干旱胁迫对 3 种草坪草的生长及叶绿素含量的影响

摘要

笔者采用盆栽试验,研究了不同程度的干旱胁迫对多年生黑麦草、草地早熟禾、高羊茅3种草坪草的生长及叶绿素含量的影响. 结果表明:高羊茅抗旱能力较强,极度亏缺灌溉下生物量开始下降;多年生黑麦草次之,重度亏缺灌溉下其生物量开始降低;草地早熟禾对干旱胁迫较敏感,轻度亏缺灌溉下其生长势低,重度亏缺灌溉下其生物量开始明显降低.%Influence of drought stress on growth and chlorophyⅡcontent of Lolium perence L., Poa pratensis L., Festuca arundinacea was studied by pot experiment.The results showed that drought resistence of Festuca arundinacea was the strongest, and biomass reduced under extreme irrigation deficit;drought resistance of Lolium perennewas was stronger, and biomass reduced under severe irrigation deficit;Poa pratensis was sensitive to drought stress, and biomass reduced under slight irrigation deficit while reduced remarkably under severe irrigation deficit.