野生结缕草耐践踏性综合评价

Comprehensive evaluation of trampling resistance of wild zoysia

【目的】研究野生结缕草被践踏后的综合表现,探索其作为运动场草坪和游憩草坪的开发价值。【方法】以目前湖南省常用的草坪草杂交狗牙根为对照,研究不同践踏强度对野生结缕草和杂交狗牙根外观质量(色泽、盖度、密度、质地、均一性)、生长发育(生物量和植株高度相对生长率)和生理代谢(叶片相对含水量、质膜相对透性、根系活力、可溶性糖含量)的影响。【结果】不同践踏处理下野生结缕草的盖度、叶片宽度、密度、均一性、地上/地下生物量、叶片相对含水量、根系活力等8项指标的均值大于杂交狗牙根,而叶绿素含量、株高相对生长率、叶片细胞伤害率、可溶性糖含量等4项指标的均值小于杂交狗牙根。【结论】野生结缕草具有较强的耐践踏性,适于在运动场草坪和游憩草坪中应用。

[Objective]In order to assess the development value of wild zoysia as recreation and sport turf, its comprehen- sive performance after being trampled was studied. [Method]In this experiment, hybrid bermuda grass, a popular grass species for playground in Hunan, was used as the control The effects of different trampling intensity on the appearance quality （color, coverage, density, texture, uniformity）, growth and development （biomass, relative growth rate of plant height） and physiological metabolism （relative water content, relative plasma membrane permeability, root activity, soluble sugar content） of wild zoysia and hybrid bermuda grass were studied. [Result]Tile mean values of coverage, leaf width, density, uniformity, aboveground/underground biomass, leaf relative moisture content and offspring system energy of wild zoysia under different trampling treatments were greater than those of hybrid bermuda grass. However, the mean values of chlorophyll content, relative growth rate of plant height, leaf injury rate and soluble sugar content of wild zoysia were lower than those of hybrid bermuda grass. [Conclusion]Wild zoysia performed better trampling tolerance and it can be used for recreation and sport turf.