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	Effects of biochar on nitrous oxide and nitric oxide emissions from paddy field during the wheat growth season
	Xiang, Jian1,2; Liu, Deyan1; Ding, Weixin1; Yuan, Junji1,2; Lin, Yongxin1,2
刊名	JOURNAL OF CLEANER PRODUCTION
	2015-10-01
卷号	104页码:52-58
关键词	Optimal fertilization Biochar N2O NO GWP
ISSN号	0959-6526
DOI	10.1016/j.jclepro.2014.12.038
通讯作者	Ding, Weixin(wxding@mail.issas.ac.cn)
英文摘要	Agricultural activities are an important source of atmospheric nitrous oxide (N2O). Excess nitrogen (N) fertilization in the Taihu Lake region, southeast China, has resulted in a series of environmental issues such as N2O emissions and water body eutrophication. Optimal fertilization can reduce the loss of surplus N with a penalty of no or low yield. The conversion of plant residues to biochar is an attractive strategy for mitigating atmospheric carbon dioxide emissions and for enhancing carbon storage in soil. A field experiment was conducted to investigate the effect of biochar on N2O emissions, crop yield, and global warming potential (GWP). Five treatments were conducted with four replicates: no nitrogen fertilizer (Control), locally conventional N fertilizer (RN), optimal N fertilizer (ON), optimal N fertilizer plus low amount of biochar [3.75 t ha(-1); (ONC1)], and optimal N fertilizer plus high amount of biochar [7.50 t ha(-1); (ONC2)]. Results showed that both N2O and NO emissions increased exponentially with the N fertilizer application rate during the wheat growth season, and cumulative N2O emissions were significantly (P < 0.05) reduced in the ON treatment Biochar amendment at 3.75 and 7.50 t ha(-1) did not notably reduce N2O emissions. A significant negative correlation was observed between N2O flux and the soil water-filled pore space (WFPS) in biochar amendment, and the NO/N2O ratio was almost lower than 1, except for tillering fertilization when the soil WFPS was lower, indicating that N2O was primarily produced by denitrification. The GWP was significantly mitigated in the ON treatment compared with the RN treatment, which was significantly lower in the biochar treatment (P < 0.05). The greenhouse gas intensity (GHGI) also decreased from 0.039 to 0.031 kg CO2-eq kg(-1) yield after biochar addition. GWP and GHGI results indicated that the application of biochar could significantly mitigate GWP compared with the ON treatment. Our results suggest that the application of biochar slightly reduced N2O emission, which might contribute to promote the reduction N2O to N-2. Optimal N fertilization, especially, combined with biochar will exercise a greater effect for mitigating global warming. (C) 2014 Elsevier Ltd. All rights reserved.
收录类别	SCI
WOS关键词	IRRIGATED CROPPING SYSTEMS ; GREENHOUSE-GAS EMISSIONS ; N2O EMISSIONS ; N FERTILIZATION ; CO2 EMISSIONS ; LOAM SOIL ; RICE ; DENITRIFICATION ; ROTATION ; IMPACT
WOS研究方向	Engineering ; Environmental Sciences & Ecology
WOS类目	Engineering, Environmental ; Environmental Sciences
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000357552900005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558363
专题	南京土壤研究所
通讯作者	Ding, Weixin
作者单位	1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, 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	Xiang, Jian,Liu, Deyan,Ding, Weixin,et al. Effects of biochar on nitrous oxide and nitric oxide emissions from paddy field during the wheat growth season[J]. JOURNAL OF CLEANER PRODUCTION,2015,104:52-58.
APA	Xiang, Jian,Liu, Deyan,Ding, Weixin,Yuan, Junji,&Lin, Yongxin.(2015).Effects of biochar on nitrous oxide and nitric oxide emissions from paddy field during the wheat growth season.JOURNAL OF CLEANER PRODUCTION,104,52-58.
MLA	Xiang, Jian,et al."Effects of biochar on nitrous oxide and nitric oxide emissions from paddy field during the wheat growth season".JOURNAL OF CLEANER PRODUCTION 104(2015):52-58.

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