珙桐种壳坚硬,较难发芽。根据现有资料,珙桐种子育苗一般需要半年以上甚至长达1——2年才能发芽,发芽率低,且不整齐,给发展珙桐带来一定困难。我们于1980年11月从桑植县引进一批种子,进行露天沙床育苗、混沙分层贮藏、开水 Dung Tong hard shell, more difficult to germinate. According to available information, Davidia involucrata seeds seedlings generally require more than six months or even up to 1 - 2 years to germinate, germination rate is low, and irregular, to develop Davidia involucrata certain difficulties. In November 1980, we introduced a batch of seeds from Sangzhi County to carry out open-air sand bed nursery, sand mixing and stratification storage, boiling water