为探究盐碱胁迫对兰州百合生长发育及生理活性的影响，本研究设置不同的NaCl-NaHCO₃混合盐碱胁迫浓度，分别为0 mmol/L（CK）、50 mmol/L（T1）、100 mmol/L（T2）和150 mmol/L（T3），测定其在各处理下不同生长时期（幼苗期、现蕾期、开花期、半枯期）株高等生长指标、叶绿素含量等生理指标。结果表明，随盐碱浓度的增加，同一生长期的兰州百合株高、茎粗逐渐降低；随着生长时期的推进，CK处理的叶长增长最为明显；半枯期T1鳞茎纵径为31.55 mm，较CK增加2.80%，T2鳞茎横径为36.32 mm，较CK增加8.78%，T2鳞茎周径为13.77 cm，较CK增加13.46%；随盐碱浓度的增加，各时期的兰州百合叶片SOD活性，幼苗期、现蕾期和半枯期的叶片POD活性呈先升高后降低的趋势，幼苗期、现蕾期、开花期叶绿素含量呈现递减趋势。综上，盐碱胁迫对兰州百合的生长发育具有一定的抑制作用，但适度胁迫（100 mmol/L）有利于鳞茎的增大与生理活性物质的积累。本文为探究兰州百合耐盐碱的生理机制提供参考。

To explore the effects of salt-alkali stress on the growth, development and physiological activities of Lilium davidii var. willmottiae, different NaCl-NaHCO₃ combined stress concentrations were set, with concentration of 0 mmol/L (CK), 50 mmol/L (T1), 100 mmol/L (T2), and 150 mmol/L (T3), respectively. The growth indicators such as plant height and physiological indicators such as chlorophyll content at different growth stages (seedling stage, bud formation stage, flowering stage, semi-dead stage) under various treatments were determined. The results showed that with the increase of salt-alkali concentration, the plant height, stem thickness and leaf length and width of Lilium davidii var. willmottiae in the same growth period gradually decreased. With the extension of the growth period, the leaf length of the CK treatment increased most significantly. The longitudinal diameter of bulbs in the semi-dead stage T1 was 31.55 mm, increasing by 2.80% vs. CK. The transverse diameter of bulbs in T2 was 36.32 mm, increasing by 8.78% vs. CK. The circumdiameter of bulbs in T2 was 13.77 cm, increasing by 13.46% vs. CK. With the increase of salt-alkali concentration, the SOD activity of Lilium davidii var. willmottiae leaves in various periods, the POD activity of leaves at the seedling stage, bud formation stage and semi-dead stage showed a trend of first increasing and then decreasing, and the chlorophyll content at the seedling stage, bud formation stage and flowering stage showed a decreasing trend. In conclusion, salt-alkali stress has a certain inhibitory effect on the growth and development of Lilium davidii var. willmottiae. However, moderate stress (100 mmol/L) was conducive to the enlargement of bulbs and the accumulation of physiologically active substances. This article provides a reference for exploring the physiological mechanism of salt-alkali tolerance of Lilium davidii var. willmottiae.