我国引种的池杉,据初步调查有三个类型。其中“锥叶”池杉要求立地条件较高,生长较快,适于营造速生用材林;“线叶”池杉适应性较强,虽生长较慢,但树冠窄、枝叶稀,是营造农田防护林的较好类型;“羽叶”池杉枝叶茂密,生长也较快,适于城镇绿化。纯净的池杉种子每公斤约9,000—13,800粒;播种期为冬末或春初;播种前,用清水或40或50℃温水浸种4—5天,每天换水一次;用3％硫酸铜或1％ Mycestral introduced in China, according to the preliminary investigation, there are three types. Among them, “Cone-yew” Ipomoea cinnabarinum requires higher site conditions and faster growth, which is suitable for growing fast-growing timber forests. The “leaf-line” Ipomoea capensis adapts well and grows slowly but has narrow canopy and thin branches and leaves, Of the better type; “Yu Ye” Ipomoea clumpy foliage, growing faster, suitable for urban greening. Pure Sequoia seeds about 9,000-13,800 kg per kilogram; sowing time for the late winter or early spring; before sowing, soaking with water or 40 or 50 ℃ warm water 4-5 days, changing the water once a day; with 3% copper sulfate or 1%