摘要
以松嫩草甸的羊草为对象,比较研究了生长在5种不同盐碱化生境群落中的羊草克隆形态特征.结合克隆植物对资源的利用对策,对盐碱化生境中的羊草形态可塑性进行了讨论.通过对羊草根茎节间长、间隔子长、分枝角度、根冠比、分株密度、株高和生物量等指标的测定和分析,从基株和分株种群两个层次,研究了羊草的克隆构型特征和分株种群特征的变化.结果发现:随着生境土壤盐碱化程度的加重,羊草的克隆构型趋向于"游击型",根冠比呈逐渐下降趋势,表现为"逃避行为".
The clonal morphological plasticity of Leymus chinensis from five habitats with different degree of Salt and Alkali was studied. We measured intemode length, spacer length, branching angle and root/shoot ratio, and found that as the degree of salinity and alkalinity increased, clonal architecture of Leyrnus chinensis tended to be more ＂guerrilla＂, while the root/shoot ratio presented downtrend. These results are discussed in the context of resource acquisition strategy by clonal plants.
出处
《沈阳师范大学学报（自然科学版）》
CAS
2007年第4期506-509,共4页
Journal of Shenyang Normal University:Natural Science Edition
基金
吉林省环保局项目(2001017)
关键词
羊草
盐碱化
形态可塑性
克隆生长
Leymuschinensis
salinity and alkalinity
morphological plasticity
clonal growth
