Figaron 撒布時期가 溫州蜜柑의 摘果와 果實의 成熟 및 品質에 미치는 影響

韓海龍,文斗吉 제주대학교 1983 논문집 Vol.15 No.-

宮川早生('Miyagawa'), 興津早生('Okitsu')및 林溫州(Hayashi)等의 온주밀감(Citrus unshiu Marc.) 品種을 供試하여 Figaron(Ethyl 5-chloro-1H-3-indazolylacetate, 20% EC) 2,000배액을 7月14日과 24日 그리고 8月 4日에 1次 撒布하고 1次撒布 各 20日後에 3,000倍液을 追加 撒布하였다. 처리후 落果 및 果實成熟期의 着色, 果汁의 糖度와 酸含量을 調査한 結果를 要約하면 다음과 같다. 1. 早生溫州의 경우 7월中旬(果徑 27㎜) 以後의 Figaron 撒布는 落果에 영향을 미치지 않았다. 그러나 林溫州에서는 7月 14日 (果徑 24㎜) 및 7月 24日(果徑 30㎜ ) 撒布區에서 좋은 摘果效果를 얻을 수 있었다. 2. Figaron 撒布는 果皮의 着色을 促進시키는 경향이 었는데 早生溫州 特히 樹勢普通인 宮川早生에서 효과가 좋아 着色을 5~7日 앞당겼다. 3. Figaron 撒布가 果實의 生長에는 영향을 미치지 않았다. 4. Figaron 撒布는 成熟期 果汁의 糖度를 0.5정도 증가시켰으나 酸含量에 미치는 영향은 인정되지 않앗다. 5. 成木을 移植하여 얼마되지 않아 樹勢가 不安한 林溫州 試驗圃에서는 아무런 處理의 效果도 인정되지 않았다. 6. 果皮의 着色 및 果汁의 糖度에 미친 撒布時期別 效果는 뚜렷한 傾向이 認政되지 않았다. Figaron(Ethyl 5-chloro-lH-3-indazolylacetate, 20%EC) spray since on and after Mid July (when fruit dia. above 27㎜) seemed to accelerate peel colouration of 'Miyagawa' and 'Okitsu' Early Satsuma Mandarin(Citrus unshiu marc.) fruit, about five days, and to increase juice Brix by 0.5. fruit thinning effect of those treatments was not recognized. In 'Hayashi' Common Satsuma Mandarin, however, ideal fruit thinning was accomplished by Figaron spray in Mid and Late July. Slight acceleration of fruit maturation was also observed in this 'Hayashi' tree. Such effect of Figaron spray was not recognized in the orchard of the unstable tree condition. The effect of spray time from Mid July to Early Aug. on peel colouration and juice Brix was not detectable. It was suggested that the effect of the earlier spray on 'Early' Satsuma Mandarin and other factors affecting Figaron effects should be further explored before recommending its practical application.

溫州 蜜柑 夏· 秋技의 發生 및 生長에 미치는 c-MH의 效果

文斗吉,韓海龍,許英珍 제주대학교 아열대농업생명과학연구소 1986 아열대농업생명과학연구지 Vol.3 No.-

各種 土壤 管理가 柑橘品質에 미치는 影響 : Influence of Artificial Mulch during Fruit Development Season 夏秋季의 土壤被覆 效果

韓允三,韓海龍,文斗吉 제주대학교 1974 논문집 Vol.6 No.-

With polyethylene film and straw, artificial mulch from early Aug. to harvest time was experimented in a Citrus orchard on volcanic soil growing nine years old Satsuma mandarin(Citrus unshiu Marcovitch) on trifoliate orange stock. No matter what material is used, mulch delayed loss of soil water. Low soil moisture level desirable for delicious fruit quality was not attained by preventing rain flow to soil with polyethylene film, except only when mulched on already dried soil. While polyethylene film mulch increased soil temperature by 3'C at 10cm depth, straw mulch lowered soil temp. in summer. Change in soil temp. showed no apparent effect on fruit maturity and quality. Dry soil condition accelerated fruit coloring a little, and increased Brix, but decreased fruit weight, and didn't increased Brix-acid ratio. It was concluded that polyethylene film mulch could hardly be practiced to improve Citrus fruit quality in Seogwipo area orchards on volcanic soil.

