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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.
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.
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.
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.
金正云(J.W. Kim),金在기(J.K. Kim),金冑,禧(J.H. Kim),申吉浩(G.H. Shin),韓載錫(J.S. Han),朴章炫(J.H. Park),趙慶淑(K.S. Cho),崔炯局(H.K. Choi) 한국차학회 1998 한국차학회지 Vol.4 No.2
In 1995 statistical data, Taiwan tea area is 21,554 hectares, predominantly in the north and central parts of the island. The main tea plantions are Taipei, Taoyuan, Hsinchu, Miaoli, Nantou, Chiayi, Yunlin, Hwalien and Taitung Counties. Taiwan's climate is subtropical, with an average annual temperature, 20 to 21˚C and annual rainfall, is over than 2000mm. Texture is Volcanic soil and altitude, 300m. Taiwan major tea varieties are Chinsin Oolong by 48%` Chinsin Dapan and TTES N0. 12. Some Production and consumption data of Taiwan tea are as follows : production, 20,892 tons ; yield, 1,048㎏/ha ; exports, 3,172 tons ; consumption, 1,210g/person in 1995. Taiwan production revenues are relatively high but, expenses are too high : production worth 48,492us$/ha, Total costs 35,520US$/ha, and Net revenue 12,972US$/ha in Shyu, 1993. Tea marketing channels in Taiwan are multiple, particularly the tea factories of midium scale production with 48% of total marketing and farm's Organzation with 5%. In Taiwan, the manufacture of diverse tea products, such as instant tea, tea candy, tea powder, fruit tea, and caky tea etc and traditional tea have developed.
슈크로스 處理가 茶나무 凍·霜害 被害 輕減에 미치는 影響
金正云(J. W. Kim),申吉浩(G. H. Shin),金永信(Y. S. Kim),崔炯局(H. K. Choi) 한국차학회 1996 한국차학회지 Vol.2 No.1
Effect of sucrose and some chemicals on the reduction of frost damage was examined in tea plant. Percentage of frost damage on foliar application of sucrose decreased by 1.8% in the first crop of green leaf, therefore, yield increased by 13%. degree of frost damage was severer at the open bud than at leaf and in the treatment of low temperature than in the duration of cold treatment. Reduction of frost damage on time of folia application of sucrose was more effective at the treatment, march 20 than April 5.