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河北杨分布于我国华北和西北广大地区。生长迅速、适应性强、根萌蘖力旺盛,适于黄土丘陵、梁峁坡脚、冲积阶地、渠道两旁和风沙平原地区造林,是一种优良的用材和水土保持树种。但是,该树种用种子繁殖困难,扦插、埋条育苗成活率很低,远不能适应造林绿化事业的需要。为了迅速扩大繁育指数,提高种苗质量,为保护环境和大干快上农业服务,我们借
Hebei Yang distribution in North China and Northwest China vast area. Rapid growth, adaptability, strong rooting ability of sprouting, suitable for loess hills, Liang 峁 slope foot, alluvial terraces, both sides of the channel and afforestation in the area of wind and sand, is an excellent timber and soil and water conservation tree species. However, the species of seed propagation difficulties, cuttings, buried seedling survival rate is very low, far can not adapt to the needs of afforestation projects. In order to rapidly expand the breeding index, improve seed quality, to protect the environment and agricultural services, we borrow