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播種時期에 따른 油菜(Brassica napus L.)의 生育 및 收量形質에 미치는 影響
吳現道 제주대학교 1975 논문집 Vol.7 No.-
Experiments have been conducted to find out the effect of seeding date on vegetative and yielding characteristics with 20 varieties of rape. The varieties tested were planted 6 times with 30-day interval from October 30, 1973 to March 30, 1974. The experiments were carried out at Seoguipo, Jeju-do and the results obtained are summarized as follows : 1. The plant height was greater at the earlier seeding as compared to the later seeding. Shorter plant height was observed in the winter-type varieties especially when they were planted in spring, while the earlier maturing varieties showed higher plant height than later maturing ones. 2. The rate of increase in the plant height was investigated during the period from October 30 to December 29, 1973. The rate of increase appeared to be the highest in the varieties of plant-type Ⅵ with late maturity and it was followed by plant-type Ⅲ, Ⅱ and Ⅰ. 3. Significant variation in flowering date was noticed by seeding dates and varieties. The days from seeding to heading was shortened by early planting and rosetting was appeared when the rape was planted too late. Within the same planting date the flowering dated of the varieties with longer plant height was later than that of the ones with shorter plant height. 4. The number of pods or branches per plant was greater in earlier planting and they were decreased by the delay of planting. Negative linear correlation was obtained between the planting date and the number of pods or branches per plant. 5. The significant decrease in the 1000-grains weight was recognized in later plantings than December 29, though little variation was observed in earlier plantings. 6. The seed yield tended to be decreased by the delay of planting. As compared to the mean yield of 168kg/10a at the first seeding, on 50%, 31% and 6% of the yield was obtained at the second, third and fourth planting, respectively. 7. The variation in the oil content of seed showed almost the same tendency as that in the 1000-grains weight. The oil content of seed was markedly decreased when the rape was planted later December 29. 8. It appeared that the planting date was negatively correlated with the seed yield. However, the other characters such as plant height, days from seeding to flowering, number of pods or branches per plant, and 1000-grains weight was positively correlated with the seed yield, respectively. Namely, the seed yield was increased by higher plant height, longer duration to flowering, more number of pods or branches per plant, and heavier 1000-grains weight.
Stevia에 있어서 優良系統 選拔을 爲한 主要特性 分離에 관한 硏究
吳現道 제주대학교 1980 논문집 Vol.12 No.-
This study was conducted to discover some main characteristics for the selection of a superior line in Stevia rebaudiana Bertoni. The results obtained are summarized as follows: The medium-sized leaf appears far more frequently than the large and small-sized leaf, and the Latter two appear in some what similar ratio to each other. Shape of the leaf is most frequently elliptic, and orbicular and linear shapes are rather infrequent. Stems of medium length appear most frequently, and shorter stem infrequently. The length of internode occurs in a positive correlation with the length of stem. The branch develops more commonly at an acute angle. The plant with a minimum of branches appears with maximal frequency. Those plants which have major and medium number of branches appear in similar ratio to each other. The maojrity of plants begin to flower in early September.
Stevia(Stevia rebaudiuna Bertoni)에 있어서 主要系統의 特性과 Steviaside變化에 관한 硏究
吳現道 濟州大學校 1982 논문집 Vol.14 No.-
本 硏究는 Stevia의 主要系統의 特性과 成分含量의 變化를 究明하기 爲하여 1981年度 濟州道에서 遂行하였다. 草長은 水原11號 가장 높았으며 다음이 水原12號, 13號 및 水原 14號는 비슷하였으며 水原 2號, 農家栽培種 順位였다. 節數는 水原2號가 가장 많았으며 水原11號, 12號 및 14號는 비슷 하였고 農家栽培種이 越等이 적었다. 乾葉收量은 水原2號, 4號가 가장 많았고 다음이 12號, 11號, 13號의 順位를 나타내었고 農家栽栽培種은 顯著하게 떨어졌다. stevioside와 rebaudiside 含量은 水原 11號가 가장 많았고 水原 12號 및 14號가 같은 含量으로 다음이었고 水原 2號와 13號는 農家栽培種보다 떨어졌다. 10a當 stevioside및 rebaudiside 含量은 乾葉收量과 成分含量을 綜合的으로 評價할 때 水原14號가 가장 優秀하였고 다음이 水原12號, 11號, 2號, 農家栽培種 順位였다. This study was conducted to obtain agronomic characteristics and components of Stevia rebaudiana Bertoni. Results may be summarized as follows: Stalk was longest in Suweon 11 with similar lengths amongst Suweon 12, 13 and 14. Stalk lengths were considerably less with Suweon 2 and local cultivar. The largest number of node was found in Suweon 2, slightly less amongst Suweon 11, 12, 13 and 14, and the least in the local cultivar. The yield of leaves was highest in Suweon 2 followed in descending order by Suweon 14, 12, 11 and 13 with the lowest yield in local cultivar. The content of stevioside and rebaudiside in dry leaves was highest in Suweon 11, followed by similar content in Suweon 12 and 14, and descended in order of local cultivar, Suweon 2 and 13.
유지류의 생육지 기후와 종자중의 지방산, 옥소가와의 관계
오현도 濟州大學校 亞熱帶農業硏究所 1999 亞熱帶農業硏究 Vol.16 No.-
Abstract This study determined the relationship between climate and the fatty acid composition of seeds and the property of oils and fats in 35 oilseed crops grown in tropical, subtropical and temperate zones by analyzing data from published reports. Climate generally affected fatty acid composition of seeds and the property of oils and fats in these crops. Lauric, palmitic, and oleic acids were predominant fatty acids of the tropical oil seed crops and thus the tropical oil seed crops had higher saturated fatty acid content. Unsaturated fatty acid such as linoleic and linolenic acids were main fatty acids of the most temperate oilseed crops and thus the temperate oil seed crops had lower saturated fatty acid content. Because of fatty acid composition, seeds of most tropical oil seed crops were normally low in iodine value and had fat and non-drying/semi-drying oils while those of most temperate oilseed crops had drying oils. There were many woody oilseed crops in tropical zones and many herbaceous oilseed crops in temperate zones. Most woody oilseed crops had lower iodine value compared with herbaceous species.