Nitrification inhibitor nitrapyrin does not affect yield-scaled nitrous oxide emissions in a tropical grassland  

作　　者：Ana Gabriela PÉREZ-CASTILLO Cristina CHINCHILLA-SOTO Jorge Alberto ELIZONDO-SALAZAR Ronny BARBOZA Dong-Gill KIM Christoph MÜLLER Alberto SANZ-COBENA Azam BORZOUEI Khadim DAWAR Mohammad ZAMAN 

机构地区：[1]Environmental Pollution Research Center(CICA),University of Costa Rica,Montes de Oca 11501(Costa Rica) [2]Alfredo Volio Mata Experimental Station,University of Costa Rica,Ochomogo 30304(Costa Rica) [3]Wondo Genet College of Forestry and Natural Resources,Hawassa University,P.O.Box 128,Shashemene(Ethiopia) [4]Institute of Plant Ecology,Justus Liebig University Giessen,Heinrich-Buff Ring 26,Giessen 35392(Germany) [5]School of Biology and Environmental Science,University College Dublin,Belfield,Dublin 4(Ireland) [6]Research Center for the Management of Environmental and Agricultural Risks(CEIGRAM),Department of Chemistry and Food Technology(ETSIAAB),Universidad Politécnica de Madrid,Madrid 28040(Spain) [7]Nuclear Agriculture Research School,Nuclear Science and Technology Research Institute(NSTRI),Karaj 31465-1498(Iran) [8]Department of Soil and Environmental Sciences,The University of Agriculture,Peshawar 25000(Pakistan) [9]Soil and Water Management&Crop Nutrition Section,Joint Food and Agriculture Organization(FAO)/International Atomic Energy Agency(IAEA)Division of Nuclear Techniques in Food and Agriculture,Department of Nuclear Sciences and Applications,IAEA,Vienna International Centre,P.O.Box 100,Vienna 1400(Austria)

出　　处：《Pedosphere》2021年第2期265-278,共14页土壤圈（英文版）

基　　金：funded by the International Atomic Energy Agency(IAEA),Vienna,Austria,through a Coordinated Research Project(No.CRP D1.50.16)of the Soil and Water Management and Crop Nutrition Section,Joint FAO/IAEA Division of Nuclear Techniques in Food;Agriculture and through the Technical Cooperation Project(No.COS5031);by the University of Costa Rica(No.VI-802-B7-505)。

摘　　要：Urea is the most common nitrogen(N)fertilizer used in the tropics but it has the risk of high gaseous nitrogen(N)losses.Use of nitrification inhibitor has been suggested as a potential mitigation measure for gaseous N losses in N fertilizer-applied fields.In a field trial on a tropical Andosol pastureland in Costa Rica,gaseous emissions of ammonia(NH_(3))and nitrous oxide(N_(2)O)and grass yield were quantified from plots treated with urea(U;41.7 kg N ha^(-1)application^(-1))and urea plus the nitrification inhibitor nitrapyrin(U+NI;41.7 kg N ha^(-1)application^(-1)and 350 g of nitrapyrin for each 100 kg of N applied)and control plots(without U and NI)over a six-month period(rainy season).Volatilization of NH_(3)(August to November)in U(7.4%±1.3%of N applied)and U+NI(8.1%±0.9%of N applied)were not significantly different(P>0.05).Emissions of N_(2)O in U and U+NI from June to November were significantly different(P<0.05)only in October,when N_(2)O emission in U+NI was higher than that in U.Yield and crude protein production of grass were significantly higher(P<0.05)in U and U+NI than in the control plots,but they were not significantly different between U and U+NI.There was no significant difference in yield-scaled N_(2)O emission between U(0.31±0.10 g N kg^(-1)dry matter)and U+NI(0.47±0.10 g N kg^(-1)dry matter).The results suggest that nitrapyrin is not a viable mitigation option for gaseous N losses under typical N fertilizer application practices of pasturelands at the study site.

关 键 词：ammonia volatilization ANDOSOL Costa Rica field trial gaseous N loss greenhouse gas emission UREA 

分 类 号：S812[农业科学—草业科学]