多效唑对绿篱植物大叶黄杨的矮化效果及经济效益分析

目的]为绿篱植物大叶黄杨探索节约型的化学修剪新途径。方法]研究不同浓度多效唑对大叶黄杨的矮化效果和经济效益的影响。结果]单一大叶黄杨绿篱以浓度为6667mg／kg多效唑、用药量500ml／m^2、喷施3次的处理最佳；使用该技术全年节约成本约4．6元／m^2。结论]绿篱植物大叶黄杨喷施一定剂量多效唑可以代替人工修剪，经济效益和景观效益显著。

Analysis of the Dwarfing Effect and Economic Benefit of Paclobutrazol on Hedge Plant Euonymus japonicus

Objective] The research aimed to find out an economical way of chemical pruning for a hedge plant,Euonymus japonicus.Method] The effects of different concentrations of paclobutrazol on the dwarfing effect and the economic benefit of E.japonicus were studied.Result] The optimum combination was as follows:6 667 mg/kg paclobutrazol,drugs dose of 500 ml/m2 and the spraying frequency of 3 times.The cost could be saved by 4.6 yuan/m2 annually by using that technique.Conclusion] Artificial pruning could be replaced by spaying certain concentration of paclobutrazo on E.japonicus.And it had remarkable economic and landscape benefits.