外来入侵植物牛膝菊种群构件生物量结构

Biomass structure of exotic invasive plant Galinsona parviflora.

牛膝菊原产南美洲,为沈阳地区爆发式入侵种.本文从构件水平研究了牛膝菊种群各构件生物量结构特征和各构件生物量间的关系模型,并进行了定量分析.结果表明,牛膝菊种群各构件生物量之间关系为茎>叶>花序>根.各构件生物量在个体生物量中所占比率表现为茎>叶>根>花序.牛膝菊种群茎生物量和叶生物量与植株高度、根生物量、花序生物量之间都呈显著的正相关关系,均可用幂函数模型较好地表达.

Galinsona parviflora is originated from South America, and has an eruptive invasion in Shenyang area. This paper studied the biomass structure of G. parviflora population at module level, with the correlation models among different modules biomass established and quantitatively analyzed. The results showed that the modules biomass of G. parviflora was decreased in the sequence of stem 〉 leaf 〉 capitulum 〉 root, and the proportion of each module＇ s biomass to the whole plant biomass was in the order of stem 〉 leaf 〉 root 〉 capitulum. Stemand leaf biomass had significant positive correlations with plant height, root biomass and capitulum biomass, and all the correlations could be well expressed by exponential model.