多效唑对3种冷季型草坪草种子萌发和幼苗株高的影响  

Effect of Paclobutrazol on Seed Germination and Seedling Height of Three Cool-Season Turfgrasses

作　　者：刘嘉蓉[1] 钮友民[1] 钟玮 

机构地区：[1]杭州植物园

出　　处：《浙江林业科技》1996年第3期40-45,共6页Journal of Zhejiang Forestry Science and Technology

摘　　要：３种冷车型草坪草种子经不同浓度多效唑浸泡４ｈ或２４ｈ后，其发芽势和发芽率的变化有明显的种间差异。弗连德多年生黑麦草所有处理种子的发芽势和发芽率与对照（清水浸种）的差异均不显著；埃雷苇状羊茅处理种子的发芽势减弱，与对照差异极显著，其累积发芽率在高浓度多效唑浸种时下降，与对照差异板显著，低浓度多效唑处理种子的累积发芽率与对照差异不显著；梅里特草地早熟禾所有处理种子的发芽势和发芽率都急剧下降，与对照的差异均极显著。３种冷季型草坪草种子萌发对多效唑的敏感性依次为梅里特草地早熟禾＞埃雷苇状羊茅＞弗连德多年生黑麦草。多效唑浸种还抑制３个草种幼苗的株高增长，费连德多年生黑麦草和梅里特草地早熟禾幼苗的株高随多效唑浓度增大而减低，两者间呈显著或极显著线性负相关，埃雷苇状羊茅幼苗株高与多效唑浓度间的线性负相关性较差，但所有处理的幼苗株高与对照差异均极显著。Lolium perenne 'Fred', Festuca arundinaceae 'Era' and Poa pratensis Merit' seeds were soaked with pp333 of concentrations from 7. 5 to 480(×10-6) for 4h or 24h. The germination energy and germination rate of perennial ryegrass were not influenced by pp333 treatments. For tall fescue 'Era', the germination energy of treated seeds declined compared with untreated control, the germination rate of treated seeds was not influenced, except treatmentof the highest level pp333. For Kentucky bluegrass 'Merit', the germination energy and germination rate were inhibited seriously by pp333 treatments. Seed germination suscepbility of three turfgrasses to pp333 showed in the order of kentucky bluegrass 'Merit'> tall fescue 'Era' >perennial ryegrass 'Fred', For all speceis, pp333 applications resulted in reduced seedling height.Plant height of perennial ryegrass 'Fred' and kentucky bluegrass 'Merit' decreased linearly with increased pp333 concentrations. Plant height of tall fescue 'Era' was poorly correlated with pp333 concentration, but all treated plant heights were shorter of the control, there was significant difference, a ≤0.01 by LSR test.

关 键 词：多效唑 草坪草 种子萌发 幼苗株高 

分 类 号：S688.4[农业科学—观赏园艺] S143.8[农业科学—园艺学]