The present study aimed to investigate the effect of different shade treatments (0%, 35%, 50% and 75%) on physiological traits and yield attributes of two soybean genotypes namely JS 97‐52 and JS 95‐60. The results clearly showed that plants which were grown under control conditions exhibited the highest values for specific leaf weight, chlorophyll content, leaf thickness and stomatal density, whereas the lowest values were observed in plants subjected to 75% shading. Moreover, a significant reduction in photosynthetic rate, stomatal conductance and electron transport rate was observed with decreased solar radiation. Performance index, fluorescence area, Fv/Fo, Fo/fm, ABS/CSo, DIo/CSo, TRo/CSo and ETo/CSo were also reduced under heavy shade. Seed yield was reduced by 24%, 47% and 62% in JS 97‐52 and by 51%, 82% and 92% in JS 95‐60 under 35%, 50% and 75% shading, respectively, compared to the control conditions. Therefore, to enhance crop productivity under intercropping, the effects of shade should be taken into consideration.

中文翻译：

---

遮荫对大豆叶片解剖结构、光合作用特性和叶绿素荧光的影响 （Glycine max）


本研究旨在探讨不同遮荫处理 （0%、35%、50% 和 75%） 对 JS 97-52 和 JS 95-60 两种大豆基因型的生理性状和产量属性的影响。结果清楚地表明，在对照条件下生长的植物的比叶重、叶绿素含量、叶厚和气孔密度的测量值最高，而在 75% 遮荫下的植物中观察到最低值。此外，在减少太阳辐射的情况下，观察到光合速率、气孔导度和电子传输速率显著降低。在重阴下，性能指标、荧光面积、Fv/Fo、Fo/fm、ABS/CSo、DIo/CSo、TRo/CSo 和 ETo/CSo 也降低。与对照条件相比，在 35%、50% 和 75% 的阴影下，JS 97-52 的种子产量分别降低了 24%、47% 和 62%，JS 95-60 的种子产量分别降低了 51%、82% 和 92%。因此，为了提高间作下的作物生产力，应考虑阴凉的影响。