|Table of Contents|

Effects of Different Chemical Treatments on Shoot Growth and Plant Type of Ilex verticillata ‘Oosterwijk’

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2024年17
Page:
67-75
Research Field:
Publishing date:

Info

Title:
Effects of Different Chemical Treatments on Shoot Growth and Plant Type of Ilex verticillata ‘Oosterwijk’
Author(s):
LIU Jiaqi1TAO Wenkai1ZOU Yiping12QING Jianchun3HAO Mingzhuo12
(1.College of Forestry and Grassland,Nanjing Forestry University/Soil and Water Conservation,Nanjing,Jiangsu 210037;2.Jiangsu Qing Hao Landscape Horticulture Co.Ltd.,Nanjing,Jiangsu 211225;3.Administrative Examination and Approval Service Bureau of Zhaoyuan City,Zhaoyuan,Shandong 265400)
Keywords:
Ilex verticillataplant growth regulatorscontrol pinscanopy shapingphysiological characteristics
PACS:
S 688
DOI:
10.11937/bfyy.20240597
Abstract:
Taking 2-year-old Ilex verticillata ‘Oosterwijk’ seedlings as the test materials,three agents,namely calcium cyclamate,mepiquat chloride,and potassium phosphite were combined in different concentrations.The treatments were applied via foliar spray when seedlings entered their rapid growth phase.Growth indicators (seedling height,basal diameter,shoot length and thickness,leaf dimensions),photosynthetic parameters (net photosynthetic rate,transpiration rate,stomatal conductance,intercellular CO2 concentration),and physiological indices (SPAD value,MDA content,soluble sugar content,SOD and POD activities) were measured to evaluate treatment effects comprehensively.The results showed that,1) all treatments effectively reduced seedling height and leaf dimensions while increasing basal diameter,shoot thickness,and SPAD value.2) Leaf photosynthetic activity was enhanced across all treatments,as evidenced by increased net photosynthetic rate,transpiration rate,and stomatal conductance,coupled with reduced intercellular CO2 concentration.3) Treatments T1 and T4 induced significant phytotoxicity in leaf development,whereas T2 and T3 demonstrated superior canopy regulation.4) Plants under T2 and T5 treatments exhibited the lowest MDA content and highest SOD and POD activities.T2 and T3 treatments increased soluble sugar content,indicating enhanced stress resistance.5) Membership function analysis revealed treatment efficacy ranking from highest to lowest as follows,T2>T5>T4>T1>T3>T6>CK.In conclusion,for optimal control of seedling height,shoot length reduction,and promotion of vigorous plant growth,T2 treatment (5% calcium cyclamate 1.3 g·L-1+98% mepiquat chloride 0.67 g·L-1) proved most effective,followed by T5 treatment (5% calcium cyclamate 0.67 g·L-1+98% mepiquat chloride 0.3 g·L-1+potassium phosphite 500-fold solution).

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Last Update: 2024-09-24