秃杉引种耐荫性的初步研究

A preliminally study on shade tolerance in Taiwania flousiana

在江苏南京、江宁、句容等地对引种秃杉的耐荫性初步研究表明,秃杉幼龄阶段具有较强的耐荫性。苗期可以适应200～300勒克司的微弱光照,幼树枝叶在500～1000勒克司弱光照下的树冠内,仍能正常生长。适度遮荫可以提高裸根苗移植成活率,避免或减少日灼造成的生理病害,并促进苗木生长。利用这一重要生物学特性对于在纬度偏北、海拔低、光照强的江苏引种区选择合理的秃杉引种栽培模式,保障引种顺利进行,扩大和保存繁衍秃杉珍稀树种资源具有重要实践意义。

The preliminally study on shading tolerance of the introduced tree species in Taiwania flousiana done in Nanjing, Jiangnin, and jurong, in Jiangsu indicated that the shading tolerance of it is relatively strong, during its juvenile stage. 200-300 lx can be adapted to its seedling, the young tree still can grows very well under the canopy with 500-1000 lx of light. By propert shading, the transplant servival rate of bare-rooted seedling can be improved, the abiotic disease caused by sun burn could be avoided or decreased, and the growth will be enhanced.