A plant's foliar uptake of dew can mitigate the adverse effects caused by drought stress. However, in grassland ecosystems, it is inconclusive whether the dew condensation characteristics of plants at different heights are consistent. In this study, we wanted to know whether plant height had a significant effect on the formation of dew. In addition, we wanted to understand the difference of dew formation between C₃ plant Leymus chinensis (LC) and C₄ plant Cleistogenes squarrosa (CS) which have different heights and can succeed each other in the community. In nine dew nights, we measured the amount of dew formed on simulated condensation surface (different heights) and two plants at the same time. The results showed that in the height range of 5–80 cm, the dew amount increases with the canopy height, but its increase rate gradually slows down and approaches zero. The shorter CS (5–15 cm) has a similar dew amount (0.095 mm) as LC (40–70 cm) due to its compact structure of the leaves with pubescence and the more stable micro-meteorological conditions. The CS can obtain more potential dew per unit organic matter, and this may be one of the potential mechanisms for the succession from LC communities to CS communities under drought stress.

植物对露叶的吸收可以减轻干旱胁迫造成的不利影响。但是，在草原生态系统中，不同高度植物的露水凝结特性是否一致尚无定论。在这项研究中，我们想知道植物高度是否对露水的形成有显着影响。此外，我们想了解C ₃植物羊草（Leymus chinensis（LC））和C ₄植物Cleistogenes squarrosa结露的差异。（CS）具有不同的身高，并且可以在社区中相互继承。在九个露水的夜晚，我们同时测量了在模拟冷凝表面（不同高度）和两棵植物上形成的露水量。结果表明，在5–80 cm的高度范围内，露水量随冠层高度的增加而增加，但其增加速率逐渐减慢并趋近于零。较短的CS（5–15 cm）具有与LC（40–70 cm）相似的露水量（0.095 mm），这是因为其紧凑的叶片结构具有短柔毛和更稳定的微气象条件。CS可以获得每单位有机质更多的潜在露水，这可能是干旱胁迫下LC群落向CS群落演替的潜在机制之一。