早生溫州의 果皮內 主要 無機成分 組成面에서 본 日燒發生率 및 防止法에 關한 硏究

文斗吉,金承化 제주대학교 아열대농업생명과학연구소 1985 아열대농업생명과학연구지 Vol.2 No.-

바나나에 있어서 裁植苗의 種類가 生育과 收量에 미치는 影饗

金龍湖,朴才昊,文斗吉 濟州大學校 亞熱帶農業硏究所 1988 亞熱帶農業硏究 Vol.5 No.-

바나나의 莖頂培養에서 얻은 培養苗(草長 70㎝)와 吸芽苗(草長 120㎝와 170㎝)를 栽植하여 1987年 11月부터 1988年 11月에 걸쳐 濟州大學校 亞熱帶農業硏究所內 하우스에서 生育과 收量을 比較한 結果를 要約하면 다음과 같다. 1. 莖葉의 生長은 培養苗에서보다 吸芽苗에서 좋았고 吸芽苗 中에서는 170㎝ 苗에서 더 좋았다. 2. 出穗 및 成熟까지의 日數는 培養苗에 비해 吸芽苗에서 많았으나 有意差는 없었다. 3. 果房當 果指數와 果掌數는 培養苗에서 많은 편이었으나 果指長과 果指重은 반대의 경향이었으며 果房重은 栽植苗 間에 差異가 없었다. 4. 收量構成形質中 果房重과 正의 相關이 認定된 것은 果指長, 果指重, 果掌重 等이었는데 培養苗에서는 果指直徑도 高度의 相關이 있었다. 5. 段階別 多重回歸分析에서 收量에 가장 크게 영향을 미치는 形質은, 培養苗와 170㎝ 吸芽苗에서는 果掌重, 果房當 果掌數 順이었고 120㎝ 吸芽苗에서는 果指重, 果房當 果掌數 順이었다. This experiment was carried out to elucidate the effect of planting materials (shoot-tip cultured plantlet and sucker) on the growth and yield in banana (Musa cavendishii Lamb. cv. Dwarf Cavendish), from Nov. 1987 to Nov. 1988 in the plastic film house at the Research Institute for Subtropical Agriculture, Cheju National University, Cheju, Korea. 1. The growth of leaf and pseudostem was better in the sucker than that in the plantlet, and better in the larger sucker(170㎝) than that in the smaller one(120㎝). 2. Sucker tended to spend more days to bunch head emergence and maturity, but no statistically singificant difference was recognized. 3. While more fingers and hands per bunch were obtained in the plantlet, longer and heavier fingers were obtained in the sucker. Bunch weight was not different among planting materials. 4. The bunch weight was positively correlated with the length and weight of finger, and the weight of hand. In plantlet, the diameter of finger also highly positively correlated with the bunch weight. 5. In multiple stepwise regression analysis, variables most closely correlated with the yield turned out to be the weight and number of hands in the plantlet and the sucker of 170㎝, and the finger weight and the number of hands in the sucker of 120㎝.

