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元世鎬,金翰琳 동국대학교 농림과학연구소 1969 農林科學 論文集 Vol.3 No.-
This experiment was made to study the effects of covering treatments-rice-straw (A), straw-mat (B), fishing-net (C), vinyl-film (D), OED spraying (E) and control (F)-on the defoliation of Citrus nushiu MARC. var paraecox TANAKA on Cheju-do through the winter. The results obtained were summarized as follows: 1. The comparison of all treatments v. s. control except OED spraying showed that there was high significance among each of them (B=C<A<E<F<D) but vinyl-film covering showed more defoliation than the control. 2. Straw-mat and fishing-net were most effective in protecting defoliation and there was no significant difference between them. 3. up to the present, the fishing-net for winter has never been applied to citrus culture on Cheju-do, but according to this experiment it was effective in preventing defoliation, handy in covering and removing and more economical than straw-mat.
果樹苗木의 栽植時期, 覆土가 活着 및 生育에 미치는 影響
元世鎬 동국대학교 농림과학연구소 1967 農林科學 論文集 Vol.1 No.-
Fruit trees are planted during the dormant period in order to reduce injury from the damage of roots when the fruit nursery stocks are dug. In our country, the air temperature goes low very in the winter ; and fruit trees are planted either in the fall or spring so as to void freezing injury. It is generally said, the fruit trees planted in the fall grow better than the trees planted in the spring. But this is the case for the region where the werther is comparatively moist and not so cold inthe winter and spring planting is recommended for the region where the weather is dry and cold in the winter; however, no definit suggestion was made any season would be better for a certain reion. In this connection, this study has been made to examine planting time by kind of fruit trees in Seoul region. The sarvival of planted trees are so important in planting fruit trees that it also was examined in this study. The results are summarized as follows: 1, In planting apple, Japanese pear, peach, plum and grape; the trees were planted in the fall showed generally better growth than the trees planted in the spring. In the case planted in the fall or spsing the trees, the trees planted in early season generally showed better growth. 2, The trees hilled after trees planted generally showed better growth than those of not hilled. 3, In planting apples, Japanese pears, peaches and plums; no difference was observed on the survival of trees between the trees planted in the fall and the trees planted in the spring; but in planting grapes, suruival of the grape trees not hilled was markedly poor than those of hilled in case of planting late season in the fall planting. 4, No difference was observed on both the budding and openeing leaves in all plots.
切接時 接着部의 비닐被覆이 活着 및 生育에 미치는 影響
元世鎬 東國大學校 1965 論文集 Vol.2 No.-
In order to promote the formation of healing tissues by preventing dryness of sion and contact portion of sion in veneer-grafting, the grafted plant has usually been mounted with soil only as high as the upper portion of sion or else painted by grafting wax. But, if contact portion of sion is wrapped and tied with vinyl, the grafting operation would be simpler and the cost would be less; and the following are the data of my research work regarding the above statement. 1. In the sections where the grafted portion was painted with grafting wax or wrapped and tied by vinyl, the sion and its contact portion were prevented from becoming dry; the rate of union of the sion was far better. Therefor it is found that wrapping of grafted portion by vinyl bring higher efficiency in veneer-grafting operation. It is the best method form the economical aspect. 2. No differences were recognized on the growth of grafted plants in all sections through germination, green tip and subsequent stages.
복숭아의 生理的 落果에 관한 硏究 : 복숭아의 生理的落果와 總糖, 窒素 및 水分과의 相關
元世鎬 東國大學校 1967 論文集 Vol.3-4 No.-
The physiological drop occurs heavily on peach trees. The lack of fertilization and the discontinuation of development of embryo are the causes of the physiological drop; and the total sugar, nitrogen and water in the fruits are the factors closely related to the discontinuation of development of embryo. It is said the deficiency of total sugar, nitrogen and water in the fruits cause the physiological drop, and the deficiency of nitrogen or water supply in the soil cause the physiological drop and also the excessive supply of nitrogen or water in the soil cause the physiological drop. It is easy to understand that the physiological drop occurs when the total sugar, nitrogen and water are short in the fruits, and also when the nitrogen or water supply were deficient in the soil, but it is a little hard to understand why the physiological drop eccurs when nitrogen or water is excessively supplied in the soil. Therefore this experiment was made to check the relationship between the physiological drop and the total sugar, nitrogen and water in the fruits, and nitrogen or water in the soil. The results obtained in this experiment are summarized as follows: 1. The dropped fruits contained less total sugar than the fruits not dropped. This means the deficiency of total sugar supply on the fuits is the cause of physiological drop. 2. The deficiency of nitrogen or water supply in the soil reduced absorptioin of them in the plant body; the nitrogen or water content ini the leaves were reduced and it caused the physiological drop; and the dropped fruits contained less nitrogen or water than the fruits not dropped. This means the short supply of nitrogen or water to a fruit causes physiological drop. 3. Excessive nitrogen or water supply in the soil results in the significant absorption of nitrogen or water in the plant body, and the leaves also contained more nitrogen or water, however, physiological drop occured in this case also. The dropped fruits contained less nitrogen or water than the fruits not dropped. In this case vegetative growth of the shoots and leaves were very vigorous. Also, when the excessive supply of nitrogen or water was given to the soil, the physiological drop takes place. This phenomenon, considered in the light of the above, because too much nitrogen or water was exhausted in the vegetative growth of shoots and leaves. As a result, it is supposed that has been caused by the short supply of nitrogen or water into the fruits.