不同种植密度对玉米新品种郑单5179生长及产量的影响  

Effects of Planting Density on Biological Characters and Yieldof New Maize Variety Zhengdan 5179

作　　者：齐建双[1] 夏来坤[1] 马智艳 丁勇[1] 李春盈 唐保军[1] 张凤启[1] 张君[1] 穆心愿 赵发欣[1] QI Jianshuang;XIA Laikun;MA Zhiyan;DING Yong;LI Chunying;TANG Baojun;ZHANG Fengqi;ZHANG Jun;MU Xinyuan;ZHAO Faxin(Cereal Crops Research Institute,Henan Academy of Agricultural Sciences/Henan International Joint Laboratory on Maize Precision Production,Zhengzhou 450002,China)

机构地区：[1]河南省农业科学院粮食作物研究所/河南省玉米绿色精准生产国际联合实验室,郑州450002

出　　处：《耕作与栽培》2022年第3期24-28,共5页Tillage and Cultivation

基　　金：河南省玉米产业技术体系项目(S 2015-02-G 04);河南省农业科学院自主创新专项基金项目(2021 ZC 10)。

摘　　要：为了充分挖掘新审定品种郑单5179的生产潜力,本研究设置8个密度处理,开展密度对郑单5179的农艺、产量、抗倒伏能力和冠层结构等24个相关性状的研究。结果表明,郑单5179随着种植密度增大,抽雄-吐丝间隔期、空杆率、秃尖、畸形穗、茎基层LAI和穗位层LAI共6个性状指标总体呈增加趋势;穗长、行粒数、单株产量、茎粗、节长、折断力、茎基层DIFN和穗位层DIFN等8个性状指标随着种植密度增加呈下降趋势;而茎基层MTA、穗位层MTA和产量等3个指标则随着密度增加呈先增加再下降趋势,产量在75 000株/hm^(2)时达到最高,株高、穗位高、穗粗、穗行数、轴粗、百粒重和倒伏倒折率之和等7个指标受种植密度增加影响不大。In order to tap the production potential of the newly approved variety Zhengdan 5179 and promote its application. Eight density treatments were set to study the effects of density on 24 related traits such as agronomy, yield, lodging resistance and canopy structure of Zhengdan 5179. The results showed that with the increase of planting density, the six character indexes of tasseling silking interval, empty stem rate, bald tip, deformed panicle, LAI at stem base and LAI at panicle position layer showed an increasing trend. The eight character indexes such as panicle length, grain number per row, yield per plant, stem diameter, node length, breaking force, stem base DIFN and panicle position DIFN decreased with the increase of planting density. The three indexes of stem base MTA, ear layer MTA and yield first increased and then decreased with the increase of density, and the yield reached the highest at 75 000 plants/hm^(2), which was the most suitable density for the variety. Plant height, panicle height, panicle diameter, rows per panicle, axis diameter, 100 grain weight and the sum of lodging and folding rate were not affected by the increase of planting density.

关 键 词：郑单5179 种植密度 生产潜力 适宜密度 

分 类 号：S513.091[农业科学—作物学]