바나나에 있어서 栽植樣式에 따른 年次間 收量 變化

金龍湖,吳現道,文斗吉 濟州大學校 亞熱帶農業硏究所 1988 亞熱帶農業硏究 Vol.5 No.-

바나나 栽植樣式이 年次間 收量에 미치는 影響을 究明하기 爲하여 濟州大學校 亞熱帶農業硏究所 하우스 內에서 ‘Dwarf Cavendish ’를 長方形(2.45 ×1.25m), 三角形(1.75 ×1.75m) 및 正方形(1.75 ×1.75m)으로 栽植하여 1985年 3月부터 1987年 2月에 걸쳐 plant crop과 ratoon crop에서의 收量形質을 分析한 結果를 要約하면 다음과 같다. 1. 出穗로부터 成熟까지의 所要日數는 ratoon crop에서 긴 편이었고 栽植樣式別로는 正方形, 三角形, 長方形 順이었으나 有意差는 없었다. 2. 果梗長은 ratoon crop에서 길었으나 果軸長은 반대로 plant crop에서 길었다. 3. 果房當 果指數와 果掌當 果指數는 年次間 및 栽植樣式間에 有意差가 없었으며 果指直徑은 ratoon crop에서 增加되었다. 4. 果房重은 ratoon crop에서 무거웠다. 5. 果房重에 미치는 栽植樣式의 影響은 ratoon crop에서 크게 나타났으며 長方形과 正方形에서 收量이 많았다. In order to elucidate the effect of planting arrangements on the yearly changes in yield characters, suckers of ‘Dwarf Cavendish ’ banana(Musa cavendishii Lamb.) were planted by the oblong(2.45 ×1.25m), triangular(1.75 ×1.75m), and square(1.75 ×1.75m) arrangements in March 1985, in the green house at The Research Institute for Subtropical Agriculture, Cheju National University, Cheju, Korea. Yield characters of two generations (plant and ratoon crops) were analyzed. The results obtained are summarized as follows; 1. More days from bunch head emergence to maturity were required in ratoon crop than in plant crop. No significant differences were recognized among planting arrangements. 2. While the fruit stalk was longer in ratoon crop than in plant crop, fruit bearing axis was longer in plant crop. 3. Number of fingers per hand or per bunch was not significantly different between generations and among planting arrangements. The diameter of finger in ratoon crop was wider than that in plant crop. 4. The weight of bunch in ratoon crop was heavier than that in plant crop. 5. The effect of planting arrangements on the bunch weight was remarkable in ratoon crop, and heavier bunch was obtained by the oblong and square arrangements.

數種洗劑類의 橘응애 防除效果와 合成洗劑인 하이타이의 撒布가 柑橘樹體生理에 미치는 影響

李奎承,文斗吉 제주대학교 1978 논문집 Vol.10 No.-

Several detergents, laundry soap, Hi-ti (synthetic-solid) and Pong-pong (synthetic-liquid), were tested on their effects on the control of citrus red mite (Panonychus citri Mc Greger) in room and field conditions. And the effects of Hi-ti spray on the some physiological aspects of 'Hayashi' Satsuma Mandarin (Citrus unshiu Mar.) tree were investigated in Seogwipo, Jeju island, 1977-1978. The effects of the tested detergents on mite control were proportional to concentration and alkality, and Hi-ti and laundry soap were similarly effective on mite control, but Pong-pong was less effective. Catalase activity of leaf was increased after Hi-ti spray, but CO₂exhaustion and chlorophyll content were decreased. However, contents of reducing and total sugar in leaf began to increase 3 days after Hi-ti spray and crude starch to decrease, also reducing sugar in 30 days increase in proportion to Hi-ti concentration, while that of crude starch decrease. And those changes in gluside contents were more significant 60 days after spray. Moreover, Hi-ti spray resulted in high defoliation, and caused leaf damage of browning.

