通过筛选符合甘肃红芪种植区的最佳种苗规格，保证高质量品种的选育，提高药材安全性和有效性，为甘肃红芪高效栽培提供参考。以4种大小不同的红芪种苗为材料，研究种苗大小对红芪生长指标及产量的影响。结果表明，红芪地上部分和地下部分等关键生长指标均以红芪大苗最佳，其中单株根鲜重25.34 g/株，折合鲜产量9 255.6 kg/hm2；叶部白粉病的发病率最低，为30%；根部根腐病的发病率较低，为40%。表明在红芪栽培过程中可优先选择主根长为35.0～40.0 cm、平均芦头粗为8.0 mm左右、单株鲜根重≥3.6 g/株的红芪大苗，有助于生长发育及提高产量，植株发病率较低，抗旱性较强。

By selecting the optimal seedling specifications suitable for Gansu's Hedysarum polybotrys planting areas, this study was set to ensure the selection of high-quality varieties, improve the safety and efficacy of medicinal materials, and provide a scientific reference for efficient cultivation of Hedysarum polybotrys in Gansu. 4 different seedling sizes of Hedysarum polybotrys were used as materials to study the effect of seedling size on growth indexes and yield. The results showed that key growth indexes, such as above-ground and below-ground mass, were optimal for large seedlings of Hedysarum polybotrys. The fresh root weight per plant was 25.34 g/plant, with a fresh yield of 9 255.6 kg/ha. The incidence of powdery mildew on leaves was lowest at 30%, and root rot incidence was lower at 40%. It indicates that in the cultivation of Hedysarum polybotrys, large seedlings with a primary root length of 35.0 to 40.0 cm, an average root crown diameter of 8.0 mm, and a fresh root weight per plant≥3.6 g/plant should be preferred to promote growth and yield, reduce disease incidence, and enhance drought resistance.

S567.2

甘肃省科技重大专项(22ZD6FA021-1)；定西市科技计划项目(DX2023AZ16)；宕昌县强科技计划项目(2024-005)；定西市科技计划项目(DX2022AR02)。