植物生长延缓剂对万寿菊穴盘苗生长的控制作用研究

Effects of plant growth regulators on Tagetes erecta L.seedling growth

摘要: 试验研究不同浓度的植物生长延缓剂比久(B₉)、矮壮素(CCC)和多效唑 (PP₃₃₃)溶液对万寿菊穴盘苗生长的控制作用结果表明，B₉、CCC 及PP₃₃₃处理万寿菊穴盘苗的最佳浓度分别为2500mg/kg、0.3%和60mg/kg，适宜浓度分别为1000～2500mg/kg、0.1%～0.3%、10～60mg/kg。3种延缓剂最佳浓度处理对万寿菊穴盘苗生长的控制作用60mg/kg PP₃₃₃处理＞0.3% CCC处理＞2500mg/kg B₉处理，且60mg/kg PP₃₃₃处理成本最低。当CCC处理浓度＞1.0% 时万寿菊穴盘苗出现药害现象。

Abstract: Plug seedlings of marigold(Tagetes erecta L.) were treated through foliage spraying with different concentrations of plant growth regulators(PGR)—daminozide(B₉),chlormequat(CCC),and paclobutrazol(PP₃₃₃).The study shows that the optimal concentrations of B₉,CCC and PP₃₃₃ for marigold seedling growth regulation are 2500mg/kg,0.3%,and 60mg/kg and the effective and safe concentration ranks of the three PGRs are 1000～2500mg/kg,0.1%～0.3% and 10～60mg/kg,respectively.Among the three optimal alternatives,60mg/kg PP₃₃₃proves best with lowest cost followed by 0.3% CCC.When CCC concentration gets beyond 1.0%,plant phytotoxicity occurs.