多效唑对高羊茅草坪草耐热性的影响

Effect of Multiple-effect Triazole on Heat Tolerance of Tall Fescue Turf Grass

高温是影响冷季型草坪草分布的重要因子。用0～1000mg·kg^-1的多效唑喷施高羊茅草叶面，结果表明：200mg·kg^-1多效唑可抑制地上部生长，促进地下生物量积累，提高草坪质量，增加叶片的叶绿素、可溶性糖、可溶性蛋白质含量和过氧化物酶活性，降低丙二醛含量，保持膜系统稳定，从而增强耐热性和抗病性，提高其越夏能力。

High temperature is an important factor affecting the distribution of cold-season turf grass. It is difficult to plant cold-season turf grass in the South of China because of high temperature in summer. Spraying multiple-effect triazole （MET） with 0 - 1 000mg·kg^-1 to tall fescue turf grass indicates that application of 200 mg·kg^-1 MET can inhibit the top growth of the turf grass, promote accumulation of the underground biomass and improve turf quality. It can also increase contents of chlorophylls, soluble sugar and soluble protein of leaves and peroxidase activity, decrease malonaldehyde content, maintain stability of membrane system of leaves, with more heat tolerance, anti-disease capacity, and oversummering ability.