四川农业大学学报2025，Vol.43Issue(5)：1179-1188,10.DOI:10.16036/j.issn.1000-2650.202501628
种植密度对川中丘区夏玉米物质积累及产量的影响
Effects of Planting Density on Matter Accumulation and Yield of Summer Maize in Hilly Area of Central Sichuan
摘要
Abstract
[Objective]This study investigated the effects of planting density on dry matter accumulation and yield of summer maize in the hilly areas of central Sichuan,aiming to provide a scientific basis for high-yield maize cultivation.[Method]Six planting densities were tested:D1(4.50),D2(5.25),D3(6.00),D4(6.75),D5(7.50)and D6(8.25)×104 plants/hm2.Plant morphology,leaf area,dry matter accumulation,and yield were systematically measured.[Result]As planting density increased,grain yield first increased and then decreased.The highest yields were observed at densities of 6.00,6.00,and 7.50×104 plants/hm2 inover the three experimental years,reaching 5 263.77,7 167.25,and 6 110.32 kg/hm2,respectively.For every increase of 7 500 plants/hm2,spike length decreased by 1.89％,2.61％,and 2.12％;ear diameter decreased by 0.97％(2015)and 1.10％(2017);and bald tip length increased by 5.04％,14.68％,and 14.04％,respectively.Stem diameter was reduced by 4.07％,3.96％,and 4.19％,while leaf area per plant decreased by 5.43％,5.49％,and 3.87％.In contrast,leaf area index(LAI)increased by 7.60％,6.65％,and 12.16％.Although dry matter accumulation per plant decreased with increasing density,total population dry matter accumulation increased.Correlation analysis revealed that yield was positively correlated with bald tip length,ear diameter,and LAI.Path analysis further indi-cated that effective panicle number was the primary factor influencing yield,followed by 100-grain weight having,with grains per spike the least effect.[Conclusion]Rational close planting at a density of 6.00-7.50×104 plants/hm2 can effectively optimize plant traits and enhance yield in summer maize under local conditions.关键词
种植密度/夏玉米/物质积累/产量/通径分析Key words
planting density/summer maize/material accumulation/yield/path analysis分类
农业科技引用本文复制引用
姚泓倩,霍琪,李小龙,刘学兵,马晓君,蓝天琼,袁继超,孔凡磊..种植密度对川中丘区夏玉米物质积累及产量的影响[J].四川农业大学学报,2025,43(5):1179-1188,10.基金项目
国家重点研发计划(2023YFD230190202) （2023YFD230190202）
国家重点研发计划(2022YFD190160304). （2022YFD190160304）
