• 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 Bio-Environment Control
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• v.6 no.3
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• pp.225-234
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• 1997

This study was carried out to investigate the native distribution of wax myrtle (Myrica rubra) in Cheju Province and its propagation method. Wax myrtle is heavily distributed at 100 to 400m above sea level of Donhong-chun and Hyodon-chun which is bordered by Youngchon-dong of Seogwipo City and Haryeri of Namcheju county. BA, IBA, Kinetin, IAA, and GA3 were applied to promote rooting of cutting but were ineffective in promoting rooting. Treating cuttings with both AgNO,1 which removes rooting inhibitor, tannin and growth regulators such as BA, IBA and Kinetin were also ineffective in promoting rooting. Incubating seeds at 4$0^{\circ}C$ for 30 days resulted in 39％ germination. There was distinct difference in leaf shape between seedlings and mature trees.

• Journal of Forest and Environmental Science
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• v.29 no.2
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• pp.165-172
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• 2013

The habitats characteristics of Rhododendron micranthum Turcz. were investigated to compile basic data for conservation and restoration. Natural habitats were located at altitudes of 100-500 m with inclinations of $10-35^{\circ}$. Rhododendron micranthum population was classified into Pinus densiflora dominant population. In the study sites, soil organic matter, total nitrogen, available phosphate, exchangeable potassium, exchangeable sodium, exchangeable calcium, exchangeable magnesium, cation exchange capacity and soil pH were 4.10-8.64%, 0.18-0.46%, 8.69-26.70 $mgkg^{-1}$, 0.10-0.23 $cmol^+kg^{-1}$, 0.06-0.10 $cmol^+kg^{-1}$, 0.85-4.10 $cmol^+kg^{-1}$, 0.24-0.64 $cmol^+kg^{-1}$, 12.76-20.90 $cmol^+kg^{-1}$, 4.34-5.15. Rooting rate is too low, cutting propagation, breeding methods are not good. Also, this study was investigated seed germination of R. micranthum depends on soaking treatment. R. micranthum was soaked with tap water for four days, the average values of germination day were represented of 70%/1 week.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.44 no.3
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• pp.201-206
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• 1999

For the mass production of plug seedlings in cultivar ‘Dejima’ potato (Solanum tuberosum L.) the optimal apical cutting diameter for rooting and rapid multiplication of stem cuttings in hydroponics were determined. In addition, the best planting date was predicted to increase tuber yield of plug seedlings at fall cropping in Cheju-Do, Korea. Days to initial rooting decreased as the cutting diameter was reduced. Plant height, leaf number, root length and root weight per plant were favorable as the cutting diameter was small. The ideal cutting diameter was 1-2 mm in this experiment. In the hydroponic cultures, the Japanese standard (JS) nutrient solution was the most effective for multiplication of stem cuttings. It was able to propagate more than 20 times a month from a single mother plant. Viability of plants, which were derived from plug seedlings using stem cuttings, was excellent when transplanted to the field. The number of tubers and tuber yield in both of the plug seedlings and seed potato planting plots were high when planted on 25 August. The number and yield were reduced when planted on 15 August, 5 September and 15 September. The degree of decrease of tuber yield in the plug seedling planting plot however, was lower than that of seed potatoes when the planting date was late. In the case of small tubers (under 30 g), the number of tubers and tuber yield were evidently increased in the seed potato tuber planting plot; the yield of large tuber (over 80g) in the plug seedling planting plot was higher than that of the seed potato. The total tuber yield per plant in the plug seedling planting plot was less than that of the seed potato; therefore, in order to increase tuber yield it was necessary to increase field plant density.

• Journal of Korean Society of Forest Science
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• v.40 no.1
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• pp.43-50
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• 1978

The elder berry was known to the rich in natural food colour resources and used in as for making wine, confectionary, perfumes, natural food colour, making elder berry juice, jelly, jam and medicinal properties or oils. In the present study, wish was to find the effect of various factors on the success of the vegetative propagation of elder berry by means cutting in the exposed field and green house was carried out and those obtained results can be summarized as follows. 1. Cuttings with dormant cutting stocs in the polyethylen house with heating and water mist spray resulting 100 percent survival. And temperature and the relative humidity in which fraim during the cutting season were around $20{\sim}25^{\circ}C$ and 70-90% respectively and in case as more significant other of the 1% Level. 2. With five varieties tested, resulting 93.8 percent survival, The F. value is not significant. 3. With four organs of cutting stock tested resulting 57.5 percent survival on the cuttings with two knodes of dormant cutting stock served as better cutting stock than others. The F. value is more significantly 1% Level. 4. Dormand bud served as possible cutting stock was found to be 17.66 survival percentage. 5. Both earlier and later stage of germinated Leaves with soft wood cutting stock poor cuttings, and the degree of development of 15th June cutting stock was optimum stage on the principal factor governing the success of cutting in the soft wood cutting showing 54% survival. The F. value is more 1% Level significant.

