• 한국초지조사료학회지
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• 제15권1호
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• pp.37-42
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• 1995

This experiment was canied out to study the effects of seeding and harvesting dates on the growth of early and late maturing rye(Seca1e cereale L.) varieties at the forage testing field of S.N.U., Suweon, from September 1986 to May 1989. Leaf and tiller numbers of rye per plant were increased with earlier seeding date, but no difference in the tiller numbers was found between harvesting dates of early and late maturing rye varieties. Tiller dry weight of an early maturing rye veriety, Wintermore was higher than that of a late maturing rye variety, Kodiak when sown as early as September. Maximun leaf area index(LA1) and leaf area index duration(LA1D) were achieved with earlier seeding and early maturing rye varieties. A higher correlation between the maximum LA1 or LAID and dry matter accumulation of rye varieties was observed in this experiment.

• 한국초지조사료학회지
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• 제15권2호
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• pp.124-131
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• 1995

In order to find out optimum seed production date according to different defoliation and flooding period of Italian ryegrass, this studies with Tetrone were canied out on the experimental field of Honam Crop Experiment Station from 1986 to 1988. Treatments included cutting date of Nov. 20 and Apr. 10 and flooding period of 5-25 days. In soil after experiment, organic matter, phosphate and silicate content increased, but potassium content decreased 0.16% than that before experiment. Heading and maturing date of Nov. 20 cutting were same with those of non cutting, those of Apr. 10 cutting lates 6 days to heading date and 2 days to maturing date. Plant height and culm length of Nov. 20 cutting were sirniller to those of non cutting, those of Apr. 10 cutting were shorter and panicle length have no difference between non cutting and cutting. Lodging of cutting treatment was reduced than that of non cutting. Lodgin was increased as flooding period was long, also loding of all treatment occured at 30 days after heading. Two cutting times of Nov. 20 and Apr. 10 have the most fresh yield, while non cutting have the most dry matter yield. Optimun seed productin date was considered to suitable when 35 days after heading (Jun. 14), at this time, seed production was 1,640 to 2,640 kg/ha. Also if flooding j u r y have, seed production was good between 10 days and 15 days after flooding.

• 한국작물학회지
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• 제57권3호
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• pp.310-315
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• 2012

들깻잎 생산 전용품종은 대부분 만생종으로서 우량종자를 채종하고자 할 경우 도복 등이 발생하지 않아 생육관리가 용이하면서 종실 충실도가 높은 파종적기를 설정할 필요가 있다. 이에 중부지역 비닐하우스에서 잎들깨 생산 전용 품종 '잎들깨 1호'를 시험재료로 하여 5월 6일부터 7월 15일 까지 10일 간격으로 8회 파종하여 생육, 도복 발생 여부, 적산온도 및 수량성을 분석하였다. 1. 파종시기가 늦을수록 경장이 짧아지고, 주경절수, 분지수, 화방군수와 화방당 삭수는 감소되었다. 그러나 파종시기가 빠를수록 지상부 생육이 왕성하여 도복이 발생하였다. 2. 개화일수는 파종시기가 늦어질수록 직선적으로 감소되었는데 5월 6일을 기준으로 파종이 1일 지연되면 개화일수는 0.86일씩 단축되었고, 개화기부터 성숙기까지의 결실일수는 29~31일로 파종기 이동에 따른 차이가 없었다. 3. 등숙립율과 종실수량은 5월 6일 파종부터 6월 15일 파종까지 유의성이 없었고, 6월 25일 파종 이후부터 급격히 감소되었다. 4. 등숙에 필요한 적산온도, 도복 발생 여부, 등숙립율과 발아율 등으로 판단하면 만생종 잎들깨 품종의 중부지역 비닐하우스에서 파종적기는 6월 5일(정식 7월 5일)~6월 15일(정식 7월 15일)이었고, 이때 10월 28일~11월 3일경에 성숙되어 종자생산이 가능하였다. 5. 연차에 따라 $0^{\circ}C$ 이하로 떨어지는 시기가 일찍 오는 경우 한해에 의하여 노지재배는 고사될 우려가 있고, 중부지역에서는 비닐하우스를 이용한 잎들깨 채종재배가 가능하였다.

