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草业学报  2014 

多效唑对6种草坪草苗期抗旱性影响的研究

DOI: 10.11686/cyxb20140630, PP. 253-258

Keywords: 草坪草,多效唑,干旱胁迫,抗旱性

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Abstract:

草坪草在城市园林绿化中的广泛应用,加大了养护管理需水量。为了节约有限的水资源,本试验选用北方城市绿化常用的冷季型草坪草作为研究材料,采用盆栽方式,研究不同浓度的多效唑(PP333)对多年生黑麦草品种轰炸机(Bomber)、绅士(Esquire),紫羊茅品种北方(Beifang)、梦神(Rubra)以及草地早熟禾品种肯塔基(Kentucky)、优异(Merit)抗旱性的生理影响。研究结果表明,干旱胁迫30d后,多效唑处理能显著提高6种草坪草的RWC、叶绿素含量和抗氧化物酶SOD活性,降低其叶片相对电导率、游离脯氨酸含量,这表明多效唑能有效提高它们的活力和抗旱性。通过对相关生理指标的综合比较分析,总结出对6种草坪草各苗期抗旱性能力有促进作用的最佳PP333浓度为:绅士、北方和梦神100mg/L,轰炸机和肯塔基200mg/L,优异300mg/L。

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