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基质类型与生长调节剂处理对红豆树扦插生根的影响

Effects of Medium Types and Growth Regulators on Cuttage Rooting of Ormosia hosiei

  • 摘要: 为建立适合四川的红豆树扦插技术体系,本研究采用四川种源红豆树于四川省南部泸州市泸县玉蟾山开展扦插试验,分析红豆树扦插生根过程中可溶性糖含量与氧化酶(PPO、POD、NAAO)活性的变化,并揭示基质类型、生长调节种类、生长调节剂浓度、生长调节剂处理时间对红豆树扦插生根的影响。结果表明生长调节剂处理组与对照组穗条生根过程中可溶性糖含量、PPO、POD活性均为先升高后下降,NAAO活性均为先下降后升高,生长调节剂处理组变化拐点早于对照组;生长调剂种类、基质类型、生长调节剂浓度、生长调节剂种类和浓度交互作用、生长调节剂种类和处理时间交互作用对红豆树生根率均有极显著影响;纯蛭石基质的生根率、新梢长均值最大,体积比75%蛭石+25%珍珠岩基质粗根数均值最多;ABT和NAA的生根率均值较高,ABT相较于NAA其新稍长和鲜重均值更大;在ABT处理的组合中,高浓度(800 mg/L)和低处理时间(10 min、30 min)的生根率均值更高。本研究表明通过生长调节剂处理可以加快穗条可溶性糖含量与氧化酶活性的动态变化过程,从而促进生根。通过均值比较筛选的红豆树的扦插最适因素水平组合为采用蛭石基质,使用800 mg/L ABT处理10~30 min。

     

    Abstract: To establish a suitable cutting technology system for Ormosia hosiei in Sichuan, this study conducted a cutting experiment with Sichuan-sourced O. hosiei in Yuchen Mountain, Luzhou City, Lu County, Sichuan Province. The changes of soluble sugar contents and oxidase (PPO, POD, NAAO) activities during rooting were analyzed. The variance experimental design was used to analyze the effects of meduim, growth regulator, growth regulator concentration, and treatment time on cuttage rooting. The results showed that during the rooting process of cuttings in both the growth regulator treatment group and the control group, the levels of soluble sugar contents, PPO and POD activities initially increased and subsequently decreased, while NAAO activities showed an opposite trend. The inflection points for these changes occurred earlier in the growth regulator treatment group compared to the control group. The medium, growth regulators, growth regulator concentration, as well as the interactions between growth regulator and concentration, and between growth regulator and treatment time, had highly significant effects on the rooting rate. The highest rooting rate and average length of new shoots were observed in the pure vermiculite medium, while the largest average number of thick roots was found in the medium with a volume ratio of 75% vermiculite and 25% perlite. Both ABT and NAA resulted in relatively high average rooting rates, with ABT showed greater average lengths of new shoots and fresh weight compared to NAA. Among the ABT treatment combinations, higher concentrations (800 mg/L) with shorter treatment times (10 min, 30 min) yielded higher average rooting rates. Research indicated that the dynamic changes in soluble sugar contents and oxidase activities within cuttings could be expedited through the application of growth regulators, thereby enhancing root formation. Through mean comparison analysis, the optimal combination of factors for O. hosiei cuttings is determined to be the use of vermiculite as the medium coupled with an 800 mg/L ABT treatment for 10 to 30 minutes.

     

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