西北植物学报2024，Vol.44Issue(7)：1064-1072,9.DOI:10.7606/j.issn.1000-4025.20230826
育苗容器对紫叶紫薇容器苗生长、开花及生理的影响
Effects of seedling containers on the growth,flowering,and physiology of purple-leaf Lagerstroemia indica seedlings
摘要
Abstract
[Objective]This study aims to examine the effects of container type and specification on the growth,blooming,and physiology of purple-leaf Lagerstroemia indica seedlings.The goal is to examine the optimal seedling container for the cultivation of purple-leaf L.indica seedlings and to provide basis for effective seedling breeding in containers.[Methods]Taking the excellent new variety'Ebony Embers'of purple-leaf L.indica as research materials.Three type containers,black plastic nutrient cups(C1),white nonwoven beauty planting bags(C2),and black root-control containers(C3),with three specifica-tions(diameter× height,cm)of 16×16(D1),21×21(D2),and 25×25(D3),were selected to set nine treatments.Seedlings under different treatments were measured for growth,flowering,and physiological indexes.[Results](1)Different nursery containers had significant effects on the growth,flowering,and physiology of purple-leaf L.indica seedlings.The growth,root system,biomass,flowering period,flower diameter,inflorescence,soluble protein content,soluble sugar content,relative chlorophyll con-tent,net photosynthesis rate,stomatal conductance,transpiration rate,and other indexes in the same container type were increased with the increase in the specification of the containers.(2)Diameter growth,total root length,total root surface area,total root volume,number of root tips,aboveground dry mass,belowground dry mass,total dry mass,and flowering time were greatest in the C3D3 treatment,which was higher than the smallest C1D1 treatment by 817.12％,108.12％,94.60％,75.66％,144.14％,135.67％,228.45％,164.65％and 34.48％,respectively.Seedling height growth,crowngrowth,leaf area,and in-florescence length and width were the highest in the C1D3 treatment,which was higher than the lowest C1D1 treatment by 116.05％,81.39％,114.95％,70.44％,and 65.79％,respectively.Relative chloro-phyll content and water use efficiency were the greatest in the C3D3 treatment,while soluble protein and soluble sugar content,net photosynthetic rate,and stomatal conductance were the highest in the C1D3 treatment.The intercellular CO2 concentration and water use efficiency did not differ significantly among the treatments.(3)The comprehensive analysis score for each index was as follows:C3D3＞C1D3＞C2D3＞C3D2＞C2D2＞C1D2＞C2D1＞C3D1＞C1D1.[Conclusion]The black root-control container performs well in terms of diameter growth,root growth index,biomass,flowering time and diameter,relative chlo-rophyll content,and net photosynthetic rate.The most suitable container for 2-year-old seedlings of pur-ple-leaf L.indica is the black root-control container with a diameter of 25 cm and a height of 25 cm.关键词
紫叶紫薇/容器苗/容器类型/容器规格/生长/开花/生理Key words
purple-leaf Lagerstroemia indica/container seedlings/container type/container size/growth/flow-ering/physiology分类
农业科技引用本文复制引用
王湘莹,魏溧姣,王晓明,唐丽,曾慧杰,陈艺..育苗容器对紫叶紫薇容器苗生长、开花及生理的影响[J].西北植物学报,2024,44(7):1064-1072,9.基金项目
国家重点研发计划项目(2020YFD1000500) （2020YFD1000500）
湖南省花卉苗木产业发展项目(HH202201) （HH202201）
