育苗容器对紫叶紫薇容器苗生长、开花及生理的影响
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1.湖南省林业科学院;2.中南林业科技大学林学院

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国家科技攻关计划


Effects of seedling containers on the growth, flowering and physiology of purple-leaf Lagerstroemia indica container seedlings
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The National Key Technologies R&D Program of China

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    摘要:

    【目的】探讨不同育苗容器对紫叶紫薇容器苗生长、开花及生理的影响,筛选出紫叶紫薇容器苗培育的适宜育苗容器,为紫薇容器高效育苗提供理论依据。【方法】以紫叶紫薇优良新品种‘丹红紫叶’为研究对象,设计了不同育苗容器类型和规格共9个处理,测定不同处理对容器苗生长、开花及生理的影响。【结果】(1)不同育苗容器对紫叶紫薇容器苗的生长、开花及生理影响显著,容器苗的生长、根系、生物量、花期、花径、花序、可溶性蛋白含量、可溶性糖含量、叶绿素相对含量、净光合作用速率、气孔导度、蒸腾速率等指标随着育苗容器规格的增大而增加,均达到显著性差异。(2)C3D3处理(直径25 cm、高25 cm黑色控根容器)的地径生长量、总根长、总根表面积、总根体积、根尖数、地上部干重、地下部干重、总干重、花期、都是最大,比最小的C1D1处理(直径16 cm、高16 cm黑色塑料营养杯)分别显著高817.12%、108.12%、94.60%、75.66%、144.14%、135.67%、228.45%、164.65、20d;C1D3处理(直径25 cm、高25cm黑色塑料营养杯)的苗高生长量、冠幅生长量、叶面积、花序长和宽最高,比最低的C1D1处理分别显著高116.05%、81.39%、114.95%、70.44%和65.79%。(3)C3D3处理的叶绿素相对含量、水分利用效率最大,C1D3处理的可溶性蛋白和可溶性糖含量、净光合速率、气孔导度最高;各处理的胞间CO2浓度、水分利用效率之间无显著性差异。(4)黑色控根容器在地径生长量、根系生长指标、生物量、花期和花径、叶绿素相对含量及净光合速率方面表现最佳。(5)各指标隶属函数法综合分析得分排序为:C3D3>C1D3>C2D3>C3D2>C2D2>C1D2>C2D1>C3D1>C1D1。【结论】紫叶紫薇2年生苗的最适宜育苗容器是直径25 cm、高25 cm黑色控根容器。

    Abstract:

    【Objective】 This study aims to examine how different seedling containers affect the growth, blooming, and physiology of purple-leaf Lagerstroemia indica seedlings. The goal is to determine the optimal seedling containers for growing purple-leaf L. indica container seedlings and to lay the groundwork for effective vetch container seedling breeding. 【Methods】 Taking the excellent new variety of Lagerstroemia indica 'Ebony Embers' as the research object, a total of 9 treatments with different types and specifications of seedling containers were designed to determine the effects of different treatments on the growth, flowering, and physiology of container seedlings. 【Results】 (1) Different nursery containers had significant effects on the growth, flowering, and physiology of .purple-leaf L. indica container seedlings. The growth, root system, biomass, flowering period, flower diameter, inflorescence, soluble protein content, soluble sugar content, relative chlorophyll content, net photosynthesis rate, stomatal conductance, transpiration rate, and other indexes of the container seedlings increased with the container specifications, and all of them reached a significant difference. (2) The C3D3 treatment(25 cm diameter, 25 cm high black root control container) exhibited the greatest in-ground growth, total root length, total root surface area, total root volume, number of root tips, above-ground dry weight, below-ground dry weight, total dry weight, and flowering period. These results were significantly greater than the smallest C1D1 treatment(16 cm diameter, 16 cm high black plastic nutritional cups) by 817.12%, 108.12%, 94.60%, 75.66%, 144.14%, 135.67%, 228.45%, 164.65, 20d; additionally, the C1D3 treatment had the highest growth in terms of seedling height, crown growth, leaf area, inflorescence length, and width, which were significantly greater than the lowest C1D1 treatment by 116.05%, 81.39%, 114.95%, 70.44%, and 65.79%, respectively. (3) The C3D3 treatment had the highest relative chlorophyll content and water use efficiency. The C1D3 treatment(25 cm diameter, 25 cm high black plastic nutritional cups) had the highest soluble protein and soluble sugar content, net photosynthesis rate, and stomatal conductance; there were no appreciable differences between the treatments in terms of intercellular CO2 concentration and water use efficiency. (4) In terms of biomass, blooming stage and diameter, relative chlorophyll content, net photosynthetic rate, and diameter growth, black root-control containers outperformed other container types. (5) The comprehensive analysis score ranking for each index affiliation function method is as follows: C3D3>C1D3>C2D3>C3D2> C2D2>C1D2> C2D1>C3D1>C1D1, the most suitable seedling containers for the cultivation of 2-year-old purple-leaf L. indica container seedling cultivation are the 2.5cm diameter and 2.5cm high black root-control containers.

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王湘莹,魏溧姣,王晓明,等.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

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  • 收稿日期:2023-12-21
  • 最后修改日期:2024-03-10
  • 录用日期:2024-03-11
  • 在线发布日期: 2024-05-31
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