多效唑对高羊茅草坪的控长促壮效应(简报)

GROWTH RETARDING EFFECT OF PP_(333) ON TALL FESCUE TURF

高羊茅为适应性强、耐粗放管理的优良草坪草种，但在生长旺季需高强度修剪。本试验采用生长延级剂- 多效唑控制草坪生长，以减少修剪，降低生产成本。结果表明，多效唑能有效抑制草坪地上部直立生长，减少修剪次数；能有效增加绿度，提高密度，草坪均一性好，从而提高草坪质量；能促进分蘖，促进地下部根系生长，提高根冠比，增强草坪抗逆性。综合比较结果，以６００ｍｇ／ｋｇ多效唑处理的效果好，可在生产上试用。

Tall fescue is widely used on turf in most regions of China ,In spring and fall,tall fescue shows its fastest growth,thus heavy pruning is necessitated and turf management expense is increased.Using PP333 for retard- ing growth of tall fescue spring and fall is profitable for turf management ,In our experiment,the doses of PP333 used as growth retardant were 300,345.,600mg/kg.The experimental rusults indicated that PP333 can retard turf grass top growth,resulting in decrease of top biomass,increase of under-ground biomass,shoot density and leaf greenness,and so improve turf quality,enhance adverse resistance of turf grass plants and lower managerment ex- pense,Through the research,the conclusion can be made:600mg/kg PP333 treatment is the optimum measure for re- tarding tall fescue growth.