Uniconazole was a plant growth retardant with effect of regulating plant growth and development, however, there were very few studies on its application to mung bean. In this study, the leaves of mung bean were sprayed with uniconazole solution (30 mg·L⁻¹) at V3 stage. Photosynthetic indicators, root distribution were measured at R5 and R6, and yield and components were measured at maturity. Uniconazole increased Gs (stomatal conductance) and Tr (transpiration rate) at R5 and R6, Pn (net photosynthesis rate) at R6, and SPAD value at R5. The SPAD value at R5 had the greatest correlation with yield with a correlation coefficient of 0.684. According to distribution pattern of decreasing root length density from top to bottom, large amounts of water absorbed by the roots was more likely to come from the upper soil layer, especially 0–20 cm soil layer. As the depth of soil layer increased, the proportion of root dry weight in different soil layers were 69, 14, 9, 5 and 3%, respectively. Uniconazole effectively reduced root proportion in 0–20 cm soil layer and increased root proportion in 20–60 cm soil layer. Root dry weight density in 20–40 cm soil layer and yield were significantly positively correlated (r = 0.938* at R5, r = 0.891* at R6). In addition, uniconazole increased hundred grain weight and yield, reduced pods number per plant and seeds number per pod. Based on the results, this study can provide guidance for mung bean production and high-yield breeding in the future.

尤康唑是一种植物生长抑制剂，具有调节植物生长发育的作用，但对其在绿豆上的应用研究甚少。在本研究中，绿豆叶喷洒氟环唑溶液（30 mg·L ^-1) 在 V3 阶段。在 R5 和 R6 测量光合指标、根分布，并在成熟时测量产量和成分。Uniconazole 增加了 R5 和 R6 的 Gs（气孔导度）和 Tr（蒸腾速率），R6 的 Pn（净光合作用速率）和 R5 的 SPAD 值。R5 处的 SPAD 值与产量的相关性最大，相关系数为 0.684。根据根长密度自上而下递减的分布格局，根系吸收的大量水分更可能来自上层土层，尤其是0-20 cm土层。随着土层深度的增加，不同土层中根干重的比例分别为69、14、9、5和3%。尤康唑有效降低了0~20 cm土层的根系比例，增加了20~60 cm土层的根系比例。20~40 cm土层根干重密度与产量呈显着正相关（r  = 0.938* 在 R5，r  = 0.891* 在 R6）。此外，氟环唑增加了百粒重和产量，降低了单株荚数和每荚种子数。研究结果可为今后绿豆生产和高产育种提供指导。