• Korean Journal of Environment and Ecology
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• v.29 no.6
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• pp.842-849
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• 2015

This study investigated the effects of rare-earth fertilizer on the shoot cuttings' rooting of Vitex rotundifolia L. and Tamarix chinensis Lour. The shoot cutting test was carried in 2008 and the main results are summarized as follows. The rate of rooting and the average roots increased in both number and length when rare-earth fertilizer is treated in V. rotundifolia and T. chinensis in comparison to those of the untreated control plot. In particular, when rare-earth fertilizer is diluted with water 1/2500, the rooting outstandingly increases. This result is almost similar to the effect of the rooting stimulant, IAA. Although there is no differentiation in its rooting rate according to the density, the rooting of T. chinensis shows a 100 percent effect on in the entire treated plot but not in the untreated control plot, so it is usable as a rooting stimulant. As for shoot cuttings' rooting, depending on the time immersed in diluted solution of rare-earth fertilizer, both V. rotundifolia and T. chinensis showed relatively higher percentages in all treatment plot immersed for 60 minutes than for 10 minutes. In conclusion, considering the results of the rooting percentage and the average number and length of roots of V. rotundifolia and T. chinensis, the shoot cuttings' rooting appeared higher in percentage when they were immersed in the rooting stimulant for sixty minutes with a lower density than 1/2500. This result shows that rare-earth fertilizer can be utilized as an alterative for IAA rooting stimulants currently available in the market.

• FLOWER RESEARCH JOURNAL
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• v.19 no.4
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• pp.202-205
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• 2011

This study was conducted to determine the effects of several rooting promoter treatments on rooting of Corylopsis coreana cutttings for mass production. In first year experiment, no effect of rooting promoters was observed in hardwood cuttings taken on March 20. However, In softwood cuttings of June 20, rooting potential was greatly increased by IBA $100mg{\cdot}L^{-1}$ dipping treatment for 24 hours. Particularly, IBA $100mg{\cdot}L^{-1}$ 24 hour dipping treatment greatly shortened the days required for the rooting. In second year experiment, the result of first year was reconfirmed. Almost of all the cuttings (97.8% of rooting rate) were well rooted after only 30 days after cutting by IBA $200mg{\cdot}L^{-1}$ 24 hour dipping treatment. In this treatment, numbers and length of root were also prominent compared with any other treatment results.

• Korean Journal of Plant Resources
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• v.23 no.4
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• pp.368-373
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• 2010

Juniperus chinensis var. sargentii Henry is a short and creeping evergreen shrub which reaches about 60 cm in height and only occurs in the northeast Asia and in the top of high mountains over the Korea. The Korea Forest Service protects it strictly by law since J. chinensis var. sargentii is an eccentric plant and possibly may be exterminated soon in Korea. This study was carried out to develop the propagation technique by cutting for conservation of genetic resources of J. chinensis var. sargentii. The rooting responses of branch cuttings, obtained from hard(May) and semi-hard wood shoots (August) to four growth regulators, namely, IAA, IBA, NAA and Rooton(exceptionally powder method) applied at various concentrations(0, 100, 200, 500, 1000 and 2000 $mgL^{-1}$) were examined in mixed soil media. Rooting rate showed significant difference between cutting times, among kinds and among concentrations of growth regulators. The optimum cutting time was April to May in hardwood cutting. The application of IBA 1000 $mgL^{-1}$(rooting rate : 36.4%) was most effective in callus formation and rooting of cutting. Relatively, rooting of cutting of the control taken in May was 30.4%. Root characteristics such as number, length and diameter of root were not significantly affected by kinds and concentrations of growth regulators in hardwood cutting.

• Journal of Korean Society of Forest Science
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• v.83 no.2
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• pp.205-210
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• 1994

This study was conducted to develop a method of mass production by cutting of superior genotypes of Larix leptolepis and to examine the effects of ortet age, clone, crown position, and an applied plant growth substance upon the rooting of cuttings. Four different ortet ages, 2, 8, 16 and 30 years and three levels of root-promoting substances, indole butyric acid(IBA), at 1000, 2000, and 5000ppm were employed. Greenwood cuttings were taken from mother trees in late July and rooted for three months in rooting medium containing peatmoss : vermiculite : perlite(1 : 1 : 1 by volume). with temperature controlled at $20-25^{\circ}C$, humidity by intermittent misting and light by partial shading in the greenhouse. Cuttings treated with 1000ppm IBA showed highest rooting, with 80%, 71%, 52%, 25% for 2-, 8-, 16-. 30-year-old ortet, respectively. Untreated cuttings showed rooting of 52%, 48%, 36%, 20% for the ortet age of 2, 8, 16, 30 years, respectively. The average number of adventitious roots decreased with increasing ortet age from 2 to 30 years, whereas IBA treatment increased the number of roots in all ages. A variation in rooting among 20 clones tested was observed. The 4 clones, Chungnam 6, and 7 and Chonbuk 1, and 9 showed good rooting of about 67%, while Kangwon 49 showed boor rooting of 40% at 1000ppm IBA treatment. When crown position was compared, cuttings taken from middle crown showed highest rooting of 60%, while cuttings from upper crown showed lowest rooting of 53%.

