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从1979年开始,我们在秦岭林区长青林业局华阳林场,对卜氏杨(Populus purd-omii)从种子采集、处理到苗圃育苗,进行了比较系统的试验。9年来,共育苗0.5公顷。现将几年的育苗经验总结如下。一、卜氏杨的分布及林学特性卜氏杨又称太白杨、东瓜杨。秦岭南北均有分布,生于海拔700—2300米的河沟及坡麓地带。喜湿、耐寒。生长迅速,树体高大,树干通直。纯林或与耐湿性树种混交。雌雄异株,先叶开放。雌株冠幅大,枝条舒展;雄株树冠小,枝条开张角度小。雌株花黄绿色,花序长5—7厘米;雄株花黄色,花序长10—15厘米。二、采种及种子处理据观测,母树分布的海拔高度不同,采种时间也随之不同。同时果实成熟期的气候也影响果实成熟的时间。海拔1200米左右的母树,种子成熟期为6月10日左右;海拔
Since 1979, we conducted a systematic experiment on collecting and treating Populus purd-omii from seed collection and seedling nursery in Huayang Forest Farm, Changqing Forestry Bureau, Qinling Mountains. In nine years, a total of 0.5 hectares nursery. Several years of nursery experience are summarized below. First, the distribution of Bu’s young and forest characteristics Bu’s young, also known as too young, east melon Yang. North and South Qinling are distributed, was born at an elevation of 700-2300 meters of the river ditch and the foothills. Hi wet, cold. Grow rapidly, tall trees, trunk straight. Pure forest or mixed with moisture-tolerant species. Dioecious, first leaves open. Female strains of large crown, branches stretch; male canopy small branches opening angle is small. Female flowers yellow-green, inflorescence 5-7 cm long; male flowers yellow, inflorescences 10-15 cm long. Second, seed and seed treatment It is observed, the distribution of the mother tree altitude is different, the seed time is also different. At the same time, the climate of ripening fruit also affects the ripening time of the fruit. The mother tree, about 1,200 meters above sea level, has a maturity of about June 10; altitude