Abstract: In order to screen suitable silage maize varieties for spreading and application in Eastern and Western Hunan,the six agronomic trait indexes of eight silage maize varieties from the Xiangdong Experimental Station and Xiangxi Experimental Station were comprehensively evaluated using the grey relational degree. The results showed that the plant height,ear height,fresh yield and hay yield (217.49 cm,113.71 cm,56.10 and 18.59 t·hm^-2) of 'Xianyu 30T60' were the highest among the silage maize varieties,and the leaf number (10.49 piece of per plant) was the most,while the lodging rate (0.37%) was the lowest. The stem diameter (20.12 mm) of 'Tunyu 7969' was the highest,and the empty bar rate (0.67%) of 'Tunyu 899' was the lowest. The plant height,ear height,fresh yield and hay yield of 'Xianyu 30T60' were the highest at the Xiangxi Experimental Station between the interaction of varieties and experimental sites,and the leaf number was the most,while the lodging rate was the lowest. The stem diameter of 'Tunyu 7969' was the highest at the Xiangxi Experimental Station,and the empty bar rate of 'Tunyu 899' was the lowest at the Xiangdong Experimental Station. The plant height,stem diameter,ear height,fresh yield and hay yield were higher at the Xiangxi Experimental Station,and the leaf number was more,while the lodging rate and empty bar rate were lower. Comprehensive evaluation showed that 'Xianyu 30T60' had the best performance and 'Tunyu 168' had better performance,which could be therefore recommended as suitable varieties to be planted more widely in the eastern and western regions of Hunan Province.

Key words: Silage maize, Grey relational degree, Agronomic traits, Production performance

摘要： 为筛选出适合在湖南东西部地区推广应用的青贮玉米(Zea mays L.)品种,本试验利用灰色关联度法对湘东试验站和湘西试验站8个青贮玉米品种的6个农艺性状指标进行综合评价。结果表明:不同品种间'先玉30T60'的株高、叶片数、穗位高、鲜草和干草产量(217.49 cm、10.49片·株^-1、113.71 cm、56.10和18.59 t·hm^-2)均最高,而倒伏率(0.37%)最低,'屯玉7969'的茎粗(20.12 mm)最高,'屯玉899'的空杆率(0.67%)最低;试点×品种互作间湘西试验站的'先玉30T60'株高、叶片数、穗位高、鲜草和干草产量均最高,而倒伏率最低,湘西试验站的'屯玉7969'茎粗最高,湘东试验站的'屯玉899'空杆率最低;不同试验点间湘西试验站的株高、茎粗、叶片数、穗位高、鲜草和干草产量均较高,而倒伏率和空杆率均较低。综合评价结果显示,'先玉30T60'表现最优,生产性能最好,'屯玉168'表现较优,生产性能较好,适宜在湖南东西部地区推广应用。

关键词: 青贮玉米, 灰色关联度法, 农艺性状, 生产性能