白果是雌雄异株、风媒花植物。雌树之花得授雄树之花粉方可结实。据笔者在实践中调查,对雄树资源授粉树存在如下问题:1　雄株资源现状11　雄株数减少　根据我乡白果雄树资源调查发现,雄树株数从解放初期的800多株,目前砍掉雄树近300株,现全乡雌株17581株,雄株仅420株,占23%。12 Ginkgo is dioecious, wind-resistant plants. The flowers of the female tree must be pollinated with male pollen. According to the author’s investigation in practice, there are the following problems with pollination tree of male tree resources: 1 Status of male plant resources Reduced number of 11 male plants According to the investigation of male tree resources in Gansu Province, more than 800 male trees have been cut from the early liberation Nearly 300 male trees, now the province 17581 female plants, only 420 male plants, accounting for 23%. 12