不同修剪程度对紫薇新梢生长的影响

[目的]针对紫薇生产中存在的修剪粗放、不合理现象,为紫薇科学、合理的修剪提供依据.[方法]对紫薇进行了极重短截(4 cm短截水平),重短截(8 cm短截水平)和中短截(18 cm短截水平)3种不同程度的修剪试验.[结果]极重短截发枝数最少,重短截次之,中短截最多；极重短截的新稍长度最长,重短截和中短截的相差不多,没有显著性差异；新稍叶片平均数三者相差不大,没有显著性差异；而新稍叶片总数是中短截最多,重短截次之,极重短截最少.[结论]以4 cm极重短截对紫薇生长的影响最佳.此时平均新梢数量2.3个,新梢长度34.8 cm,新梢叶平均数20.0片.

Influence of Different Pruning Degree on Growth of Lagerstroemia indica L. Young Sprout

[Objective] According to the phenomenon of extensive pruning in the production of Lagerstroemia indica L.,the paper provide reasonable pruning basic for Lagerstroemia indica L.[Method] Lagerstroemia indica L.were treated with the extremely pruning(4 cm pruning levels),heavy pruning(8 cm pruning levels) and slightly pruning(18 cm pruning levels).[Result] Txtremely pruning shoot number at least,heavy pruning second,slightly pruning at most;the length of extremely pruning shoot the longest,heavy pruning and slightly pruning have no much difference;average number of new shoot leaves had little difference.The number of slightly pruning was at most,while extremely pruning at least.[Conclusion] The influence of extremely pruning to Lagerstroemia indica L.was the best.The average number of young sprout was 2.3,the length of young sprout was 34.8 cm,average number of young sprout leaves was 20.0.