华北农学报2025，Vol.40Issue(2)：56-66,11.DOI:10.7668/hbnxb.20195270
植物生长调节剂对密植春玉米冠层-根系的协同调控特性及抗倒效应
Synergistic Regulation Characteristics and Lodging Resistant Effect of Plant Growth Regulators on Canopy-Root of Spring Maize
摘要
Abstract
In order to study the synergistic regulation characteristics of plant growth regulators on canopy-root traits of spring maize and to further reveal the lodging resistant mechanism of the plants,in 2021-2022,with the maize varieties Dika 159(DK159)and Xianyu 335(XY335)as experimental materials,at two planting densities of 75 000,90 000 plants/ha,plant growth regulator treatment(PGR)and water control(CK)were set up to analyze and com-pare the canopy structure,stem basel internode characters,root morphological characteristics and physicochemical properties of root bleeding sap under different treatments.The results showed that PGR had regulatory effects on both the maize canopy and roots.After PGR treatment,plant height,ear height and center of gravity height de-creased,the mean leaf tilt angle above ear increased,light transmittance of ear layer increased by 23.59％on average,light transmittance of basel layer increased by 18.60％on average,and stem quality of basal internode was significantly improved.At the same time,the total root number,root length and root dry weight of PGR treatment increased,the root width at 10 cm below the surface increased,the root bleeding sap flow and nutrient flow increased,and the root morpho-logical characteristics and transport capacity were obviously optimized.The flow of CTK and IAA in the root bleeding sap increased,while the flow of GA decreased.PGR effectively reduced the occurrence of stem lodging and root lodging through the synergistic regulation of canopy and root system,the field lodging rate of maize decreased from 13.43％to 6.47％,and the average yield of maize increased by 16.10％,thus achieving stable and high yield.关键词
玉米/植物生长调节剂/密植/冠层/根系/倒伏Key words
Maize/Plant growth regulator/High density/Canopy/Root/Lodging分类
农业科学引用本文复制引用
孙宁,赵洪祥,边少锋,闫伟平,徐晨,陈喜凤,宋杭霖,李斐,张丽华,谭国波..植物生长调节剂对密植春玉米冠层-根系的协同调控特性及抗倒效应[J].华北农学报,2025,40(2):56-66,11.基金项目
吉林省教育厅科学技术研究项目(JJKH20230398KJ) （JJKH20230398KJ）
国家重点研发计划项目(2023YFD230170102) （2023YFD230170102）
吉林省科技发展计划项目(20230101227JC) （20230101227JC）
