从现有林中,选择适合当地生长并具有优良遗传性状的单株——即优树,加以利用繁殖,建立种子园,是林木良种繁殖中的主要方法之一。因此,针对一定地区的某个树种,制定操作简便易行,结果准确可靠的优树选择方法,对当前正在大力开展的群众性林木良种选育工作是十分重要的。目前,国内外有关用材树种优树标准和选 It is one of the main methods to seed the breeding of elite trees from the existing forest by selecting the single-elite tree which is suitable for local growth and has good genetic traits. Therefore, it is very important to develop a good tree selection method which is simple and easy to operate and accurate and reliable for a certain tree species in a certain area. At present, the relevant timber species and tree selection criteria