Abstract: In this study,the yield,quality and feeding performance of 13 forage oat (Avena sativa) cultivars were comprehensively evaluated for three consecutive years,to provide a basis for forage oat breeding in central region of Gansu Province. The results showed that the yield and its constituent characters were significantly affected by the interannual,varietal and interaction between the varieties (P<0.01). The coefficient of variation of grain weight per spike was the largest with a value of 31.21%,and the average variation of leaf number and stem internode number was less than 5%. There were significant differences in the contents of crude protein,acid detergent fiber,neutral detergent fiber,water soluble carbohydrate,relative feeding value,relative forage quality,net energy of lactation and forage grading index among the different varieties;and'Zhangyan 4’had the highest relative feeding value of 126.18 and relative forage quality of 178.99；the forage grading index of 'Baiyan 7’ was the largest with a value of 35.01 MJ·d^-1. The average net energy of lactation of 13 oat varieties was 7.08 MJ·kg^-1,which reached the standard as super grade grass forage. Based on the correlation analysis between yield and quality,a linear evaluation function model was established on the basis of principal component analysis. It was concluded that'Longyan 3’'Bayyan 6’'Dingyan 2’'Zhangyan 4’and'Baiyan 7’had stable yield and outstanding feeding performance,which were suitable for popularly application.

Key words: Forage oats, Production performance, Nutritional quality, Comprehensive evaluation

摘要： 本研究以13个饲草燕麦(Avena sativa)品种为材料，连续3年进行产量、品质及饲喂性能综合评价，为甘肃中部地区饲草燕麦育种提供依据。结果表明：供试燕麦产量及其构成性状受年际、品种及其互作效应影响极显著(P<0.01)，穗粒重变异系数最大，为31.21%，叶片数和茎节数平均变异小于5%；不同品种间粗蛋白、酸性洗涤纤维、中性洗涤纤维、可溶性碳水化合物含量以及相对饲用价值、相对饲草品质、产乳净能与饲草分级指数存在显著差异，'张燕四号’相对饲用价值和相对饲草品质最大，分别为126.18，178.99，'白燕7号’饲草分级指数最大，为35.01 MJ·d^-1，13个燕麦品种产乳净能值平均为7.08 MJ·kg^-1，达到特级饲草标准。结合产量与品质的相关性分析，在主成分分析基础上构建线性评价函数模型，得出'陇燕3号’'坝燕6号’'定燕2号’'张燕四号’与'白燕7号’产量稳定，饲喂性能突出，适宜推广并具有应用潜力。

关键词: 饲草燕麦, 生产性能, 营养品质, 综合评价