关键词: 差不嘎蒿, 生物量, 组成分析

Abstract: Artemisia halodendron is a buffering species in the elementary stage of vegetational degradation in Horqin. It reproduces rapidly, and occupies space that was maintained by extinct species in semi-fixed sanddune pasture. Biomass of A. halodendron increases 203.4 g/m² from fixed sanddune pasture to semi-fixed sanddune posture, the highest among four pasture types. Its biomass decreases 95 g/m² from semi-fixed sanddune pasture to semi-drifting sanddune pasture, but relative biomass increases by 16% and it is the highest in four pasture types. Ability of reproduction for A. halodendron is highest in send-drifting senddune pasture. Seedlings and biomass of fruits are 59 unit/m² and 17g/m² respectively. Except in drifting sanddune pasture, asexual regeneration of A. halodendron is major mode of reproduction. Especially, sprouting from roots and branches buried by sand is the most inportant asexual reproductive means. Shrubby characters of A. halodendron are very evident in semidrifting sandy dune pasture and play an import role.

Key words: Artemisia halodendron, Biomass, Horqin