• 한국식품저장유통학회지
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• 제4권1호
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• pp.77-85
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• 1997

This study aims to determine the optimal picking time and the favorate variety for Ume processing. The changes of physicochemical components and flavors of 6 varieties of the Ume were investigated during maturing. Average weight of the fruit increased to the range of 151-292% from 70 days to 90 days after blooming. The hardness of fruit decreased during maturing and Koume variety was not suitable for processing among the last harvesting samples. Moisture and ash were reached to 89-91%, 0.57-0.69%, respectively, and the ash content increased during maturing. Among the Ume varieties, relatively high content of total acid was observed in Oshuku and Koume. The major organic acid were malic, citric, succinic, and tartaric acid. The content of malic acid decreased significantly, whereas citric acid increased during maturing. Thirty five kinds of flavor components were identified from the Ume fruit and main components were ethyl acetate, butyl acetate, and organic acid derivatives. Koume contained a large amount of flavor components among the Ume and the content increased during maturing.

• 한국작물학회지
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• 제68권2호
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• pp.35-46
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• 2023

The transplanting period limit considering the rice yield in the Dague region, the inland plains of Gyeongsangbuk-do, was estimated to be July 15^th for early and mid-maturing rice and July 5^th for mid-late maturing rice. However, as the transplanting time was delayed, the characteristics of rice starch changed significantly. In the case of early and mid-maturing rice varieties, the starch granule size increased as the transplanting time was delayed; the opposite tendency was observed for mid-late maturing varieties. In all mature rice types, the late transplanting resulted in a longer pasting time and a higher pasting temperature. In addition, the peak viscosity, breakdown, and gelatinization temperature were significantly lowered, the relative crystallinity degree decreased, and the setback was significantly increased. In the case of Ilpum, a mid-late maturing rice variety, the distribution of amylopectin short chains tended to increase when rice was transplanted on June 30^th.

• 농업과학연구
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• 제45권3호
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• pp.355-363
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• 2018

This study was conducted to investigate suitable rice cultivars for various rice based cropping systems in a paddy field in the Yeongnam plain area. Thirteen rice cultivars (5 early, 3 medium and 5 mid-late maturing cultivars) and three transplanting dates (June 5, June 25 and July 5) were evaluated in this study. The mid-late and early maturing cultivars for the July 5 and June 25 transplanting headed before August 30 which is the safe heading date in the Yeongnam plain area, ranging from Aug. 26 - 28 and Aug. 18 - 23, respectively. The safe harvest time of rice for double and triple cropping systems should be before the middle of October for the cultivation of the succeeding winter crops. The rice yield was the highest for the June 5 transplanting regardless of the rice cultivars, and it gradually decreased as the transplanting date was delayed from June 5 to July 5 due to a decrease in the spikelet numbers per panicle number and in the ripened grain rate. In contrast, the other yield parameters that include the panicle number per $m^2$, the 1,000-brown rice weight, and the ripened grain ratio were not significantly affected. The result indicates that based on the milled rice, heading time and harvest time, a medium maturing cultivar (Haiami and Samdeog) would be applicable to a winter barley/wheat, garlic/onion-summer rice double cropping, while a mid-late cultivar (Saeilmi, Saenuri and Hyunpoom) would be suitable for a spring potato/waxy corn-summer rice double cropping in the Yeongnam plain area. On the other hand, an early maturing cultivar (Unkwang, Jokwang and Haedamssal) would be preferable for a triple cropping because of the short growth period of rice.