• Journal of Practical Agriculture & Fisheries Research
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• v.17 no.1
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• pp.145-155
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• 2015

To investigate the practicality of a small scale softwood propagation plastic film tent and the rooting promoting effect of indole-3-butyric acid(IBA) for northern highbush blueberry, softwood cuttings of 3 varieties (Duke, Elizabeth, Elliot) were made after dipping in the IBA solutions of 100ppm, 300ppm, 500ppm, 1,000ppm for 2 hour, and 3,000ppm for 20 seconds, respectively. Two-way ANOVA confirmed the significant differences in the percentage of rooting of cutting, longest root length and rooting volume index (RVI) induced by IBA treatment, as well as the percentage of rooting of cutting and RVI among examined varieties. In particular, the highly significant difference was observed in th RVI for IBA treatment. However, there was no interactions between the auxin treatments and varieties. Spontaneous rooting ability (control) depends on the varieties, showing that the lowest rooting ability was observed in the 'Duke' (45%) followed by 'Elliot'(85%) and 'Elizabeth' (90%). In addition, the rooting of the examined 3 varieties were enhanced by both of short time (20sec) dipping treatment of low level solutions, and long time (2hr) dipping treatment of high level solution, with the remarkably promoted rooting of the 'Duke' cuttings.

• Proceedings of the Korea Forestry Energy Research Society Conference
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• 2006.05a
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• pp.21-23
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• 2006

• Journal of agriculture & life science
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• v.45 no.4
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• pp.73-80
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• 2011

This study was conducted to elucidate the best cutting condition in propagation of Juniperus chinensis var. sargentii in respect of survival rate, rooting rate, and early growth after cutting via process of cutting time, cutting media, cutting type and growth regulators. As for cutting time, rooting rate was 68.3% on April, which was higher than 39.5% on May and 32.5% on June. The best cutting media was stream sand of rooting rate 72.7%. Those of mixed soil and decomposition were 40.1% and 27.5% each. The effect of growth regulators was different according to the kind of cutting media. There was no effect on stream sand media which showed the highest rooting rate, while it was very effective on the media of decomposition of granite, which rooting rate showed the lowest. Hardwood as cutting materials showed somewhat higher survival and rooting rate compared to semi-hardwood. The cutting with hardwood condition to stream sand on April, it is regarded to be the most effective condition for Juniperus chinensis var. sargentii to increase survival and rooting rate. Therefore in this experiment it is considered that the best season cutting is April, and the most useful media and plant materials stream sand, and hardwood respectively.

• Journal of Sericultural and Entomological Science
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• v.33 no.2
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• pp.63-67
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• 1991

Various concentrations of ${\alpha}$-naphthalence acetic acid(NAA) as a root-promoting substance were tested in hardwood cutting of the mulberry(Morus bombycis Koidz., cultivar : Shinkwangppong) to make clear the callusing effect on the budding and root growth. Budding and shoot growth of cuttings were delayed at high concentrations of NAA within 10 days of callusing. Especially more severe is it at higher than 50ppm. More than 93% of them, however, budded in two weeks when callused at less than 100ppm NAA. Although rooting was accelerated at high concentration of NAA from the bigining of cutting, after that, rooting percentage increased to reach 100% in 35 days of cutting in any concentration except 150ppm with relatively low rooting. Root growth was utmostly accelerated at 50ppm NAA to show the highest amount in number, length and weight of roots per cutting although high concentration of it decreased mean root length.

• The Journal of Natural Sciences
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• v.6 no.1
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• pp.55-64
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• 1993

Experiments were conducted to study the effect of auxins and cultural factors on rooting characteristics in offshoots cutting of Aloe vera. The result obtained were as follows;1. Short offshoots(15-20cm) with rhizome had more roots than that of the removed rhizome, while long offshoots(25-30cm) without rhizome had more roots and heavier root dry weight than short offshoots with rhizome. The highest rooting ability occured when IBA treated 500mg per liter in short offshoots with rhizome, whereas long offshoots without rhizome showed higher rooting ability at the level of 1,000mg/l of IBA and 200mg/I of NAA2. Among three kinds of anxin treated, both IBA and NAA showed better rooting ability than ethychlozate. Root number, root length and root dry weight were higher at 10 min. dipping treatment of IBA 500mg/I for short off-shoots without rhizome and 10 min. dipping treatment of IBA 1,000mg/l for long offshoots with rhizome. Rooting ability of long offshoots was higher than that of short offshoots.3. In addition to IBA 1,000mg/l, 7-day dryness under shading condition increased root number and dry weight of root in offshoots without rhizome. Control treatment lengthened root by increasing drying period under the shading condition.4. The plain soil with mamure had not only higher root dofferentiation but higher root growth of offshoots cutting than the artificial soil.5. Rooting ability in offshoots cutting had a tendency increasing with decrease in shading percentage to natural. Black color poly ethylene film mulching had better rooting ablility than transparency poly ethlene film mulching in offshoots cutting.

• Journal of Korean Society of Forest Science
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• v.82 no.3
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• pp.227-234
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• 1993

This study was carried out to seek for a most effective hastening method of seed germination by Pon-Pon treatment and asexual multiplication method by cutting in Zanthozylum piperitum. The results obtained in this study were as follows : 1. Cold moist stratification under the ground accompanied with Pon-Pon treatment was shown 74.3% of seed germination, which was the most effective one among pretreatment methods with significance at 1% level. 2. Height growth was shown continuous growth pattern and the maximum growth was shown during the period 1 July to 31 July, which corresponds 40.3% of total annual growth. 3. Although no noticeable difference among the kind of plant growth regulator in the rooting rate, there was difference among concentrations with significance at 1% level. 4. In the case of number of primary roots and T/R rate of rooted cuttings, treatment of plant growth regulators was significantly superior to control. 5. T/R rate in rooted cuttings was a high negative correlation (r=-0.7164) with the number of primary roots.