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Cut-off in their prime? Response of two landscape shrubs to different levels of root pruning, during active and quiescent growth phases
The Journal of Horticultural Science and Biotechnology ( IF 1.9 ) Pub Date : 2020-06-01 , DOI: 10.1080/14620316.2020.1749140
Nor Idzwana Mohd Idris 1 , Ross W.F. Cameron 2
Affiliation  

ABSTRACT Shrubs have an important role in the future design of urban landscapes. Due to city-densification and pressure on space, shrubs are increasingly preferred over trees for urban amenity plantings. In contrast to trees, however, relatively little information exists on how shrubs adapt to urban stress. This includes their responses to physical root injury, that might occur through trenching or transplanting activities. Two shrub taxa, Philadelphus coronarius ‘Aureus’ and Euonymus fortunei ‘Silver Queen’, were used to investigate the effects of severity and time of root injury on plant viability, and how additional fertiliser influenced recovery. A novel ‘split-pot’ system was developed to differentiate where root injury was induced. Results showed that both taxa were relatively resilient to root-pruning, although root injury was more detrimental during active growth than when plants were quiescent. This re-enforces the notion that transplanting of shrubs should be avoided in the summer. Shoot development was not more detrimentally affected by severe root-pruning compared to light pruning. There was also evidence that uniform severe pruning across the root-ball stimulated stronger root-regeneration compared to root systems differentially injured. No consistent response to fertiliser was noted. Results have implications for the resilience and management of shrubs within the urban landscape.

中文翻译:

在他们的巅峰时期被切断?在活跃和静止生长阶段,两种景观灌木对不同程度的根修剪的响应

摘要 灌木在未来的城市景观设计中具有重要作用。由于城市密集化和空间压力,在城市设施种植中,灌木比树木越来越受欢迎。然而,与树木相比,关于灌木如何适应城市压力的信息相对较少。这包括他们对可能通过挖沟或移植活动发生的物理根损伤的反应。两种灌木分类群 Philadelphus coronarius 'Aureus' 和 Euonymus Fortunei 'Silver Queen' 被用来研究根损伤的严重程度和时间对植物活力的影响,以及额外施肥如何影响恢复。开发了一种新的“分裂锅”系统来区分诱导根损伤的位置。结果表明,两种分类群对剪根都具有相对弹性,尽管在活跃生长期间根损伤比植物静止时更有害。这再次强化了应避免在夏季移植灌木的观念。与轻度修剪相比,严重的根修剪不会对枝条发育产生更不利的影响。还有证据表明,与不同程度受损的根系相比,对根球进行均匀的严重修剪刺激了更强的根再生。没有注意到对肥料的一致反应。结果对城市景观中灌木的恢复力和管理有影响。还有证据表明,与不同程度受损的根系相比,对根球进行均匀的严重修剪刺激了更强的根再生。没有注意到对肥料的一致反应。结果对城市景观中灌木的恢复力和管理有影响。还有证据表明,与不同程度受损的根系相比,对根球进行均匀的严重修剪刺激了更强的根再生。没有注意到对肥料的一致反应。结果对城市景观中灌木的恢复力和管理有影响。
更新日期:2020-06-01
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