摘要
科尔沁沙地天然榆树疏林草原的自然更新能力较强,每年可以产生大量的榆树幼苗,疏林地内每个小居群内的幼苗数以1株～10株最多,每公顷疏林地有幼苗6万多株,折合6株/m2,为榆树疏林草原植被的恢复提供了可能.科尔沁沙地榆树疏林草原的类型多样,具有多种经营利用方向.主要类型可以划分为以下3种:Ⅰ型为散生的榆树疏林草原,Ⅱ型为团块状的榆树疏林草原,Ⅲ型为榆树灌丛疏林草原,榆树和山杏、山里红等共同构成群落的主体.沙地植被的恢复可以采取对天然榆树疏林草原在封育的基础上通过人工经营管理,进行定向培育,可以在短期内按照人类自身的目的尽快地得以恢复;也可以通过人工措施重新建立上述3种类型的人工疏林草原植被.沙地疏林草原植被属于生态经济型植被类型,需要把疏林和草原有机的结合起来,生态与经济效益并重,天然植被人为定向恢复和人工疏林草原植被建设相结合.
Natural regeneration ability of woodland - steppe in Kerqin Sandy land were very strong. There were 60 000 elm seedlings/hm^2 in elm woodland - steppe. Woodland - steppe is restorable by hill fence, and new woodland- steppe. The types of elm woodland- steppe were variety, mainly three kinds： Type Ⅰ was scattered elm woodland - steppe can be cohstructed, Type II was group elm woodland - steppe, Type III was elm woodland - steppe shrubbery. It can be restored in a short- term by hill closure and management. Also artificial woodland - steppe can be established. It is necessary to combine woodland with steppe, ecology with economy, natural vegetation artificial directional cultivate with artificial vegetation establish organically.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
2005年第3期1-6,共6页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
国家自然科学基金项目30360088
国家林业局"948"项目2002-4
关键词
科尔沁沙地
榆树疏林草原
植被恢复
经营管理
Kerqin sandy land
elm woodland -steppe
vegetation restoration
management
