Dwarfing effects of paclobutrazol and CCC on hedge plant Carmona microphylla

[Objective]This research aimed to analyze the dwarfing effects of paclobutrazol and CCC on hedge plant Carmona microphylla and relrvemt economic benefits in order to obtain an economical way of chemical pruning the hedge plant, reasonably using plant growth retardation, and decreasing maintenance cost of unban landscaping. [Method]The leaf area, leaf thickness, chlorophyll content, and new shoot increment of Carmona microphylla were analyzed after each subject was treated with different concentrations of paclobutrazol and CCC; their mixture was used to investigate the corresponding dwarfing effects and economic benefits. [Result]The optimum combinations to create the best dwrafting effects were determined to be as follows: 600 times of CCC+600 times of paclobutrazol or 400 times of paclobutrazol. According to the large-scale experiment, spraying the above combinations three times a year to Carmona microphylla could assure excellent landscaping effect. Meanwhile, the production cost could be lowered by 29.82 yuan/m2 as opposed to not using the chemical concentration. [Conclusion]Artificially pruning Carmona microphylla could be replaced by spraying certain concentrations of paclobutrazol and CCC, as well as their mixture, which could save the cost production.