关键词: 饲草燕麦, 生产性能, 营养品质, 综合评价

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