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기계유유제 살포가 차응애(Tetranychus kanzawai) 발생 및 첫물차 생산에 미치는 영향
김정운(J.W. Kim),신길호(G.H. Shin),김주희(J.H. Kim),한재석(J.S. Han),최형국(H.K. Choi),곽수년(S.N. Kwack),최지현(G.H. Choi) 한국차학회 1999 한국차학회지 Vol.5 No.1
Effects of spraying of machine oil emulsim on occurrence of tea red spider mite. Tetranychus kanzawai and yield of first tea were evaluated. The results were summarized as follows : 1. Occurrence of tea red spider mite moved from basal part of harvest surface of east in February. to middle and top part of harvest surface. 2. The population density of tea red spider mite was high on expanded upper second leaves(38%) and upper first leaves(29.2%). Horever, the density of tea red spider mite on unexpanded leaves and basal leaves was low. 3. Control value of machine oil emulsion applied on 15 March was 45%, but was 36.3% at routine application of 15 February. Two applications on 15 February and 15 march was betler than one application against tea red spider mite. 4. Control value of machine oil emulsion diluted to 20 to 40 times was 42.5~50%, but was getting lower at dilution of 60 to 80 times. The yield of fresh leaves of application at dilntion of 20 to 40 times was increased 6~7% than that of 80 times. 290kg/10a. 5. Phytotoxicity was detected with slitht wilting when machine oil tmulsin was applied at dilu tion of 20 times. However, there was on phttotoxicity in the other trials.
김주희(J.H, Kim),김정운(J.U, Kim),신길호(G.H, Shin),최형국(H.K, Choi),김선우(S.W, Kim) 한국차학회 1997 한국차학회지 Vol.3 No.2
For cutting in vitro, culture conditions of tea plants, monthly contamination rate, selection of disinfectants and infectant exposure time, were investigated. Monthly contamination rates were 12% in May, 15% in Feburuary, 32% in November and 37% in September in vitro conditions. Therefore, it was considered that optimum cutting time was from March to April. The disinfectant of 95% ethanol and 7--8% CaOCl treated was heavily contaminated by 8~9% than 95% ethanol and 25% NaOCl treated by 3% but in the latter case, survival rate was reduced and the disinfective degree was reduced in low concentration. Contamination rates on disinfectant exposure time were 10~16% in the 95% ethanol and CaOCl treated for 15~20min and decreased by 9~11% in the 95% ethanol and 25% NaOCl for 15~20min. but necrosis rate of the latter was 18~79% and survival rate was reduced. The optimum disinfection conditions in vitro culture tea plants are as follows ; after dip plant in the 95% ethanol for 3~5 seconds, disinfect by 7~8% CaOCl treated for 15~20min. and rinse in sterilized water, 3~5 time repeatly.
韓國 自生茶(Camellia sinensis L.) 花粉 貯藏 特性
김정운(J.W. Kim),곽수년(S.N. Kwack),최형국(H.K. Choi),신길호(G.H. Shin),김주희(J.H. Kim),한재석(J.S. Han) 한국차학회 1999 한국차학회지 Vol.5 No.2
For breeding new Korean tea cultivars, it is very important to get basic informations on pollen storage method. Results of this investigation are summarized as follows. The pollen germination rate during storage was changed a little differently among varieties, and pollens collected from flowers in bloom-the pollens collected in two days before bloom showed higher germination rate than them in one day after bloom or five days before bloom. During Storafe at 20˚C, the pollens germination rate was decreased in 3 to 5 days after storage, and pollens was not germinated in 25 days after storage. Optimum temperature for pollen storage was 0 to -5˚C. Pollens in one day after bloom showed low germination rate compared to them in bloom or in 1-5 days before bloom. In conclusion. to extend storage time of tea pollens, it should collect and store in bloom or one day before bloom.