• 한국작물학회지
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• 제47권6호
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• pp.395-401
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• 2002

보리의 조숙 품종을 육성하기 위해서는 조기 출수인자에 단기 등숙성 인자를 도입하는 것이 중요하므로 출수기, 성숙기 및 등숙기간의 유전에 관한 정보를 얻고자 4개 품종(사천6호, 오월보리, 동보리1호, Reno), F$_1$, F$_2$세대의 종자를 포장에 파종, 재배하여 출수기, 성숙기 및 등숙기간을 조사하였다. 1. 출수기는 4월 3일-4월 26일, 성숙기는 5월 15일-5월 27일, 등숙기간은 31일-42일로 교배친 및 F$_1$ 조합간 차이가 현저하였다. 2. 부분 이면교잡에 의한 분산분석 결과, 출수기에 대해서 동보리1호(출수기 늦음)는 우성으로, 오월보리는(출수기 빠름) 열성으로, 출수기 유전은 유전자의 상가적 작용이 큰 부분우성으로 나타났다. 3. 성숙기에 대해서 동보리 1호가 우성으로, 오월보리가 열성으로, 성숙기 유전은 유전자의 상가적 작용 큰 부분우성으로 나타났다. 4. 등숙기간에 대해서 Reno(등숙기간이 짧음)가 우성으로 오월보리(등숙기간이 길음)은 열성으로 유전자의 상가적 작용이 큰 부분우성으로 나타났다. 5. 출수기, 성숙기에 대한 일반조합능력의 분산량은 고도의 유의성이 인정되고, GCA분산이 SCA분산보다 출수기는 10.1-29.5배, 성숙기는 9.9-121배 높아서 유전자의 상가적 작용이 컸으며, 사천6호와 오월보리는 출수와 성숙이 빠른 방향으로, 동보리 1호와 Reno은 늦어지는 방향으로 효과를 보였다. 6. 등숙기간에 대해선 GCA 효과는 F$_1$과 F$_2$ 세대간 유의적 차이가 있었고 GCA/SCA비가 크므로 유전자의 상가적 작용이 현저하였다. 7 포장 출수기, 성숙기는 결빙방지 단백질의 농도, 광합성의 광저해에 대한 내성, 포장 내동성과 고도의 정의 상관을, 등숙기간은 각 형질들과 부의 상관을 보였다. was "glossy and smooth" in all cases and preference about the texture was high. The Doenjang with added P. japonica Powder had a saltier taste and the Doenjang with P. japonica Powder had the least sweet taste. In the flavor and overall Preference, the Doenjang with P. japonica powder was the lowestEX>로 측정되었고, 계사내 지붕의 표면 온도는 최고 $29^{\circ}C$가 측정되었다. 계사 내 표면 온도 및 닭의 표면 온도는 계사내 공기온도의 영향을 많이 받는 것으로 나타났다.ill in a good agreement with those predicted by Rohsenow's formula, which was based on nucleate boiling. For the condenser, the wall temperatures were practically uniform, and the measured values of condensation heat transfer coefficient were 1.7 times higher than the predicted values obtained from Nusselt's film condensation theory on tilted plate. Using those two expressions, a correlation was formulated as a function of heat flux and tilt angle, to determine the total thermal resistance of a tilted thermosyphon.

• 한국초지조사료학회지
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• 제24권3호
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• pp.201-206
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• 2004

본 시험은 가을에 파종한 조, 만생품종 사초용 호밀의 생육특성 및 건물수량을 알기 위하여 실시하였다. 2002년 10월 3일과 2003년 10월 8일에 조생품종인 Koolgrazer을 대조품종으로 조생품종 9909, Ol-homil 및 Jlee select와 중생품종인 Homil 22 그리고 만생품종인 Danko, Kior, Amilo 및 Spooner을 각각 파종하였으며, 2003년 4월 22일과 2004년 4월 23일에 각각 수확하였다. 내도 복성은 조중생품종이 만생품종보다 다소 낮았다. 초고는 조중생품종이 만생품종 보다 길었다. $50\%$ 출수일은 조생품종이 2년 평균 4월 14일이었던 반면에 만생품종이 4월 24일로서 조생품종이 10일이나 더 빨랐다. CP 함량은 만생품종이 조생품종보다 높았으며, ADF와 NDF 함량은 조생품종이 높았다. 건물수량은 1년차 시험에서 조생품종Jlee select가 가장 높았으며(p<0.05), 9909와 Koolgrazer는 유사하였고, 중만생품종 Homil 22, Danko, Kior, Amilo 및 Spooner는 조생품종 보다 낮았다. 2년차 시험에서는 조생품종인 9909가 가장 높았으며(p < 0.05), Koolgrazer와 Ol-homil은 비슷하였고 Jlee select는 낮았고, 만생품종 Danko, Kior, Amilo 및 Spooner는 조생품종 보다 낮았다. 본 연구의 결과로 보아 2모작 작부체계에서 추파용 호밀은 조생품종이 적합하다고 생각된다.