早生溫州의 果皮內 主要 無機成分 組成面에서 본 日燒發生率 및 防止法에 關한 硏究

金承化,文斗吉 濟州大學校 亞熱帶農業硏究所 1985 亞熱帶農業硏究 Vol.2 No.-

탱자대목에 接木한 宮川早生 18年生을 供試하여 果皮內 成分을 中心으로 日燒症狀의 發生要因을 追跡 調査하고, 三保早生 18年生을 供試해서 無機成分 供給을 主로한 防止法 試驗을 實施하여 얻어진 結果를 要約하면 다음과 같다. 1. 果皮 두께가 얇을수록 그리고 果皮內 水分含量이 적을수록 日燒發生率이 높았다. 2. 果皮內 N와 Zn成分은 많을수록 日燒發生率이 높았고 K₂O와 Fe成分은 적을수록 發生이 많았으나 다른 成分은 有意差가 없었다. 3. 對照區의 日燒發生率이 12%인데 比하여 종이 봉지씌우기, Monmorin撒布 및 CaHPO₄+B 撒布區가 日燒發生率이 3%以下로 防止效果가 가장 좋았으며 CaCO₃撒布와 K?O施用區도 多少防止效果가 認定되었다. 4. 處理別 果皮內 無機成分의 集積은 Monmorin 및 CaHPO₄+B 處理區에서 N 成分이 낮고 K₂O, Fe成分이 높게 나타났으나 종이 봉지區에서 K₂O 및 Fe와 더불어 N成分도 높았다. 5. 果實品質에서는 Monmorin 및 CaHPO₄+B가 糖度가 無處理에 比해 0.3∼0.4% 높았고 종이 봉지에서는 糖이 적고 酸含量이 많았으며 着色도 지연되었다. 6. 無機成分의 葉面撒布 方法으로 日燒被害를 줄이고 果實의 品質도 向上시킬 수 있다고 結論되었다. Factors affecting the occurrence of sun scald on fruit peel were analyzed, especially in relatin to the inorganic composition of fruit peel, in Citrus unshiu Marc. cv. 'Miyagawa'. And in order to find out tge profitable method of the control of sun scald, the effects of several treatments including the application of various inorganic salts, were tested with Citrus unshiu Marc. cv. 'Miho'. The occurrence of sun scald and some fruit characters were observed. Results obtained are summarized as follows; 1. The thinner the peel thickness and the lower the moisture content in the fruit peel, the more the fruits damaged by sun scald. 2. The greater amounts of N and Zn in the fruit peel were correlated with the susceptibility to the sun scald, whereas those of K₂O and Fe with the tolerence. 3. The foliar applications of Monmorin, or of (CaHPO₄+B), and paper bagging satisfactorily decreased the occurrence of the fruit sun scald. The foliar spray of CaCO₃and the soil application of K₂O also suppressed the damage by sun scald, but those effects were not sufficient. 4. The foliar applications of Monmorin, or of (CaHPO₄+B) resulted in the hihger contents of K₂O and Fe, while the lower contents of N in the fruit peel. Paper bagging, however, increased the contents of N as well as K₂O and Fe. 5. Higher Brix of fruit juice was resulted from the application of Monmorin, or of (CaHPO₄+B), while lower brix, higher acid content of juice an delayed colour development were from paper bagging. 6. The foliar application of the proper inorganic salts was considered to be an efficien practice for the control of sun scald without any hazardous side effects on the fruit quality.

柑橘 葉面積의 推定法

文斗吉 濟州大學校 1982 논문집 Vol.14 No.-

非破壞的인 方法으로 葉面積을 推定하기 위하여, 興津早生을 供試하여 葉表面積(A)과 葉長(L) 및 葉幅(W)과의 關係에 대한 여러가지 數學的 模型을 檢討하였다. 葉面積과 葉長 또는 葉幅의 對數 사이에 直線的인 關係가 있었지만 이들 對數의 重回歸 關係를 利用하는 것이 더욱 變異가 적었다. 그러나 實用的인面에서는 A=a+b(L×W) 또는 A=b(L×W)의 關係式(여기서 a, b는 常數)을 利用하는 것이 좋을 것으로 判斷되었다. 다른 다섯개의 溫州密柑 品種과 溫州密柑 以外의 8種 도는 品種에 대해서 上記式의 a. b 常數를 決定하였다. Several mathematical relationships between leaf surface area and linear dimensions were investigated in 'Okitsu' Satauma Mandarin, in order to select an effecient method of leaf area estimation. Unexplained variation was much less in multiple regression among logarithms of leaf area, length and width than simple regression between logarithms of leaf area and length of width. For the practical application, however, it was suggested that the equation of A=a+b(LxW) or A=b(LxW) where A, L, and W are area, length and width of leaves, and a and b are constants, would be satisfactory. The constants a and b were tabulated, for 13 other cv. of species of Citrus.

開花前 低溫處理에 의한 복숭아, 배 및 사과 花器의 低溫障害

高光出,文斗吉 서울大學校 農科大學 1979 서울대농학연구지 Vol.4 No.2

Excised twigs with developing flower bud of peach (Daekubo), pear (Jangsiplang), and apple (Jonathan and Ralls) were treated by the different degrees and durations of low temperature on the different developing stages. Though discolouration of pistil or stamen was conspicuous low-temperature injury, many abnormal flowers with healthy pistil but under-developed short filament were observed in peach treated on the first bloom stage. Injury was caused, in most cases, by -3℃, and the degree of injury was increased by the increased duration of treatment and the progressiveness of bud development. Even when the injury was not immediately apparent, low temperature tended to delay flower development. Peach bud of first bloom stage and pear of white bloom were more sensitive to low temperature than apple of full pink.