不同时期的铁丝绞缢对光皮树幼树早花早实的促进效果

采用铁丝绞缢法对4年生光皮树幼树主枝进行处理，处理时间分别为6月、7月、8月、9月每月5日和20日。结果表明：不同时期的铁丝绞缢处理均抑制了树高生长，7月份两次处理与对照达到差异显著；不同时期处理均促进了地径的生长，其中7月5日处理与对照达到差异显著；不同时期处理均抑制了冠幅的生长，但与对照未达到差异显著；不同时期处理促进开花效果显著，其中6月20日、7月5日、7月20日三次处理均与对照达到差异极显著。铁丝绞缢法促进光皮树早花早实最佳处理时间为6月底至7月中旬。

Effects of binding with stranded wire in different period on promoting early flowering and fruiting of Swida wilsoniana

Stem of 4-year-old Swida wilsoniana were treated by means of binding with stranded wire on the 5th and 20th of June, July, August, September. The results showed as follows： the height growth was restrained by binding in different periods, and there were sig- nificant difference between test in July and control. The trunk diameter growth was promoted by binding in different periods, and there were significant difference between test on July 5th and control. The crown growth was restrained by binding in different periods, but there were no significant difference between test and control. The effect of binding in different periods on promoting flowering was signifi- cant, and there were highly significant difference between test on June 20th, July 5th, July 20th and control. So the optimal period of binding stem with stranded wire to promote early flowering and fruiting of Swida wilsoniana was from end of June to the middle of July.