品种与种植密度对榆阳地区青贮玉米引种试验的影响

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中图分类号：S548；S513 文献标识码：A 文章编号：1007-0435（2025）12-4152-10

引用格式：，等.品种与种植密度对榆阳地区青贮玉米引种试验的影响[J].草地学报，2025，33（12）： 152—161 XU Xin-xin，WANG Lian-jun，YANG Jun-wei，etal.Efects of VarietyandPlanting Densityonthe Introduction Experiment of Silage Corn in Yuyang Area[J].Acta Agrestia Sinica，2025，33（12） ：152-161

Effects of Variety and Planting Density on the Introduction Experiment of Silage Corn in Yuyang Area

XU Xin-xin1， WANG Lian-jun2， YANG Jun-wei³， YE Mao-mao²，WANG Lei3， ZHANG Cai-ping4， MA Xi-qingl* （1.CollgefdehicuralUesitye；astrctFd landEcologicastratioteofliCityuliniroceoha;3ugstriasadtaiity Yulin，ShaanxiProvince790oo，China;4.ShaanxiEarthSeedInustry（group）Co.Ltd，Yulin，ShanxiProvince7190，China）

Abstract：Toaddress the critical challenges of poor varietal adaptability，insufficient understandingof yieldquality synergies in maize cultivars，and limited suitable silage maize（Zea mays） varieties for Yuyang aeolian sandy grasland，this study systematicall evaluated 12 specialized silage and dual-purpose（grain-silage） maize cultivars through a two-factor experimental design（l2 cultivars ×2 plantingdensities）.Multivariate analysis integrating grey relational analysis was conducted on 1l key parameters encompasing agronomic traits，biomass yield，and nutritional quality.Results demonstrated that：cultivar significantly influenced agronomic traits，biomass production （ ⋅P<0.05） ，and nutritional profiles，whereas planting density primarily affected plant height and stem diameter；interactive effects between cultivar and density were observed in plant height， stem diameter，functional leaf number，and fresh weight；‘Jingjiu Silage 16∘ and‘Jingke 932’achieved superior fresh biomass yields （57. 96 and 57.91t⋅hm-2 ，respectively），with‘Jingke 932’showing optimal comprehensive performance under high-density cultivation 8.25×104plants⋅hm-2， and‘Kehe 699’excelling under low-density conditions （6.75×104plants⋅hm-2） . These cultivars are recommended for demonstration and pro motion in the target region. This study provides valuable insights for optimizing silage maize production systems to reduce livestock feding costs，facilitate large-scale animal husbandry，and support regional agricultural restructuring.

Key Words：Silage corn; Varietal adaptability;Planting density;Gray relational analysis;Agro-pastoral ecotone

青贮玉米（Zeamays）因其高生物产量和营养均衡等特性，是优质青贮饲料的主要原料，对畜牧业可持续发展至关重要[1]。（剩余14257字）