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毛白杨生长迅速,材质良好,是华北重要的用材和城市绿化树种之一。目前毛白杨最简便的繁殖方法是扦插育苗,但由于成活率低而不稳,影响着大量的繁殖和发展。通过试验,采用腐殖酸钠(以下简称腐钠)处理毛白杨插穗,育苗成活率达到90％以上,突破了扦插成活关。影响毛白杨扦插成活的因素很多,主要原因是它的根原体少、分布不均,萌发困难。一株种条只有50—60个根原体,比普通易成活的杨树少70％左右、它的分布范围,从基部到中部渐次减少,梢部一般没有。这些根原体又受皮层的抑制,不易萌发成根。所以,如何增强
Populus rapid growth, good material, is an important timber in northern China and one of the urban afforestation species. At present, Populus tomentosa easiest breeding method is cuttage nursery, but because of low survival rate and instability, affecting a large number of breeding and development. Through experiments, the use of sodium humate (hereinafter referred to as rotten sodium) treatment Populus cuttings, seedling survival rate reached 90%, breaking the survival of the cut off. There are many factors affecting the survival of Populus tomentosa cuttings, mainly because of its less root, uneven distribution, germination difficult. A species of only 50-60 root of the root body, about 70% less poplar than ordinary survival, its distribution range gradually decreased from the base to the middle, the tip is generally not. These roots and cortical inhibition, difficult to germinate into roots. So, how to enhance