比久和矮壮素对矮牵牛穴盘苗生长的控制作用

Effects of Daminozide and Chlormequat on the Growth of Petunia Seedlings

为了防止矮牵牛穴盘育苗徒长，采用不同浓度的比久（B9）和矮壮素（CCC）溶液叶面喷施矮牵牛穴盘苗。结果表明，B9，CCC及二者混合处理矮牵牛穴盘苗的最佳浓度分别为2500 mg/L B9、0.3% CCC、1500 mg/L B9＋0.3% CCC，适宜浓度分别为1000~2500 mg/L B9、0.05%~0.3% CCC、1500 mg/L B9＋0.3% CCC，3种延缓剂最佳浓度相比，效果从好到坏为：1500 mg/L B9＋0.3%CCC ＞0.3%CCC ＞2500 mg/L B9，但2500 mg/L B9成本最低。当CCC处理浓度大于1%时，出现药害现象。

Often the excessive growth of Petunia takes place, which makes its quality reduced. The plug seed- lings of Petunia are treated with daminozide （B9） and chlormequat （CCC） of different concentrations by foliage spraying. The result shows： the plug seedlings of Petunia are treated with Bg, CCC and solution made up of B9 and CCC of different concentrations by spraying. Their effective and safe concentrations are 1000-2500 mg/L Bg, 0.05%-0.3% CCC and 1500 mg/L B9＋0.3% CCC respectively. And their optimal concentrations are 2500 mg/L B9, 0.3% CCC and 1500 mg/L B9-I＇-0.3% CCC respectively. Among the three optimal concentrations, ef- fect of 1500 mg/L BgA-0.3%CCC is the best and that of 0.3% CCC takes second place. But the price of 2500 mg/L B9 is the lowest. When the concentration of CCC is beyond 1%, the phytotoxicity of CCC on the plants will happen.