伊盟地区的人工林60年代后期就出现了“小老头树”,到70年代后期已成为一个严重问题。据74年以来的观察:没有严格做到适地适树良种壮苗,混交方式和密度安排不当,水、肥条件不足等都是产生“小老头树”的原因。但带有普遍性的原因是经营管理问题。1974～ Plantation forests in the Iran-EU region emerged as “little old trees” in the late 1960s and became a serious problem by the late 1970s. According to the observation since 74 years, there is no reason why tree seedlings are not strictly suitable for planting seedlings, improper mixing methods and density arrangement, insufficient water and fertilizer conditions are the causes of “small old tree.” However, the reason for the universality is that of management. 1974 ~