关键词:园林植物； 草坪； 研究； 践踏胁迫； 地下生物量； 土壤物理性质
Key words:Landscape Plants; Turf Grasses; Study; Traffic Stress; Underground Biomass; Soil Physical Property
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——王小君 宋桂龙[WANG Xiao-jun, SONG Gui-long]　(2007年 第07期 页码/Page:65)

摘要:研究了践踏胁迫对3种草坪草（草地早熟禾、高羊茅、日本结缕草）地下生物量的影响。结果表明：践踏胁迫下，3种草坪草地下生物量变化表现出较大差异，草地早熟禾和日本结缕草先增加后下降，高羊茅一直呈下降趋势；3种草坪草表层根系（0~5cm）所占比重明显增加，深层根系所占比重减小，根系的表层化现象明显；研究还表明，践踏使表层土壤容重和硬度增加，物理性质恶化。

Abstract:Effects of traffic stress on the underground biomass and soil physical properties of three turf grasses (Poa pratensis, Fistuca arundinacea, Zoysia japonica) are studied. Research results indicated that the underground biomass changes of three species differed obviously under different traffic treatment. Poa pratensis and Zoysia japonica underground biomass increased at the light traffic then declined. ‘Barlexas’ Tall fescue decreased with increasing traffic stress. Obvious root shallowing phenomenon is displayed through the increase of roots percent in surface layer and decline in deep layer. Moreover, traffic made the soil density and hardness increase.