• Korean Journal of Plant Resources
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• v.9 no.3
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• pp.261-267
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• 1996

This experiment was carried out to investigate the effects of various fertilizers on the growth and yield of tree peony Moutan cortex RADICIS from 1990 to 1994. The paeonol content, a main medical ingredient of tree peony, was 0.5% in the control, and the contents of the chemical fertilizer(N-P-K) and the two-kind compound fertilizer treatments were $0.26{\sim}0.41%$, and those were lower than $0.40{\sim}0.45$ of the compost, the fowl dropping manure and the organic fertilizer treatments. The weights off dry root(radix) rind were increased by 42% in the fowl dropping manure treatment and by 49% in the compost treatment compared with 151kg/10a in the control. All things considered, compost, fowl dropping manure and organic fertilizer were more effective than chemical fertilizers for the culture of tree peony.

• Korean Journal of Medicinal Crop Science
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• v.10 no.1
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• pp.24-28
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• 2002

Effect of pretreatment processing (peeling time, drying temperature, sample type) on the quality of hot air drying peony roots was investigated. Peony roots were peeled for 0, 10, 20, 30, 60, 90 and 120 minute in the peeling machine after water washing. Sample types were whole or cut (thickness of 3mm). Temperatures of hot air drying were 30, 40, 50 and $60^{\circ}C$ The level of water contents in dried sample was $14{\sim}15%$. Drying time was muth reduced as the peeling time, cutting sample types and higher temperature. Contents of paeoniflorin were maintained highest amount (3.48%) in the non-peeling cut sample dried at $30^{\circ}C$ and lowest amount (2.29%) in the 120min-peeling whole one dried at $60^{\circ}C$. Skin color of dried peony roots was heavily discolored in the sample of non-peeling whole type dried at $60^{\circ}C$ and the color was dark brown $({\Delta}E\;was\;46.1)$. When considering shortening of drying time, preservation of active compounds and maintenance of color, the best pretreatment method of drying in peony roots was non-peeling, cut type processing.

• Proceedings of the Korean Society of Crop Science Conference
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• 1995.05a
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• pp.110-111
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• 1995

• Korean Journal of Medicinal Crop Science
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• v.6 no.4
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• pp.245-250
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• 1998

This research was carried out to investigate the effective methods of browning inhibition on Paeonia lactiflra Pall during hot air dehydratin. After drying for 36 hrs without pretreatment and with briquet fumigation moisture contents of Paeonia lactiflora Pall. was 16.0% and 16.2%, respectively, while with acidic solution, sulfite salt solution and blanching it was lower of 13.5, 12.9 and 14.8%, respectively. Using freeze drying moisture content was highest of 18.8%. The Hunter values of dried Paeonia lactiflora Pall., L, a, band ${\triangle} E$ showed that non-treatment had the most browning with 61.60, 1.89, 10.20 and 39.78, respectively, while briquet fumigation and sulfite salt solution were excellent in reducing browning. During freeze drying browning didn't occur. Paeoniflorin content was 2.41 and 2.51 %, respectively, in briquet fumigation and sulfite salt solution and was the highest (2.70%) in freeze drying. The content of $SO_2$, was 0.63% both in briquet fumigation and sulfite salts. It was 0.15% and 0.17% higher than nontreatment and freeze drying. The most effective pretreatment to inhibit browning of Paeonia lactiflora Pall. was soaking in sulfite salt solution $(0.5% NaHSO_4-0.5% Na_2S_2O_3)$ considering many things such as manpower, economical efficiency, drying time, commodity, etc. but safety should be evaluated to treat sulfite salts solution on peony roots.

• Korean Journal of Medicinal Crop Science
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• v.5 no.4
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• pp.318-324
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• 1997

When Bupleurum falcatum field was irrigated three times with 20mm at intervals of 10days after sowing, establishment was inproved (64%) and root yield increased to 58kg/10a. And in early growing stage, 30mm irrigation six times at intervals of 10days increased the number of harvested plants per square meter and resulted in yield increase by 26% over yield from natural plot. 20mm irrigation in sowing time at intervals of 10days and 30mm irrigation in early growing stage at intervals of 10days kept adequate soil moisture content (soil moisture tension: $0.39{\sim}0.49bar)$ and resulted in better establishment, growth and yield of Buleurum falcatum.

