Effects of nitrogen application rates and irrigation regimes on grain yield and water use efficiency of maize under alternate partial rootzone irrigation

作     者：QI Dong-liang HU Tian-tian SONG Xue QI Dong-liang;HU Tian-tian;SONG Xue

作者机构：Engineering Research Center of Ecology and Agricultural Use of WetlandMinistry of EducationYangtze UniversityJingzhou 434025P.R.China Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of EducationNorthwest A&F UniversityYangling 712100P.R.China 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2020年第19卷第11期

页      面：2792-2806页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：The study was funded by the National Natural Science Foundation of China(51809006 and 51079124) 

主　　题：deficit irrigation nitrogen fertilization leaf area index net photosynthetic rate harvest index Zea mays 

摘      要：Faced with the scarcity of water resources and irrational fertilizer use,it is critical to supply plants with water and fertilizer in a coordinated pattern to improve yield with high water use efficiency(WUE).One such method,alternate partial root-zone irrigation(APRI),has been practiced worldwide,but there is limited information on the performance of different irrigation regimes and nitrogen(N)rates under *** objectives of this study were to investigate the effects of varying irrigation regimes and N rates on shoot growth,grain yield and WUE of maize(Zea mays L.)grown under APRI in the Hexi Corridor area of Northwest China in 2014 and *** three N rates were 100,200 and 300 kg N ha–1,designated N1,N2 and N3,*** three irrigation regimes of 45–50%,60–65%and 75–80%field capacity(FC)throughout the maize growing season,designated W1,W2 and W3,respectively,were applied in combination with each N *** results showed that W2 and W3 significantly increased the plant height,stem diameter,crop growth rate,chlorophyll SPAD value,net photosynthetic rate(Pn),biomass,grain yield,ears per ha,kernels per cob,1000-kernel weight,harvest index,evapotranspiration and leaf area index(LAI)compared to W1 at each N *** N2 and N3 treatments increased those parameters compared to N1 in each irrigation *** the N rate from the N2 to N3 resulted in increased biomass and grain yield under W3 while it had no impact on those under the W1 and W2 *** W3 N3 and W2 N2 and W2 N3 treatments achieved the greatest and the second-greatest biomass and grain yield,*** the N rate significantly enhanced the maximum LAI(LAI at the silking stage)and Pn under W3,suggesting that the interaction of irrigation and fertilizer N management can effectively improve leaf growth and development,and consequently provide high biomass and grain yield of *** W2 N2,W2 N3 and W3 N3 treatments attained the greatest WUE among all the treatments.T