SHA Fei,YANG Hainiu,LIU Fang,et al.Effects of Round Pruning on Multiple Rounds of Flowering of Lagerstroemia indica[J].Northern Horticulture,2020,44(20):77-82.[doi:10.11937/bfyy.20194157]
轮次修剪对紫薇多轮开花的影响
- Title:
- Effects of Round Pruning on Multiple Rounds of Flowering of Lagerstroemia indica
- Keywords:
- Lagerstroemia indica; round trimming; pruning time; pruning intensity; multi-round flowering
- 文献标志码:
- A
- 摘要:
- 以多年生独杆紫薇地栽苗为试材，采用修剪强度和修剪时间双因素随机区组试验设计，随后进行轮次修剪，研究其对紫薇多轮开花的影响，以期为轮次修剪技术调控紫薇花期提供参考依据。结果表明：修剪强度和修剪时间对紫薇修剪后萌芽和开花均具有极显著性影响，二者组合间具有显著性差异；修剪时间对紫薇修剪后的萌芽期、现蕾期、初花期、盛花期等主要物候期的影响较大；对紫薇进行轮次修剪可让紫薇不间断地有4轮盛花期，花期可持续81 d，与不修剪的紫薇相比可延长51 d，其中以7月19日中度剪梢+8月2日中度剪梢+8月23日对7月19日中度剪梢萌发花枝花后剪花序这种轮次修剪处理组合能获得最佳的4轮开花状态。研究证明，在紫薇生长期采用轮次修剪的方法能有效延长花期，增加紫薇的园林观赏价值。
- Abstract:
- The perennial single-stem Lagerstroemia indica plants when grown outdoors were used as experimental materials.The two-factor randomized block test design of pruning intensity and pruning time and subsequent round trimming were carried out to study its effect on the multi-round flowering of Lagerstroemia indica.Flowering times of Lagerstroemia indica regulated by round pruning technique would provide a theoretical basis.The results showed that the pruning intensity and pruning time had significant effects on the germination and flowering of Lagerstroemia indica.And there was a significant difference between the two combinations.The pruning time had a greater impact on the main phenological periods,such as germination stage,squaring stage,initial flowering stage and full bloom stage after the pruning of Lagerstroemia indica.Round pruning of Lagerstroemia indica had four rounds flowering.And the flowering period lasted for 81 days without interruption,which could be extended by 51 days by comparing with the untrimmed plant.The conbination which was composed of medium-sized cutting shoots on 19th July,medium-sized cutting shoots on 2nd August and cutting inflorescence on 23rd August of the medium-sized cutting shoots branches of 19th July could obtain the best fourrounds flowering.In conclusion,the method of round trimming in the growth stage of Lagerstroemia indica could effectively prolong the flowering period and increase the ornamental value of Lagerstroemia indica.
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备注/Memo
第一作者简介：沙飞（1977-），男，本科，高级工程师，现主要从事园林植物生理调控等研究工作。E-mail:caigoubu1977@163.com.责任作者：叶要妹（1965-），女，博士，教授，现主要从事园林植物栽培与育种等研究工作。E-mail:yymld@mail.hzau.edu.cn.基金项目：国家自然科学基金资助项目（31972441）；校企（华中农业大学+武汉市花木公司）合作资助项目（707118111）。收稿日期：2019-11-04