Abstract: The effects of irrigation and planting density on the seed yield and its components of Astragalus adsurgens Pall were studied in this paper.The results show that the irrigation models significantly affected seed yield and its components when the total irrigation amount was same.At blooming stage with one-time irrigation of 900 m3/hm²,the potential and realized seed yield were 1611.1 kg/hm² and 333 kg/hm² and 105.7% and 73.1% higher than those of CK(no irrigation),respectively.Separate irrigation of 450 m3/hm² at bud stage and blooming stage led to the potential seed yield of 1353.6 kg/hm² and realized seed yield of 258.2 kg/hm² which were 72.9% and 34.2% higher than CK,respectively.The potential seed yield and realized seed yield under treatment of inter-plant spacing of 1.0 m reached to 1022.4 kg/hm² and 269.8 kg/hm² and were 42.5% and 52.6% higher than those(717.4 kg/hm² and 176.8 kg/hm²) of the 1.5 m treatment,respectively.The potential seed yield under treatment of row spacing at 115 cm reached to 1657.4 kg/hm² and were 26.5% and 43.8% higher than 1310.6 kg/hm² of row spacing at 75 cm and 1152.4 kg/hm² of row spacing at 90 cm,respectively.The realized seed yield under treatment of row spacing at 115 cm reached to 337.2 kg/hm² and were 6.6% and 50.9% higher than 316.2 kg/hm² of row spacing at 75 cm and 223.4 kg/hm² of row spacing at 90 cm,respectively.

Key words: Astragalus adsurgens Pall, Seed yield components, Seed yield, Irrigation, Planting density

摘要： 研究灌溉时间和灌溉比例对沙打旺(Astragalus adsurgens)种子产量及其构成因素的影响。结果表明:在灌溉总量相同的情况下,灌溉方式对沙打旺种子产量构成因素及实际种子产量的影响较大;开花期灌溉900m³/hm²,潜在种子产量和实际种子产量分别为1611.1与333kg/hm²,比对照(CK)分别提高105.7%和73.1%;在现蕾期和开花期灌溉450 m3/hm²,潜在种子产量和实际种子产量分别为1353.6和258.2kg/hm²,比CK提高72.9%和34.2%;穴栽行株距1.0 m,潜在种子产量达1022.4kg/hm²,实际种子产量为269.8 kg/hm²,比行株距1.5m(717.4和176.8 kg/hm²)分别提高42.5%和52.6%;条播中,行距115cm,潜在种子产量达1657.4kg/hm²,与行距75cm(1310.6kg/hm²)和90cm(1152.4 kg/hm²)相比,分别提高26.5%和43.8%,而行距115cm,实际种子产量为337.2kg/hm²,与行距75cm(316.2 kg/hm²)和90cm(223.4kg/hm²)相比,分别提高6.6%和50.9%。

关键词: 沙打旺, 种子产量因素, 种子产量, 灌溉, 密度