• Horticultural Science & Technology
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• v.30 no.2
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• pp.129-136
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• 2012

This study was conducted to develop an efficient mass propagation method for the mature $Prunus$ $yedoensis$ Matsumura (43 to 58 years old). Cutting was conducted depending on cutting time, auxin treatments (IBA and NAA treatments mixed with talc powder), and cuttings position on shoots in a plastic house equipped with a fog system without heating. Rooted cuttings were transplanted to a nursery bed, and their growth characteristics were investigated in order to check whether the cuttings are successful or not for roadside tree planting. The average rooting rate was highly significant ($P$ < 0.0001) in all treatments: cutting on June 1st (61.4%) was more than two times greater in rooting rate than that on August 1st (23.6%); IBA 1,000 $mg{\cdot}L^{-1}$ (90.8%) and IBA 500 $mg{\cdot}L^{-1}$ (89.2%) showed much greater rooting rates than those of the other treatments; upper part of the cuttings treated with IBA 1,000 $mg{\cdot}L^{-1}$ showed the highest rooting rate, 96.7%. The interactions among treatments in the average rooting rate were also significant. There were significant differences ($P$ < 0.0001) among the auxin treatments in the survival rate of leafed cuttings transplanted to a nursery bed. The average survival rate was 46.5%, and IBA 1,000 $mg{\cdot}L^{-1}$ treatment was the highest in leafed cuttings 79.2%, but most of leafless cuttings were dead. There were significant differences ($P$ < 0.0001) among the cuttings, grafts, and in the seedlings height, diameter at root collar, the number of roots, branches, and leaves, etc., and the cuttings was the best. We can expect a possibility of mass propagation of improved $P.$ $yedoensis$ Matsumura and a high planting survival rate through the transplanting of cuttings to a nursery bed in which the cuttings should be the following conditions: cutting in June to July, use of the upper part of cuttings, IBA treatment, and rooting in August in a cutting-greenhouse equipped with a fog system.

• Journal of the Korean Society for Precision Engineering
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• v.22 no.4
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• pp.37-43
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• 2005

Real time monitoring of exit burr formation is critical in manufacturing automation. In this paper, acoustic emission (AE) was used to detect the burr formation during drilling. By using wavelet transform (WT), AE data were compressed without unnecessary details. Then the transformed data were used as selected features (inputs) of a back-propagation artificial neural net (ANN). In order to validate the in process AE monitoring system, both WT-based ANN and cutting condition (cutting speed, feed, drill diameter, etc.) based ANN outputs were compared with experimental data.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.15 no.4
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• pp.22-28
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• 2006

Detection of exit burr is very important in manufacturing automation. In this paper, acoustic emission(AE) was used to detect the burr formation during milling. By using wavelet transformation, AE data was compressed without unnecessary details. Then the transformed data were used as selected features (inputs) of a back-propagation artificial neural net. In order to validate the proposed scheme, the wavelet based ANN results were compared with cutting condition(cutting speed, feed, depth of cut, etc.) based ANN results.

• Weed & Turfgrass Science
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• v.7 no.3
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• pp.275-282
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• 2018

Miscanthus species are known as a genus of eco-friendly and low-maintenance cost ornamental grasses. Plug and cutting methods were tested for multi-propagation of most promising ornamental Miscanthus species in greenhouse and field plot. The plug formation period with three different cell sizes with four cultivars (M. sinensis 'Andersson', 'Strictus', 'Gracillimus', 'Variegatus') were evaluated the seedling development stages with two irrigation types of the over-head and the bottom watering in greenhouse and field plot afterward during 2015-2016 season. In seedling plug test, the size of tray cell affected the plug formation. Bottom irrigation resulted positively on plant height, weight, root and tiller development compared with the over-head irrigation. Plug cell size affected the plant growth in the field after transplanting. All of the 3 Miscanthus species showed higher rates of successful propagation at the lower nodes before inflorescence formation (vegetative growth stage). To analyze the survival factors of M. xgiganteus cutting, the cutting time, node part, and culm diameter were tested as independent variables with the binary logistic model. The survival probability was influenced by node part and culm diameter significantly. The third and fifth node parts showed 0.12 (8X higher failure probability) and 0.02 (50X higher failure probability) times less survival probability. It means the survival probability will be increased by using older and lower part of cuttings during a vegetative growth stage before inflorescences of M. xgiganteus.

• FLOWER RESEARCH JOURNAL
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• v.18 no.1
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• pp.23-28
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• 2010

This study was conducted to determine the optimal rooting media composition and plant growth regulators for the mass production of new three cultivars in Dendrobium. Rooting medium experiments showed that shooting rate of 'Fizz' was the highest in perlite (Per) and vermiculite (V) mixture (1 : 1, v/v). Rooting rate of 'Prince' was 10% in the same treatment 60 days after cutting, while those of 'Candy' and 'Fizz' showed no shooting. With various kinds of auxin and different levels of concentrations, shooting rate in the other cultivars except 'Candy' increased highly at 60 days after cutting. Whereas, there were no differences between control and treatment except that of 'Fizz' with 200 ppm of IBA treatments showing 86.7%. Rates of cutting with leaves of 'Candy' and 'Fizz' were fairly high with 200 ppm of IBA compared to the control. Rate of rooting of 'Prince' was twice with 200 ppm of IBA or 50 ppm of NAA compared to the control. With various kinds of cytokinin and different concentrations, shooting rate of 'Candy' was 20% with 50 ppm of BA at 60 days after cutting; however, that of 'Fizz' increased in all treatments in 30 days after cutting and reached 100% with 200 ppm of BA compared to the control which was 77% at 60 days after cutting. Kinetin treatment had little effect on shooting rate compared to control at all concentrations. Treatment with 200 ppm of BA had clear effect on the rate of cutting with leaves of 'Fizz' and 'Prince', which was similar to shooting rate. However, the same treatment of BA had no effect on the rooting rate in all cultivars.