박장현(J.H. Park),김정운(J.W. Kim),김정근(J.K. Kim),한재석(J.S. Han),신기호(G.H. Shin),최정(J. Choi),최형국(H.K. Choi) 한국차학회 1999 한국차학회지 Vol.5 No.2
Chemical constituents in the different parts of tea shoots were investigated for green tea. "Okro". The contents of total nitrogen, caffeine and vitamin C at the leaves were decreased with growing, while those of total amino acid and chlorophyll were the highest at the 5th leaves and in the 3rd leaves, respectively. The content of tannin ranged from 8.63% to 12.29%. The content of tannin at the 1st leaves was the highest as 12.29% and that of the 4th leaves was the lowest as 8.63%. The contents of free amino acids at the stem was the highest as 4,675 mg/100g and most of amino acids except for theanine were greater at the lower part and mast of amino acids contents were higher at the stem than at the leaves. The content of fatty acids at the 2nd leaves was the highest as 3.594 mg/100g and that at stem was the lowest as 1.376 mg/100g. The contents of palmitic acid and stearic acid were the highest in the 5th leaves and those of oleic acid, linoleic acid and linolenic acid were the highest at the 2nd leaves. In conclusion, the 5th leaves among tea shoots plucked before the 2nd shading for 15 days could be used to manufacture Okro.
茶葉 收穫後 製茶前 經過時間 및 溫度가 製品의 品質에 미치는 影響
김주희(J.H.Kim),박장현(J.H.Park),김정운(J.W.Kim),신길호(G.H.Sin),최형국(H.K.Choi),김선우(S.W.Kim) 한국차학회 1997 한국차학회지 Vol.3 No.1
The effects of storage time and temperature of fresh leaves were investigated on the quality of made tea. The contents of total nitrogen tannin, chlorophylls, total amino acid and caffeine were decreased with increasing storage time and stroage temperature. Shape of green tea was better at high temperature in storage and long stroage time. Color of green tea extracts was better in short storage time from plucking to precessing of fresh tea leaves. When fresh tea leaves were stored for 9hr at 5˚C and for 3hr at 25˚C(room temperature), color of green tea extract, flavor and aroma were good. Optimum storage conditions of fresh tea leaves before processing were storage for 9hr at 5˚C or for 3hr at 25˚C.
차나무 경정배양시 생장조정제의 종류 및 농도가 품종간 신초 생장과 발근에 미치는 영향
김주희(J.H. Kim),최형국(H.K. Choi),김정운(J.W. Kim),신길호(G.H. Sin),한재석(J.S. Han),김선우(S.W. Kim),오미정(M.J. Oh) 한국차학회 1998 한국차학회지 Vol.4 No.1
Effects of growth regulators and their concentration on shoot growth and rooting of Tea stem cultures are as follow. Application of BA1.0~5.Omg/ℓ promoted shoot growth, leaf number, and callus induce in tea. It was not difference of shoot growth among cultivars, but C.V. Yabukita grew well in the application of BA. callus induced in all applitions, and treatment of BA1.0 -3.Omg/ℓ excellent. Number of root incressed in the applications of NAA, but not rooted in BA, thus root development achived by the treatment of IBA 1.0~3.Omg/ℓ . It was good for growing shoot growth in mixtured growth regulators, BA and GA₃then only a growth regulator.
한국자생차(Camellia sinensis L.)의 주요 특성조사
김정운(J.W. Kim),곽수년(S.N. Kwack),최형국(H.K Choi),신길호(K.H. Shin),한재석(J.S. Han) 한국차학회 2001 한국차학회지 Vol.7 No.1
For breeding new Korea tea cultivar. it in very important to get basic informations on major characters of Korean native tea varieties. In these experiments, the characters of leaf and flower, stomota of tea leaves were investigated in 25 native tea varieties. Results of this investigation are summarized as follows Eight native varieties including ‘Songgwangsa Temple’ had 7-9cm in leaf length and four varieties including ‘Jangheung Bangcuon’ hand more than 11.0cm. The number of crenate in the half leaf of native tea plant were 25-30 in 16 locations and the number of stomata per mm' were 111-130 in 13 loactions. According to pistil characteristics, ‘Bulgabsa Temple’ and ‘Bubcheonsa Temple’ varieties showed the same Ld type as ‘TITES No12’ which the pistil is longer than the stamen and the location of splitting point is under two thirds of pistil.