Soil water capacity (SWC) is a very important factor for the artificial cultivation and production of seedling in Cyclocarya paliurus. To understand SWC requirement for seedling cultivation and to investigate morphological and physiological changes under different SWCs, a 100-day SWC treatment was conducted during artificial cultivation; four treatments were 10–20 wt% SWC (W1), 30–40 wt% SWC (W2), 50–60 wt% SWC (W3), and 70–80 wt% SWC (W4). The result showed that W3 was suitable for seedling cultivation. Compared with W3, growth biomass decreased and water content increased at W1, W2 and W4; K, Ca, and Mg content increased under W1, while Na content increased under W4; SOD, PPO, POD, and CAT activity in leaf significantly increased under W1 and W4, of which SOD activity was the highest, and MDA content reached its maximum under W1. W1 and W4 had negative effects on seedling growth, and seedlings adapt to unfavorable water condition by morphological and physiological responses. Our research would be useful for artificial cultivation and management of Cyclocarya species.

中文翻译：

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不同土壤持水量下青钱树的形态和生理变化。

土壤水分容量（SWC）是青金车人工栽培和生产幼苗的一个非常重要的因素. 为了解苗木栽培对 SWC 的要求并研究不同 SWC 下的形态和生理变化，在人工栽培过程中进行了 100 天的 SWC 处理；四种处理是 10-20 wt% SWC (W1)、30-40 wt% SWC (W2)、50-60 wt% SWC (W3) 和 70-80 wt% SWC (W4)。结果表明，W3适合育苗。与W3相比，W1、W2和W4生长生物量减少，含水量增加；K、Ca和Mg含量在W1下增加，而Na含量在W4下增加；叶片SOD、PPO、POD、CAT活性在W1和W4下显着升高，其中SOD活性最高，MDA含量在W1下达到最大值。W1和W4对幼苗生长有负面影响，幼苗通过形态和生理反应适应不利的水分条件。Cyclocarya种。