不同扁蓿豆种质在甘肃天祝高寒地区的农艺性状表现

Agronomic traits of different Medicago ruthenica germplasms in the Tianzhu alpine region of Gansu Province

为筛选适宜在高寒区种植的扁蓿豆(Medicago ruthenica)的种质,在甘肃省天祝高寒区种植了23份扁蓿豆种质,对其农艺性状进行了综合分析。结果表明,供试扁蓿豆种质中自然高度最高的为景泰(27.7cm),最低的为会宁(6.0cm),绝对高度最高和最低的分别为蒙99-102(47.4cm)、B-509(26.7cm)与渭源(26.7cm);单株产量以中畜545种质的最高,为2.57g,渭源的最小,为0.62g;单株地下生物量较高的是中畜545种质(1.32g)、镇原(1.31g)、蒙99-10(1.32g),最低的是渭源(0.52g);粗蛋白含量较高的是会宁(15.81%)和永昌-2(15.76%),Q8508扁蓿豆种质含量最低,为10.02%;酸性洗涤纤维含量最高的是土默特35.16%,最低的是会宁(21.24%);榆中的中性洗涤纤维含量最高,为43.07%,会宁最低,为26.83%。根据灰色关联度分析,蒙99-10和中畜545扁蓿豆种质综合表现最佳,宁县扁蓿豆种质次之;景泰扁蓿豆的直立性在所有参试种质中表现最好,会宁在参试的23份种质中排名第8,但在营养指标方面表现良好;渭源和Q8508种质相对其他种质来说表现最差。

To provide a foundation for planting and selecting seed of Medicago ruthenica in alpine areas,the agronomic traits of 23 M.ruthenica resources were studied.The results showed that the sample Jingtai had the tallest natural height(27.7 cm),while Huining had the shortest height(6.0 cm).The highest and lowest absolute heights were observed for Meng99-102(47.4 cm),B-509(26.7 cm),and Weiyuan(26.7 cm).For yield per plant,Zhongxu545 showed the largest value of 2.57 g per plant,while Weiyuan showed the lowest value of 0.62 g per plant.Zhongxu545 showed the highest underground biomass(1.32 g),followed by Zhenyuan(1.31 g)and Meng99-102(1.32 g),while the lowest value was observed for Weiyuan(0.52 g).Regarding nutrition,Huining and Yongchang-2 showed the highest crude protein content of 15.81%and 15.76%,while Q8508 M.ruthenica showed the lowest crude protein content(10.02%).The highest acid detergent fiber(ADF)was observed for Tumote(35.16%),while the lowest one was observed for Huining(21.24%).Yuzhong showed the highest neutral detergent fiber(NDF)(43.07%),while Huining again showed the lowest value(26.83%).Integrated analysis revealed that the Meng99-10 and Zhongxu545 germplasms of M.ruthenica showed the best performance,followed by Ningxian;the erectness of Jingtai was the best in all tested germplasms.Huining ranked the 8th in all 23 tested germplasms and showed a good value for nutrition index.The Weiyuan and Q8508 M.ruthenica germplasms showed relatively lower performance among all the tested germplasms.