珍稀濒危植物领春木扦插繁殖技术
Cutting Propagation Techniques of Rareand Endangered Plant Euptelea pleiospermum
为优化珍稀濒危树种领春木(Euptelea pleiospermum)扦插生根困难的技术问题,以领春木1年生半木质化枝条为扦插材料,采用正交试验设计,通过对生根率、根系效果指数等指标的测算,探究不同基质、外源激素、激素质量浓度、处理时间对领春木扦插生根的影响,并应用隶属函数值法对16个处理组合(基质类型、激素种类、质量浓度、激素处理时间4个因素,每因素4个梯度)的生根效果进行综合评价,为领春木的扦插扩繁提供技术参考。4种扦插基质配比(100%泥炭;V(泥炭)∶V珍珠岩= 5∶2;V(泥炭)∶V(蛭石)=5∶2;V(泥炭)∶V(珍珠岩)∶V(蛭石)=5∶2∶2,V代表体积比)中,泥炭∶珍珠岩=5∶2生根效果最好,其生根率、平均根长、最长根长、平均生根数、根平均直径分别达56.67%、6.74 cm、7.47 cm、5.73条/穗、0.31 cm,根系效果指数为1.74,远高于其他3种基质配比(P<0.05)。正交试验结果表明,用质量浓度1.0 g/L的生根粉(ABT-1)速蘸5 s的插穗生根效果最佳,生根率达65.73%,平均根长7.38 cm,平均生根数7.59条/穗,最长根长7.52 cm,根平均直径0.35 cm,根系效果指数为1.87。综合分析表明,生根效果最佳的处理组合为泥炭、珍珠岩体积比5∶2为基质、在质量浓度为1.0 g/L的ABT-1号中速蘸5 s的平均隶属函数值最大,最低处理组合为泥炭、蛭石体积比5∶2为基质、在质量浓度为0.8 g/L的吲哚丁酸(IBA)中浸泡12 h。
In order to optimize the technical problems of cutting rooting of rare and endangered tree species Euptelea pleiospermum, using 1-year-old semi lignified branches of E. pleiospermum wood as cutting materials, an orthogonal experimental design was adopted to explore the effects of different substrates, exogenous hormones, concentrations, and treatment times on the rooting of E. pleiospermum wood cutting through the calculation of rooting rate, root effect index, and other indicators (Matrix type、hormone type, mass concentration, hormone treatment time were four factors, and each factor had four gradients). The membership function numerical method was used to comprehensively evaluate the rooting effect of 16 treatment combinations, providing technical reference for the expansion of E. pleiospermum wood. Among the four cutting substrate ratios (100% peat;V (peat)∶V (perlite)=5∶2; V (peat)∶V (vermiculite)=5∶2; V (peat)∶V (perlite)∶V (vermiculite)=5∶2∶2, V represents the volume ratio), peat: perlite (5∶2) had the best rooting effect, with a rooting rate, average root length, longest root length, average root number, and average root diameter of 56.67%, 6.74 cm, 7.47 cm, 5.73 stripes/ears, and 0.31 cm, respectively. The root effect index reached 1.74, which was much higher than the other three substrate ratios (P<0.05). The results of the orthogonal experiment showed that the rooting effect of cuttings soaked with ABT-1 at a concentration of 1 g/L for 5 seconds was the best, with a rooting rate of 65.73%, an average root length of 7.38 cm, an average number of 7.59 stripes/ears, a maximum root length of 7.52 cm, an average root diameter of 0.35 cm, and a root effect index of 1.87. Comprehensive analysis showed that the optimal treatment combination for rooting effect was (peat to perlite volume ratio 5∶2 as substrate, with the highest average membership function value in ABT-1 at a medium speed of 1.0 g/L for 5 seconds), and the lowest treatment combination was (peat to vermiculite volume ratio 5:2 as substrate, soaked in 0.8 g /L indole butyric acid (IBA) for 12 hours.
领春木 / 扦插繁殖 / 外源激素 / 隶属函数 / 生根效果
Euptelea pleiospermum / cutting propagation / exogenous hormone / subordinate function / rooting effect
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