Abstract: The effects of chlorocholine chloride(CCC) with different concentrations and of Paclobutrazol(PP333) with a certain concentration on the quality of Kentucky bluegrass turf which had been established for five years were studied in science garden of China agricultural university.It was showed that appling CCC can reduce the growth speed of kentucky bluegrass turf,decrease the disease resistance.As increasing of the CCC concentration,the growth rate decreased intensitively.Lower concentration of CCC can promote the tillering,increase underground biomass and improve the turf uniformity.Appling PP333 reduced turf growth speed,restrained tillering and accumulated underground biomass,decreased disease resistance,and had accumulated underground biomass,decreased disease resistance,and had a bad effect on turf greenness and turf uniformity.Using 100mg/kg CCC was better for Kentucky bluegrass turf.

Key words: Kentucky bluegrass, Chlorocholine chloride, Paclobutrazol, Turf quality

摘要： 探讨了矮壮素和多效唑对草地早熟禾草坪质量的影响。结果表明,施用矮壮素延缓了草地早熟禾的生长速度,并且随着浓度的增加延缓作用随之加强。矮壮素减弱了草坪的抗病性,提高了整齐度,但对颜色有伤害作用。低浓度矮壮素能促进分蘖和地下生物量的积累。340mg/kg的多效唑延缓了草地早熟禾的生长速度,抑制分蘖和地下生物量积累,损伤其颜色、整齐度,减弱抗病性。综合考虑,草地早熟禾以施用100mg/kg浓度的矮壮素较合适。

关键词: 草地早熟禾, 矮壮素, 多效唑, 草坪质量