舜王坪山地草甸土壤水分对群落优势种生产力的影响内容摘要本研究以山西历山舜王坪山地草甸优势种橐吾(Ligularia sibirica)、早熟禾(Poa annua)和地榆(Sanguisorba officinalis)为研究对象,通过对土壤水分与优势种生产力关系的分析,发现土壤水分仅对优势种地榆的相对生物量产生影响,而对优势种橐吾和早熟禾的生物量和相对生物量未产生影响。表明土壤水分会对当地生态系统优势种产生一定的影响,但这种作用受群落内其他物种的影响。同时,土壤水分的影响也受优势种种类的影响。【关键词】 土壤水分 生物量 相对生物量 山地草甸 The effect of soil moisture on the productivity of dominant species in the meadow of shunwangping mountainAbstractIn this study, the dominant species of Wangping, Poa annua and Sanguisorba officinalis were studied by analyzing the relationship between soil moisture and dominant species productivity. Soil moisture was found to have an effect only on the relative biomass of dominant cultivar elm, and on the biomass and relative biomass of dominant cultivar ligularia and precocity. It is shown that soil water will have some effect on the dominant species of local ecosystem, but this effect is influenced by other species in the community. At the same time, the influence of soil moisture is also affected by the dominant species.【Key words】soil moisture biomass relative biomass mountain meadow1舜王坪山地草甸土壤水分对优势种群落优势种生产力的影响1 立题依据及研究内容1.1 研究的背景和意义生态系统功能的集中体现是生产力,对维持生态平衡发挥着重要作用。众多学者认为生态系统功能由生物多样性决定,但是近年来质量比例假说( The Mass Ratio Hypothesis)认为在某个时间段的生态系统功能主要由植物优势种的性状值决定 [1]。鉴于此,可以推出优势种决定着生态系统的功能,也就是说优势种对群落生产力具有关键作用。土壤水分对植物根系的生长、分布和力学性能的发展有重要作用[2],因此,研究土壤水分对群落优势种生产力有影响至关重要。本文主要研究舜王坪山地草甸土壤水分对群落生产力优势种...