• Korean Journal of Medicinal Crop Science
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• v.6 no.3
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• pp.193-197
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• 1998

This experiment was carried out to determine the proper time for flower bud removing to improve growth, yield and paeoniflorin content of root in peony(Paeonia lactiflora Pallas). The flower buds removement caused short stem length by $7{\sim}9cm$ compared with control, but number of stem and stem diameter were similar to that of control. The number of root, fresh root weight and paeoniflorin content in peony increased when their flower buds were removed at earlier stages. The root dry weight was highest of 1.647kg/10a, and increased by 27% compared with control when their flower buds were removed at early stage (bud diameter was less than 10mm). The root dry weight increased by 13% and 10%, respectively. when their flower buds were removed prior to flowering and at flowering stage. Paeoniflorin content in leaf was higher than that in stem, and was higher at early stage. Leaf and stem showed higher paeonif1orin content when their flower buds were removed.

• Korean Journal of Medicinal Crop Science
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• v.8 no.4
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• pp.297-303
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• 2000

A peony is perennial plant which comes under Paeoniaceae. The anatomical differences in root and stem of Paeonia lactiflora Pallas and Paeonia obovata Maxim. are studied. The length of the vessel members of P. lactiflora Pallas is a bit longer than that of P. obovata Maxim. in the stem and the roots, and the width of the vessel members of P. lactiflora Pallas is wider than that of P. obovata Maxim. in the stem and the root. The secondary xylem in the root of P. lactiflora Pallas is discontinuos scalariform arrangement while that of P. obovata Maxim. is continuous radical arrangement.

• Korean Journal of Medicinal Crop Science
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• v.8 no.1
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• pp.58-63
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• 2000

Changes of yield and paeoniflorin content according to chemical control and harvest time were investigated. Peonies were harvested after four years from planting. Disease and pest control method was applied normally in first year. From second year to forth year we set two blocks and controlled them differently. In one, peonies were withered early under non-control condition. In the other which was controlled by spraying chemicals four time a year, top part withering was delayed. Harvest was taken four times top part withering was delayed. Harvest was taken four times: Jul. 25, Aug. 25, Sep. 25, and Oct. 25. In non-chemical, at harvest of Jul. 25, paeoniflorin content was highest and dry root weight was 1,126kg/10a which was little less than 1,177kg/10a of Aug. 25. In chemical control, dry root yield of Oct. 25. showed an increase of 33% over that of Jul. But paeoniflorin content in root at Oct. was lower than at Jul. or Aug. For high qualities and harvest yields of peony root, chemical control is necessary to maintain top part to late in Oct.

• Korean Journal of Medicinal Crop Science
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• v.5 no.3
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• pp.206-210
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• 1997

The pathogenic fungi associated with blight of leaf and stem in peony were leaf spot (Alternaria sp.), powdery mildew (Erysiphe aquilegiae) and rust (Cronartium flaccidum). The infection of leaf spot and powdery mildew begins from late April to midMay and rust was infected in early June. Blight time of aerial part in peony started from late May and the ratio of blight on leaf and stem was more than 50% in late Aug. Yields of root by the incidence time of blight of leaf and stem were 69.1% in late June, 65.4% in late July and $87.6{\sim}92.7$% in August and September. The number of root of more than 10mm in root diameter blighted in late June and July was much lower than in August, but the paeoniflorin content in the former was much higher than the latter.

• Korean Journal of Medicinal Crop Science
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• v.3 no.2
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• pp.156-164
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• 1995

The study was carried out to elucidate the influenced of shading and mulching with polyethylen vinyl on growth and yield of Cinidium officinale Makino, and improve the cultivation method of those medicinal plants in northern area of Gyeong-buk province, Korea. Top fresh weight of Cinidium officinale Makino was increased by both 35 % and 55% shading compared to the non-shadingand decreased by 75 % shading, but that of Ligusticum chuanxing Hart. Was decreased by the shading tested The summer wilt of Cinidium officinale Makino severely occurred in non-shading but greatly reduced by 55 % or 75 %shading, while no difference was observed in Ligusticum chuanxing Hort, between the shading and the non-shading. Dry root yield Cinidium officinale Makino was increased by 17 % and 19 % in 35 % and 55 % shading levels, respectively, compared to the dry root yield(254kg/10a) in non-shading. However, it was decreased in Ligusticum chuaxing Hort. by the shading. Emergence ratio of Cinidium officinale Makino was increased by black polyethylen vinyl mulch but decreased by transparent polyethylen vinyl mulch, compard to non-mulch. Polyethylen vinyl mulch increa­sed the top fresh weight of Cinidium officinale Makino Especialy black polythylen vinyl mulch was very effective on increasing the top fresh weight. Dry root yield of Cinidium officinale Makino was increased by 32 % and 30 %, respectively, compared to the non-shading.