在武威黄羊镇和兰州永登地区,以20个紫花苜蓿不同品种作为研究对象,连续两年对其在初花期的干草产量、株高、茎叶比、鲜干比、粗蛋白、酸性洗涤纤维、中性洗涤纤维、粗灰分、粗脂肪含量进行测定分析,并采用灰色关联度法进行综合评价.结果表明,“皇后”在黄羊镇和永登地区干草产量均为最高,分别为8.15和7.78 t/hm2;“甘农4号”在黄羊镇地区株高最高(102.44 cm),“驯鹿”在永登地区株高最高(96.44 cm);“陇东苜蓿”在黄羊镇地区粗蛋白含量最高(18.08％),“陇中苜蓿”在永登地区最高(17.91％);“苜蓿王”在黄羊镇地区酸性洗涤纤维含量最低(31.19％),而“太阳神”、“柏拉图”在永登地区并列最低(33.99％);“苜蓿王”在黄羊镇地区中性洗涤纤维含量最低(39.08％),“北极星”在永登地区最低(42.96％).综合分析结果显示,“苜蓿王”、“甘农4号”、“陇东苜蓿”、“北极星”在黄羊镇地区综合表现优异;永登地区“柏拉图”、“皇后”、“苜蓿王”、“北极星”综合表现优异,这些品种在上述各地区分别具有较高的推广利用价值.%Twenty alfalfa (Medicago sativa) varieties were used as research materials in Huangyang and Yongdeng.The hay yield,plant height,stem/leaf and fresh/dry ratios,crude protein,acid detergent fiber,neutral detergent fiber,crude ash and ether extract content of the early bloom alfalfa were measured in two consecutive years,and comprehensive evaluations were conducted using grey relational analysis.The results showed that the hay yields of M.sativa cv Alfaqueen was the highest in both Huangyang and Yongdeng at 8.15 and 7.78 t/ ha respectively.In Huangyang,M.sativa cv Gannong No.4 showed the highest plant height (102.44 cm),while in Yongdeng M.sativa cv AC Caribou was the highest (96.44 cm).In Huangyang,M.sativa cv Longdong had the highest crude protein (18.08％),but in Yongdeng M.sativa cv Longzhong showed the most crude protein content (17.91％).M.sativa cv Alfaking had the lowest acid detergent fiber content in Huangyang (31.19℃),while in Yongdeng and M.sativa cv Sun-god,M.sativa cv Pltao tied for the lowest scores (33.99％).In Huangyang,neutral detergent fiber content of M.sativa cv Alfaking was the lowest (39.08℃),while M.sativa cv Polaris was the lowest in Yongdeng (42.96％).The evaluation results showed that M.sativa cv Alfaking,M.sativa cv Gannong No.4,M.sativa cv Longdong,and M.sativa cv Polaris performed excellently in the Huangyang,while M.sativa cv Pltao,M.sativa cv Alfaqueen,M.sativa cv Alfaking and M.sativa cv Polaris performed excellently in Yongdeng.The use of these varieties deserves extension in each of these areas.
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