect on aoa gene copy numbers. biochar addition significantly reduced cumulative n2o emissions up to 37.6% in rgu and 46.4% in rtu, respectively. these results underscore the potential of biochar in the restoration of nitrification and the reduction of greenhouse gas n2o emission in oxisols. (c) 2016 elsevier b.v. all rights reserved.
WOS关键词	PINE FOREST SOILS ; N2O EMISSIONS ; BRAZILIAN OXISOL ; CROP RESIDUES ; ACIDIC SOILS ; CARBON ; CHINA ; ARCHAEA ; RATES ; DENITRIFICATION
WOS研究方向	Agriculture
WOS类目	Soil Science
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000381834100008
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2374435
专题	中国科学院大学
通讯作者	Zhao, Xu
作者单位	1.Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Changshu Natl Agroecosyst Observat & Res Stn, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	He, Lili,Zhao, Xu,Wang, Shenqiang,et al. The effects of rice-straw biochar addition on nitrification activity and nitrous oxide emissions in two oxisols[J]. Soil & tillage research,2016,164:52-62.
APA	He, Lili,Zhao, Xu,Wang, Shenqiang,&Xing, Guangxi.(2016).The effects of rice-straw biochar addition on nitrification activity and nitrous oxide emissions in two oxisols.Soil & tillage research,164,52-62.
MLA	He, Lili,et al."The effects of rice-straw biochar addition on nitrification activity and nitrous oxide emissions in two oxisols".Soil & tillage research 164(2016):52-62.

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