Effect of different growth regulators on the lawn quality

Effects of leaf spray PP333, Cycocel, Gibberellin, Ethylene and Methyl etc. on turf quality of Bluegrass (Poa annua cv. Baisheng), Tall fescue (Festuca arundinacea cv. Qiancao No.1) and Ryegrass (Lolium perenne cv. Shouxiang) were studied. The results showed that PP333 and Cygcocel played a role in restraining growth and regrowth of three grasses, and made the leaf become shorter and wider, the grass layer denser, chlorophyll content increase and the leaf color darker, and thus improved the turfgrass ornamental value. Gibberellin increased the growth period, made leaf become longer and thinner, increased the grass layer density, decreased chlorophyll content, turn the leaf color lighter, and promoted three turfgrasses to turn green in advance and extend their landscape effect. Methyl and ethylene showed less effect on turf quality.