摘要
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。
The wide use of turfgrass in urban landscaping has resulted in an increased water requirement for maintenance and management.A pot experiment was conducted to determine the physiological effects of different concentrations of paclobutrazol（PP333）on drought resistance of six turfgrass cultivars：two each of perennial ryegrass（Bomber and Esquire）,red fescue（Beifang and Rubra）and kentucky bluegrass（Kentucky and Merit）.Different concentrations of PP333 significantly increased the RWC,chlorophyll content and SOD activity,but decreased leaf relative electrical conductivity and proline content 30 dafter drought stress,indicating that PP333 could effectively enhance the vitality and drought resistance of the six turfgrass cultivars.The optimal concentration of PP333 to increase the drought resistance was 100mg/L for Esquire,Beifang and Rubra,200mg/L for Bomber and Kentucky,and 300mg/L for Merit.
出处
《草业学报》
CSCD
北大核心
2014年第6期253-258,共6页
Acta Prataculturae Sinica
基金
中央高校基本科研业务费专项资金项目(2572014CA27)资助
关键词
草坪草
多效唑
干旱胁迫
抗旱性
turfgrass
PP333
drought stress
drought resistance
