A new wavy-canopy architecture shaped by interlaced application of EDAH increases maize yield and lodging resistance at high density  

作　　者：Bo Hong Cheng Huang Zhen-Yuan Chen Hui-Min Chen Jing Wang Xin Liu Zhi-Wei Wang Yi-Hsuan Lin Xian-Min Chen Si Shen Xiao-Gui Liang Shun-Li Zhou 

机构地区：[1]State Key Laboratory of Maize Bio-breeding,College of Agronomy&Biotechnology,China Agricultural University,Beijing 100193,China [2]Ministry of Education Key Laboratory of Crop Physiology,Ecology and Genetic Breeding,Jiangxi Agricultural University,Nanchang 330045,Jiangxi,China [3]Innovation Center of Agricultural Technology for Lowland Plain of Hebei,Wuqiao 061802,Hebei,China

出　　处：《The Crop Journal》2025年第2期536-544,共9页作物学报(英文版)

基　　金：supported by the National Key Research and Development Program of China(2023YFD2303302,2022YFD2300803);the National Natural Science Foundation of China(32160445);the China Agriculture Research System of MOF and MARA(CARS-02-16).

摘　　要：High-density planting increases maize yield but also canopy crowding and stalk lodging.Aiming this contradiction,a wavy canopy was created using interlaced chemical application(IC)of a plant growth retardant at the V14 stage with three densities(60,000,75,000,and 90,000 plants ha-1,indicated by D1,D2,and D3,respectively)for two seasons.The results showed that the IC-treated wavy canopy featuring both natural height(IC-H)and dwarfed(IC-L)plants,improved light transmission by 8.54%,8.49%,and 16.49%on average than the corresponding controls(CK)at D1,D2,and D3,respectively.The alleviation of canopy crowding stimulated leaf photosynthesis,sugar availability,basal-internode strength,and decreased plant lodging ratios in both IC-H and IC-L,particularly under higher densities.Meanwhile,the IC populations produced significantly higher yield than CK,with an average increase of 3.38%,16.70%,and 15.28%at D1,D2,and D3,respectively.Collectively,this study proposed a new wavy canopy strategy using plant growth retardant to simultaneously increase yield performance and lodging resistance,thus offering a sustainable solution for further development of high-density maize production.

关 键 词：High density Wavy canopy architecture Light intensity Lodging resistance Maize yield 

分 类 号：S513[农业科学—作物学]