模拟放牧研究冷蒿繁殖构件的变化

在荒漠草原封育3年的样地上模拟放牧,对冷蒿Artemisia frigida的繁殖构件进行了分析,从而探讨冷蒿在不同利用方式和利用强度下的繁殖潜力.结果表明:节间距和匍匐茎对于植物密度的影响比较敏感.在周围植物密度增加的情况下,冷蒿通过缩短匍匐茎和节间距来增加不定根和营养枝条.模拟绵羊践踏,在6月切断匍匐茎与母株的连接时,匍匐茎的死亡率最高.模拟绵羊采食,在7月刈割,冷蒿的繁殖构件表现最好.

Studies on reproductive module change of Artemisia frigida through simulated grazing

The paper analyzed the change of reproductive module of Artemisia frigida through simulated grazing in three-year fenced plot on desert steppe.The results showed the length of internode and stolons were sensitive to plant density.Under the increase of plant density around,A.frigida population decreased length of internode and stolons in order to increase adventitious root density and vegetative shoots density.Mortality rate of stolons was the highest when cutting its connection with main branch in June.All reproductive model of A.frigid were the best when mimicking sheep grazing in July.