Effects of the nitrification inhibitor nitrapyrin and the plant growth regulator gibberellic acid on yield-scale nitrous oxide emission in maize fields under hot climatic conditions

作     者：Khadim DAWAR Kamil SARDAR Mohammad ZAMAN Christoph MÜLLER Alberto SANZ-COBENA Aamir KHAN Azam BORZOUEI Ana Gabriela PÉREZ-CASTILLO Khadim DAWAR;Kamil SARDAR;Mohammad ZAMAN;Christoph MüLLER;Alberto SANZ-COBENA;Aamir KHAN;Azam BORZOUEI;Ana Gabriela PéREZ-CASTILLO

作者机构：Department of Soil and Environmental ScienceUniversity of Agriculture PeshawarPeshawa 25000(Pakistan) Soil and Water Management&Crop NutritionJoint FAO/IAEA Division of Nuclear Techniques in Food&AgricultureP.O.Box 100Vienna A-1400(Austria) Institute of Plant EcologyJustus Liebig UniversityHeinrich-Buff-Ring 26Giessen D-35392(Germany) School of Biology and Environmental ScienceUniversity College DublinBelfieldD04 V1W8(Ireland) Management of Environment and Agricultural Risks(CEIGRAM)ETSIAABUniversidad Poliécnica de MadridMadrid 28040(Spain) Agricultural Research SchoolNuclear Science and Technology Research InstituteP.O.Box 31465/1498Karaj(Iran) Environmental Pollution Research Center(CICA)University of Costa RicaMontes de Oca 11501(Costa Rica) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2021年第31卷第2期

页      面：323-331页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：funded by the International Atomic Energy Agency through a Coordinated Research Project(CRP D1.50.16)“Minimizing Farming Impacts on Climate Change by Enhancing Carbon and Nitrogen Capture and Storage in Agro-Ecosystems”(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 

主　　题：fertilizer use efficiency greenhouse gas emission mitigation N response efficiency N uptake efficiency N_(2)O flux plant growth hormone urea 

摘      要：Nitrification inhibitors are widely used in agriculture to mitigate nitrous oxide(N_(2)O)emission and increase crop ***,no concrete information on their mitigation of N_(2)O emission is available under soil and environmental conditions as in Pakistan.A field experiment was established using a silt clay loam soil from Peshawar,Pakistan,to study the effect of urea applied in combination with a nitrification inhibitor,nitrapyrin(2-chloro-6-tri-chloromethyl pyridine),and/or a plant growth regulator,gibberellic acid(GA_3),on N_(2)O emission and the nitrogen(N)uptake efficiency of *** experimental design was a randomized complete block with five treatments in four replicates:control with no N(CK),urea(200 kg N ha^(-1))alone,urea in combination with nitrapyrin(700 g ha^(-1)),urea in combination with GA_3(60 g ha^(-1)),and urea in combination with nitrapyrin and GA_*** N_(2)O emission,yield,N response efficiency,and total N uptake were measured during the experimental *** treatment with urea and nitrapyrin reduced total N_(2)O emission by 39%–43%and decreased yield-scaled N_(2)O emission by 47%–52%,relative to the treatment with urea *** maize plant biomass,grain yield,and total N uptake increased significantly by 23%,17%,and 15%,respectively,in the treatment with urea and nitrapyrin,relative to the treatment with urea alone,which was possibly due to N saving,lower N loss,and increased N uptake in the form of ammonium;they were further enhanced in the treatment with urea,nitrapyrin,and GA_3 by 27%,36%,and 25%,respectively,probably because of the stimulating effect of GA_3 on plant growth and development and the reduction in biotic and abiotic *** results suggest that applying urea in combination with nitrapyrin and GA_3 has the potential to mitigate N_(2)O emission,improve N response efficiency,and increase maize yield.