中国生态农业学报（中英文）2025，Vol.33Issue(4)：723-736,14.DOI:10.12357/cjea.20240350
夏玉米不同阶段及类型倒伏对籽粒灌浆及产量的影响
Effect of stage and type of lodging on grain filling and yield of summer maize
摘要
Abstract
Lodging is a crucial factor affecting the yield of summer maize.To study the effects of different stages and types of lodging on the grain filling and yield of summer maize,this study selected two varieties,'Zhengdan 1002'(sparsely planted with large ears)and'Yudan 9553'(densely planted with small ears),and conducted a field control experiment at four key growth stages(E1:big trumpet stage;E2:flowering stage;E3:grain formation stage;and E4:middle grain filling stage)with three types of lodging(EQ:mild root lodging;EZ:severe root lodging;and EJ:stem loading).Using a Logistic curve to simulate the dynamics of grain filling.The study analyzed changes in the duration and rate of grain filling during the gradual increase phase,rapid increase phase,and slow increase phase,and quantitatively assessed the yield loss due to different lodging treatments.The Logistic simulation fit the grain-filling dynamics of summer maize well,with a determination coefficient of over 0.98.Post-lodging,significant reductions in the theoretical maximum 100-grain weight(K value)were observed at E3 and E4 stages,with'Zhengdan 1002'experiencing greater re-ductions than'Yudan 9553'.In particular,K values significantly decreased by 8.8％-16.5％(EZ)and 15.4％-22.3％(EJ)during E3 and 6.0％-16.0％(EZ)and 14.9％-18.8％(EJ)during E4.Excluding the E1 stage,the average grain filling rate(Gavg),maximum grain filling rate(Gmax),and grain mass at maximum filling rate(Wmax)were significantly affected,with average filling rates of'Zhengdan 1002'decreasing less than those of'Yudan 9553'.Specifically,the average filling rates decreased by 10.5％-11.8％(EZ)and 12.4％-14.6％(EJ)during E2,18.0％-18.1％(EZ)and 17.6％-21.2％(EJ)during E3,and 13.6％-16.6％(EZ)and 14.1％-23.0％(EJ)during E4.The durations of the three grain-filling phases under lodging treatments at different stages were not significantly different from those of the control but a decline in the filling rate was evident,particularly during the rapid and slow increase phase.Post-lodging,grain filling rates during the rapid and slow increase phase significantly decreased in the E1 stage after EJ and in the E2,E3,and E4 stages after EJ and EZ.Mild root lodging had no significant impact on grain-filling rates.Analysis of post-lodging yield changes showed that the E2,E3,and E4 stages had a greater impact on yield,with average reductions of 18.2％-21.1％('Zhengdan 1002')and 21.1％-24.0％('Yudan 9553'),whereas EJ resulted in the highest yield reduction,followed by EZ.Lodging had a greater impact on'Yudan 9553'than on'Zhengdan 1002'.In summary,lodging during the middle and late stages of summer maize growth significantly reduces the grain-filling rate and mainly affects the filling rate during the rapid and slow growth periods.Lodging signi-ficantly reduces yield,especially for densely planted spikelet-type varieties,such as'Yudan 9553'.关键词
倒伏/籽粒灌浆/Logistics模拟/夏玉米Key words
lodging/grain filling/Logistics simulation/summer maize分类
农业工程引用本文复制引用
李树岩,杨光仙,余卫东,薛昌颖,魏庆伟,周佳布,侯英雨..夏玉米不同阶段及类型倒伏对籽粒灌浆及产量的影响[J].中国生态农业学报（中英文）,2025,33(4):723-736,14.基金项目
河南省自然科学基金项目(202300410530)和河南省科技攻关项目(212102110240)资助 This study was supported by the Henan Provincial Natural Science Foundation Project(202300410530)and Henan Provincial Science and Techno-logy Research Project(212102110240). （202300410530）
