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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.
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.
Phytochrome이 보리잎 Protoplast의 팽윤에 미치는 영향
홍경애,송성준,송필순,유장걸,문두길 제주대학교 방사능이용연구소 1986 연구보고 Vol.2 No.-
암조건에서 생육시킨 보리(Hordeum valgare)잎의 생장점 부근에서 분리한 Protoplast가 적색광 처리에 의해서 팽윤되었고 적외선광에 의해서는 적색광 효과과 소멸되었다. 이 사실은 Protoplast의 팽윤이 Phytochrome에 의해서 조절됨을 시사하는 것이나 Phytochrome의 작용기작을 알기 위해서는 다각적인 연구가 필요하다. 실험결과로 부터 적색광 처리시간은 2분 적색광 처리후 배양시간은 2시간이 적당함을 알았다. Protoplast 배양액의 Sorbitol 농도에 따른 크기변화는 농도가 낮을수록 커졌으며 0.4M 이하에서는 Protoplast가 파괴되었다. Light effect on the size of protoplasts isolated from etiolated barley leaves was studied. Red light irradiation caused a swelling of protoplasts while little change in size found under the dark condition. Photoreversibility by red light and far-red light was found in protoplast swelling, indicating the involvement of phytochrome. Action mechanism of phytochrome on protoplast swelling should be clarified in aspect of growth regulators and intermediates involved. Two minute irradiation time and two hour incubation after red light treatment were found sufficient to induce protoplast swelling. The protoplasts were swollen according to the sorbitol concentration of incubation media but destroyed below 0.4M-sorbitol concentration.