本实验以15种植物的叶为试材,分别用0%、1.02%、5.85%、10.22%、14.21%和17.15%浓度90℃硫酸铜(CuSO₄·5H₂O)溶液进行保色处理,对其中不易进行保色处理的叶材人为造伤,研究硫酸铜浓度和造伤对叶材保色效果的影响。结果表明,不同叶材对硫酸铜溶液的反应不同:纸质叶材如酢浆草在热的硫酸铜溶液中易皱缩变形,革质叶材如荷兰铁和铁树,用硫酸铜热处理无效;新叶较成熟叶易于保色。硫酸铜浓度对保色效果没有影响,但对保色时间有影响,硫酸铜浓度越高,复绿时间越短,14.21%和17.15%两种浓度的复绿时间相同。保色处理的叶材干燥前后颜色有深浅变化。少数叶材如贴梗海棠不经保色处理自然干燥就能较好保持原有色彩。造伤有利于部分革质叶材的保色。

In this paper,15 kinds of green leaves were treated with 0%,1.02%,5.85%,10.22%,14.21% and 17.15% copper sulfate solution at 90℃,and leaves which were uneasy to be kept in color were injured to study the effects of copper sulfate concentration and injury on leaves' color keeping.The results showed that different kinds of leaves responded differently to copper sulfate solution.Heat copper sulfate solution deformed paper leaves (e.g.Oxalis corymbosa) easily and had no effect on some kinds of leathery leaves (e.g.Yucca elephantipes and Cycas revoluta).Young leaves' color was much easier to be kept than that of matured leaves.Copper sulfate concentration had no effect on color,but had effect on the time of color keeping.The higher the copper sulfate concentration,the shorter the time of returning green.The time of returning green was the same in 14.21% and 17.15% copper sulfate concentration.Leaves' color being treated by copper sulfate changed between light and dark before and after dried.A few leaves,such as Chaenomeles speciosa,could keep original color after dried naturally without being treated by copper sulfate.And injury was favor to color keeping of some kinds of leathery leaves.