用种子播种培育1年生香椿苗,除作露地栽培之外,主要是利用苗木在露地生长期内积累的养分和形成的饱满顶芽,在落叶后将起囤栽于保护地内,使之萌芽生长。但这种1年生苗木,在囤入保护地设施之后,有一些植株的梢端常因失水或冻害而发生干枯现象,生产上称这种现象为“枯梢”或“干梢 Inoculation with seed sowing 1-year-old toon seedlings, in addition to open field cultivation, the main use of seedlings in the open-growth period accumulation of nutrients and the formation of a full of top buds, after deciduous will store in the protected area, so that the germination and growth . However, after the plantation of the 1-year-old seedling shelled in a protected area, some plants often suffer from the phenomenon of dryness due to water loss or frost damage. The production is referred to as “dry shoots” or "dry shoots