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新品種 밀 "早光"의 沓裏作 播種期 및 播種量에 관한 硏究
黃鍾奎,崔京求,陳星桂 全北大學校 1979 論文集 Vol.21 No.-
This experiment was carried out under different seeding dates(October 10, Oct. 20 or November 10) and seeding rates (20, 30, 35 ℓ 10a) from 1976 to 1977 in Iri in order to study the suitable seeding date and seeding rate for Jokwang, the newly developed wheat variety, in double cropping paddy field. 1. Number of days to seedling emergence both on Oct. 20 and Oct. 30 were 14 days, but that of Nov. 10 was prolonged due to comparatively low temperature and about 37 days. 2. The heading date and the maturing date seemed to be shortened by 1 or 2 days in accordance with the earlier seeding date and the larger amount of seeding. 3. Number of panicles per square meter seeded on Oct. 20 was 506 which marked the most among the three seeding dates. 30ℓ 10a plot showed the most in panicle number among three seeding rates. 4. Number of grains per panicles was increased by 1 or 2 grains with hastened seeding date, but it was decreased by 2 or 3 grains with the increase in seeding rate. 5. The weight of 1,000 grains of the plots both seeded on Oct. 20 and Oct. 30 was about 38.0 g. and that of Nov. 10 was 35.0g. On the other hand, there were almost negligible differences in 1,000 grains weight between seeding rates at the same seeding date. 6. The yield of the plot seeded on Oct. 20 was 359 ㎏ 10a which marked the highest among the three seeding dates. Among seeding rates, 30 ℓ/10a plot showed the highest yield of 351 ㎏ 10a. However, the highest yield among all treatments, seeding dates and seeding rates, was 382 ㎏ 10a which was obtained from the plot seeded on Oct. 20 with the seeding rate of 30 ℓ/10a. 7. Therefore, it was considered that the suitable seeding date for Jokwang, the newly developed wheat variety, in double cropping paddy field in Iri area was Oct. 20 and its seeding rate was 30ℓ/10a.
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黃鍾圭,崔京求,金鎭基,李成春 전북대학교 농업과학기술연구소 1981 農大論文集 Vol.12 No.-
The present study was aimed to search for any possibilities of shortening breeding periods of ginseng plants by checking the effects of endocarp and plant growth substances on after-ripening and germination of ginseng seeds, and by examining the effects of gibberellic acid (GA) on breaking dormancy of buds. The following results were gained. 1. Removing endocarp from seed was considerably effective in accelerating embryonic growth, resulting in shortening the after-ripening period by 80~100 days compared to that of the intact seeds. 2. GA was also effective on embryonic growth of ginseng seeds and its effect was accelerated by either removing endocarp from seeds or a high concentration of GA solution. 3. Seeds without endocarp showed susceptibility to diseases especially when treated in a high concentration of GA solution. 4. Benzyladenine (BA) was effective on germination of physiologically immature ginseng seeds particularly when a high concentration of BA solution was used. But GA treating for germination was ineffective. 5. Seedlings grown in a green house for 6 months showed sligtly lower growth when compared to those using traditional methods. 6. GA had effects on breaking bud dormancy of 1,2 and 3 year-old ginseng plants, particularly when used in high concentration. Its effect increased with delayed treating dates or younger plant ages. 7. Root rot also increased with the concentration of solutions of GA and the plant ages. Summarizing the above, the period of raisins ginseng seedlings was possibly shortened by ac-celerating the after-ripening period with GA treatments, with removing endocarp from seeds, and by breaking physiological seed dormancy with BA treatments. Besides, it is also possible to grow ginseng plants twice in a season by breaking bud dormancy with GA treatment. However, it should be recognized that the need to protect treated ginseng seeds or plants is necessary in order to gain desired results.
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崔京求,金鎭淇,黃種奎 全北大學校 1978 論文集 Vol.20 No.-
This study was carried out to investigate the effect of some growth regulators i.e., gibberellic acid (GA), benzyladenine (BA) and abscisic acid (ABA) on the dormancy breaking of new buds in 2 year-old Ginseng plants. Materials were sampled in the middle of October and their dormancy was checked under the favorable conditions for germination of bud for a month. They were treated for 24 hours with the following growth regulators; (1) GA, BA and ABA at the concentrations of 50 and 100 ppm, and (2) the combination of GA and BA, GA and ABA, and BA and ABA at the concentrations of 50 ppm, respectively. It was found that the application of GA was effective in dormancy breaking of new buds and seemed to elongate stem, flower stalk and petiole but degenerated the majority of flower stalk in the early stage and also accelerated the formation of the adventitious root. By the application of GA, poor development of color was observed in leaf and stem in the early stage. The leaf began to regain green color with leaf maturation but the stem did not gain purple color. The applications of BA and ABA combined with GA showed almost the same effect in dormacy breaking as GA application. In these cases color development of stem and leaf was good cmpared with that of GA application. Even with some side-effects such as elongation and poor color development of stem and leaf, GA might be applied for dormancy breaking of new buds substituting for the low temperature in winter.
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