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为探讨冷季型草坪草对水分胁迫的生理生态机理,本研究通过测定草地早熟禾的‘自由Ⅲ’、高羊茅的‘家园’和匍匐翦股颖的‘普特’3种冷季型草坪草在不同水分胁迫处理条件下的植株外部形态表现、土壤实际含水率、根系在土壤中的分布和生理指标,比较3种冷季型草坪草品种间的耐旱性差异。结果表明:‘家园’在水分胁迫条件下具有较好的生长表现,在土壤中的根系分布较深(30.77%)、土壤含水量下降较少(12.59%),且能维持较高超氧物歧化酶活性(329.6 U/g),叶片细胞膜系统的损坏程度较轻)(1.22μmol/L);‘自由Ⅲ’次之,‘普特’最差。
In order to explore the physiological and ecological mechanisms of cold-season turfgrass on water stress, three cold-season types of ’Poisson’, ’Freedom Ⅲ’, Tall Fescue ’Homeland’ The turfgrasses under different water stress treatment conditions of the external morphology of the plant, the actual soil moisture content, root distribution in the soil and physiological indicators to compare the three cold-season turfgrass varieties drought tolerance differences. The results showed that ’Home’ had better growth performance under water stress, with deeper root distribution (30.77%) and less soil moisture (12.59%) in soil, and could maintain high superoxide dismutation Enzyme activity (329.6 U / g), leaf cell membrane system damage less) (1.22μmol / L); followed by ’free Ⅲ’, ’Pu Te’ worst.