修剪和多效唑对四药门花矮化效应初探  

Effects of Pruning and Paclobutrazol(PP_(333)) on Dwarfing of Loropetalum subcordatum

作　　者：申长青[1] 洪文君[1] 黄久香[1] 庄雪影[1] 

机构地区：[1]华南农业大学林学与风景园林学院,广东广州510642

出　　处：《广东园林》2016年第1期46-48,共3页Guangdong Landscape Architecture

基　　金：中山市极小种群野生植物之四药门花的拯救保护研究

摘　　要：通过对株形披散杂乱的四药门花进行修剪、喷施多效唑及修剪＋喷施多效唑等3种处理方法对其株形优化效果影响的比较研究,结果表明：处理3个月后,喷施多效唑及修剪＋喷施多效唑处理组的苗木平均净高增量、冠幅、节间长等指标均显著小于对照组,其株高降幅为74.8%~83.2%,冠幅降幅为22.8%~28.0%,节间长缩短49.7%~60.1%,其分枝数也较对照组多。与对照组比较,修剪处理仅对调控株高增长有显著影响。Growth form and shape of Loropetalum subcordatum are irregular and messy. This paper maked a comparison experiment to study dwarfing effects of pruning, spraying of PP333 and pruning ＋ spraying of PP333 on Loropetalum subcordatum. The results shows that the treatments with spraying of PP333 and pruning ＋ spraying of PP333 could obviously decrease the seedling height and crown width, shorten the internodes, and enhance the side branch development. Their height increments are decreased from 74.8% to 83.2%.The crown widths are declined from 22.8% to 28.0%.The branching numbers are increased from 68.6% to 132.3%, and the internodes are shortened from 49.7% to 60.1%. By comparison experiment of control（CK）, pruning treatment only has obvious effects on height increment.

关 键 词：四药门花 园艺修剪 多效唑 矮化效应 珍稀植物资源保护 

分 类 号：S688[农业科学—观赏园艺]