【摘要】 为了筛选出适宜热带亚热带地区种植的苜蓿优良品种，在干热河谷区元谋，采用方差分析方法和灰色关联度分析方法，对2017年引进的8个紫花苜蓿品种进行生产性能和营养价值研究。结果表明：（1）参试的8个紫花苜蓿，在本区均能安全越冬，正常生长，生育期205～215 d。（2）株高最高的品种为WL525HQ，达到70.20 cm，与维多利亚、德钦、赛迪7号和WL712HQ品种有显著差异（P<0.05）。一级分枝数最高的品种为WL656品种，为27.20枝，WL712HQ和G8品种间有显著差异（P<0.05）。茎叶比最高的品种为WL712HQ品种，为1.10，与德钦和赛迪7号品种间有显著差异（P<0.05）。年均干草产量最高的是赛迪7号紫花苜蓿，显著高于德钦品种（P<0.05）,2018年、2019年、2020年和三年的平均产量分别为34217.40 kg/hm2、32527.55 kg/hm2、22024.93 kg/hm2和29589.96 kg/hm2，所有参试材料在2018年和2020年每年可刈割8次，2019年为9次。（3）5号品种粗蛋白和全磷含量显著高于其他品种（P<0.05），分别为21.43%和0.25%。WL903品种粗纤维含量显著高于其他品种（P<0.05），含量为23.51%。（4）经灰色关联度分析，8个紫花苜蓿品种排名前3的为赛迪7号、WL525HQ、维多利亚。综上，赛迪7号、‘WL-525HQ’、维多利亚表现较好，可在干热河谷区大面积推广应用。更多还原

【Abstract】 This study aimed to select suitable alfalfa varieties for cultivation in tropical and subtropical areas. The production performance and nutritional value of eight alfalfa(Medicago sativa) varieties introduced in 2017 were evaluated in the hot-arid zone in Yuanmou area using variance and grey relational analyses. The results showed as follows:(1) All test alfalfa varieties grew well and could withstand winter, with a growth period ranging from 205 to 215 d.(2) WL525HQ had the highest plant height compared to Victoria, Deqin, Sadie 7, and WL712HQ(P<0. 05), reaching 70. 20 cm. WL656 had the highest primary branch number, with 27. 20 branches. While the primary branch number of WL712HQ was significantly different from that of G8(P<0. 05). Furthermore, WL712HQ had the highest stem-leaf ratio compared to Deqin and Sadie 7, with a value of 1. 10. Sadie 7 had the highest annual hay yield, which was significantly higher than that of Deqin(P<0. 05). The annual hay yield of Sadie 7 in 2018, 2019, 2020, and over three years was 34217. 40 kg/hm2, 32527. 55 kg/hm2, 22024. 93 kg/hm2, and 29589. 96 kg/hm2, respectively. All test alfalfa varieties can be mowed 8 times per year in 2018 and 2020, and nine times in 2019.(3) The protein and total phosphorus contents of Deqin were significantly than those of other varieties(P<0. 05), with values of 21. 43% and 0. 25%, respectively. The crude fiber content of WL903 was significantly higher than that of other varieties(P<0. 05), with a value of 23. 51%.(4) Through grey relational analysis, the top 3 of the 8 alfalfa varieties was Sadie 7, WL525HQ, Victoria. These findings indicate that these three varieties are suitable for planting in the hot-arid zone areas.更多还原