一、引言在加拿大北部地区的苗圃里,杨树插条越冬贮藏的传统方法是室外假植。这些插条在初春温暖时期即解除休眠,但由于苗圃作业的冲突,栽植往往要推迟,其结果是插条的生根率低。本研究是比较冷藏的几种方法,特别是欧美杨杂交种(Populus×deltoides Bartr. CV.‘Walker’)无性系插条的冷藏法。欧美杨杂交种“Walker”最初被命名为FNS44-52,是由John Walker 1944在印度林业苗圃总站选出,Roller 1972年正式鉴定和登记的。 I. INTRODUCTION In the nurseries of northern Canada, the traditional method of winter storage of poplar cuttings is outdoor planting. These cuttings were lifted during the warmer months, but planting was often delayed due to nursery operations, resulting in low rooting rates. This study is a comparison of several methods of refrigerated storage, especially the chilling of Populus × deltoides Bartr. CV. ’Walker’ clones. The European and American hybrid “Walker” was originally named FNS44-52 and was selected by the Indian Forestry Nursery Terminal by John Walker 1944. Roller was officially identified and registered in 1972.