Effects of the nitrification inhibitor nitrapyrin and tillage practices on yield-scaled nitrous oxide emission from a maize field in Iran  

作　　者：Azam BORZOUEI Ulo MANDER Alar TEEMUSK Alberto SANZ-COBENA Mohammad ZAMAN Dong-Gill KIM Christoph MÜLLER Ali Askary KELESTANIE Parvaneh SAYYAD AMIN Ebrahim MOGHISEH Khadim DAWAR Ana Gabriela PÉREZ-CASTILLO 

机构地区：[1]Agricultural Research School,Nuclear Science and Technology Research Institute,Karaj 31465-1498(Iran) [2]Institute of Ecology and Earth Sciences,University of Tartu,Tartu 51014(Estonia) [3]Higher Technical School of Engineering(ESTI),Technical University of Madrid,Madrid 28040(Spain) [4]Soil and Water Management&Crop Nutrition,Joint Food and Agriculture Organization of the United Nations(FAO)/International Atomic Energy Agency(IAEA)Division of Nuclear Techniques in Food&Agriculture,Vienna A-1400(Austria) [5]Wondo Genet College of Forestry and Natural Resources,Hawassa University,P.O.Box 128,Shashemene(Ethiopia) [6]Department of Plant Ecology,University Giessen,Heinrich-Buff-Ring 26,Giessen D-35392(Germany) [7]School of Biology and Environmental Science,University College Dublin,Belfield D04 V1W8(Ireland) [8]Faculty of Agriculture and Natural Resources,University of Gorgan,Gorgan 3158777871(Iran) [9]Department of Agronomy and Plant Breeding,College of Agriculture and Natural Resources,University of Tehran,Karaj 1417466191(Iran) [10]Department of Soil and Environmental Sciences,Agricultural University Peshawar,Peshawar 25130(Pakistan) [11]Center of Environmental Contamination Investigation,University of Costa Rica,Mountains of Oca 1150(Costa Rica)

出　　处：《Pedosphere》2021年第2期314-322,共9页土壤圈（英文版）

基　　金：funded by the International Atomic Energy Agency,Vienna,through the coordinated research project Minimizing Farming Impacts on Climate Change by Enhancing Carbon and Nitrogen Capture and Storage in AgroEcosystems(No.18595)of Soil and Water Management and Crop Nutrition Section,Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture,Department of Nuclear Sciences and Applications,Vienna,Austria。

摘　　要：Nitrification inhibitors can effectively decrease nitrification rates and nitrous oxide(N_(2)O)emission while increasing crop yield under certain conditions.However,there is no information available on the effects of nitrification inhibitors and tillage practices on N_(2)O emissions from maize cropping in Iran.To study how tillage practices and nitrapyrin(a nitrification inhibitor)affect N_(2)O emission,a split factorial experiment using a completely randomized block design with three replications was carried out in Northeast Iran,which has a cold semiarid climate.Two main plots were created with conventional tillage and minimum tillage levels,and two nitrogen(N)fertilizer(urea)management systems(with and without nitrapyrin application)were created as subplots.Tillage level did not have any significant effect on soil ammonium(NH_(4)^(+))and nitrate(NO_(3)^(-))concentrations,cumulative amount and yield-scaled N_(2)O emission,and aboveground biomass of maize,whereas nitrapyrin application showed significant effect.Nitrapyrin application significantly reduced the cumulative amount of N_(2)O emission by 41%and 32%in conventional tillage and minimum tillage practices,respectively.A reduction in soil NO_(3)^(-)concentration by nitrapyrin was also observed.The average yield-scaled N_(2)O emission was 13.6 g N_(2)O-N kg^(-1)N uptake in both tillage systems without nitrapyrin application and was significantly reduced to 7.9 and 8.2 g N_(2)O-N kg^(-1)N uptake upon the application of nitrapyrin in minimum tillage and conventional tillage practices,respectively.Additionally,nitrapyrin application increased maize biomass yield by 4%and 13%in the minimum tillage and conventional tillage systems,respectively.Our results indicate that nitrapyrin has a potential role in reducing N_(2)O emission from agricultural systems where urea fertilizers are broadcasted,which is common in Iran due to the practice of traditional farming.

关 键 词：conventional tillage cumulative emission minimum tillage nitrogen use efficiency N_(2)O flux soil inorganic nitrogen UREA 

分 类 号：S513[农业科学—作物学]