本文探讨了草坪草在干旱条件下质量的变化与生根深度和根长密度的关系．分析了草坪草抗旱能力的差异性，根系与抗旱性的关系以及草坪抗旱机理，为我国草坪草引进种植，新品种选育提供理论依据． In this paper, the relationship between the change of turfgrass quality under drought and rooting depth and root length density was discussed. Analyzed the difference of turfgrass drought resistance, the relationship between root system and drought resistance as well as the mechanism of lawn drought, which provided theoretical basis for the introduction of turfgrass planting and breeding of new varieties in our country.