The results obtained Showed:1. The four PGRs were different in effect, with uniconazole having the strongest effect on dwarfing of Bermudan grass and ryegrass, B9 having no obvious effect, chlormequat and mepiquat chloride being intermediate.

• 不同延缓剂对草坪草的作用不同,本试验所涉及的四种延缓剂中,对草坪草狗牙根和黑麦草矮化效果最好的是烯效唑,其次是矮壮素和缩节胺,比久在草坪上施用效果不明显。