关键词: 毛乌素沙地, 飞播植被, 演替阶段与速度

Abstract:

Succession of the aerial seeding vegetation in the Maowusu Sandyland can be divided into three periods or stages, the first stage is aerial seeding plants dominated communities stage, the second one is dominated by both aerial seeding plants and natural plant, especially Artemisia ordosica, and the third stage is called natural plants or A. ordosica dominated community stage. With regard to the time of each stage maintained or the rate of succession, the stage dominated by aerial plants is no more than 20 years at most. The period of the first two stages together is less than 35 years, that is to say, 35 years after the aerial seeding A. ordosica will occupy predominance in communities, and the aerial plants will exist only as accompanying species.

Key words: The Maowusu Sandy land, Aerial seeding vegetation, Stage and rate of succession