• 한국초지조사료학회지
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• 제16권4호
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• pp.299-306
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• 1996

This experiment was conducted from 1991 to 1993 at the forage experimental field, College of Agriculture and Life Sciences, SNU, Suweon to investigate the effects of previous crop residues on growth and yield of succeeding corn(2ea mays L.) and also to determine the best double cropping system necessary to maximize the total dry matter yield of winter forage crops plus corn for silage. In this experiment, treatments consisted of no crop as a control, late maturing Kodiak rye(Seca1e cereale L.), Bamapoli forage rape(Brassica napus Subsp. oleifera L.), G-sprinter oats(Avem sativa L.), Chief crimson clover(Trifolium incarnatum L.), Jackson Italian ryegrass(lo1ium rnultiJlorum L.), Vantage vetch(Vicia sativa L.) and early maturing Koolgrazer rye(Seca1e cereale L.). Corn leaf number and silking date were not significantly affected by previous crop residues, but the leaf number of corn following Italian ryegrass was reduced by 1.9 relative to no previous crop. The plant height and LA1 were significantly reduced during early development when corn followed Italian ryegrass and late maturing Kodiak rye (p<0.05). The dry matter and estimated TDN yields of corn were significantly reduced when corn followed Italian ryegrass and late maturing Kodiak rye. The yield reductions for corn following Italian ryegrass, late maturing Kodiak rye and early maturing Koolgrazer rye, relative to com when no previous crops were planted, were 34, 17 and 8%, respectively. Therefore, the reduction in corn growth and yield in this experiment could be explained by an allelopathic effect resulting from the Italian ryegrass and rye residues. The highest total dry matter yield of 30,509kg/ha was obtained from an early maturing rye-corn double cropping sequence in combination among the eight cropping systems.

• 한국조경학회지
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• 제32권2호
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• pp.120-129
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• 2004

This study was carried out to develop new varieties with early maturing and large fruit size in the Korean native dogwood (Cornus kousa) for woody landscape plants from native sites or cultivated area. The results are obtained as follows; We selected strains with early maturing and large fruit. size from the habitats from 2000 to 2003. ‘SKK 2-1’ had 4.0cm of fruit size while 2.0 cm of native variety. In addition, ‘SKK 2-2’, ‘SKK 2-3’, ‘SKK 2-4’, and ‘SKK 2-5’ with large fruit and early maturing were preliminary selected from the habitats. In the preliminary selections, ‘SKK 2-1’ was finally selected as new early maturing variety with large fruits in 2003. New early maturing variety with large fruit size, C. kousa var. ‘SKK 2-1’ was selected from 200 plants of 5-year-old seedlings in C. kousa in 5-12 Nung wean ri Goo sung myun Yong In, Kyung gi do, Korea in 2000. Their fruits were colorized in September 18, 20∼25 days earlier than October 7 of native varieties. Its fruit diameter is larger than 4cm. Its fruit weight was 5 times as heavy as native cultivars grown in Korea. This useful characters were still inherited after grafting. However, characteristics of growth, leaf, flower, and flowering period were not different from those of native varieties. Therefore, it was very promising landscape woody plant, having large fruits in early fall season. The rooting rate of Korean dogwood was high by the IBA treatment. The optimum date for softwood cutting was on June 25 ∼ July 25 when the rooting rate was more than 80%. In addition. Korean dogwood was easily propagated by grafting. Therefore, new early maturing variety with large fruits, C. kousa var. ‘SKK 2-1’ is easily propagated by softwood cutting or grafting and then is a promising cultivar as a woody landscape plant.