Mitigating nitrous oxide emission from soil under conventional and no-tillage in wheat using nitrification inhibitors

被引:104
作者
Bhatia, A. [1 ]
Sasmal, S. [1 ]
Jain, N. [1 ]
Pathak, H. [1 ]
Kumar, R. [2 ]
Singh, A. [1 ]
机构
[1] Indian Agr Res Inst, Div Environm Sci, New Delhi 110012, India
[2] Indian Agr Res Inst, Div Agr Chem, New Delhi 110012, India
关键词
Global warming potential; Nitrous oxide emission; No-tillage; Wheat; Nitrification inhibitor; S-benzylisothiouronium derivatives; FILLED PORE-SPACE; METHANE EMISSIONS; FERTILIZER; N2O; DENITRIFICATION; MANAGEMENT; FLUXES; DICYANDIAMIDE; AGRICULTURE; COMPACTION;
D O I
10.1016/j.agee.2010.01.004
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
No-till farming in wheat is being practiced in the rice-wheat system of the Indo-Gangetic plains of south Asia for resource conservation. No-tillage leads to mitigation of carbon dioxide emission, but may emit more nitrous oxide (N2O) as compared to conventional tillage reducing mitigation benefit. The aim of this study was assessment of N2O emission in wheat grown under conventional and no-tillage and its mitigation using two new nitrification inhibitors, viz. S-benzylisothiouronium butanoate (SBT-butanoate) and S-benzylisothiouronium furoate (SBT-furoate). Cumulative emission of N2O-N was higher under no-tillage by 12.2% with urea fertilization and from 4.1 to 4.8% for the inhibitor treatments as compared to the conventional tillage. In no-tillage total emission of N2O-N reduced from 0.43% of applied N with urea to 0.29% of applied N with SBT-furoate treatment. The N2O-N emissions in SBT-butanoate treatment were at par with the standard dicyandiamide (DCD) inhibitor treatment. Water-filled pore space (WFPS) was higher on most days under no-tillage, with the largest emissions (>1000 mu g N2O-N m(-2) day(-1)) coming with nitrification of ammonium-N present in soil below 60% WFPS. Carbon efficiency ratio was highest (48.1) from SBT-furoate treatment under conventional tillage. The nitrification inhibitors used in the study increased yield of wheat, reduced global warming potential by 8.9-19.5% over urea treatment and may be used to mitigate N2O emission. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:247 / 253
页数:7
相关论文
共 40 条
[11]   Denitrification and nitrous oxide to nitrous oxide plus dinitrogen ratios in the soil profile under three tillage systems [J].
Elmi, AA ;
Madramootoo, C ;
Hamel, C ;
Liu, A .
BIOLOGY AND FERTILITY OF SOILS, 2003, 38 (06) :340-348
[12]  
Galloway JN, 2003, BIOSCIENCE, V53, P341, DOI 10.1641/0006-3568(2003)053[0341:TNC]2.0.CO
[13]  
2
[14]  
GUTHRIE TF, 1980, J ENVIRON QUAL, V4, P275
[15]   Effects of tillage on soil microrelief, surface depression storage and soil water storage [J].
Guzha, AC .
SOIL & TILLAGE RESEARCH, 2004, 76 (02) :105-114
[16]  
IPCC, 2007, SUMM POL CLIM CHANG, P22
[17]  
Keeney D. R., 1982, Methods of soil analysis. Part 2. Chemical and microbiological properties, P711
[18]   Tillage and urea ammonium nitrate fertilizer rate and placement affects winter wheat following grain sorghum and soybean [J].
Kelley, KW ;
Sweeney, DW .
AGRONOMY JOURNAL, 2005, 97 (03) :690-697
[19]   FATE OF N-15-DEPLETED AMMONIUM-NITRATE APPLIED TO NO-TILLAGE AND CONVENTIONAL TILLAGE CORN [J].
KITUR, BK ;
SMITH, MS ;
BLEVINS, RL ;
FRYE, WW .
AGRONOMY JOURNAL, 1984, 76 (02) :240-242
[20]  
Klute A., 1986, BULK DENSITY METHODS, P363, DOI DOI 10.2136/SSSABOOKSER5.1.2ED.C13