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훈련 받은 집단과 받지않은 집단간의 과학적 창의성 비교 연구 : 국민학교 4·5학년 중심으로
박재호,김학수,김현아,백남권 釜山大學校 師範大學 1996 교사교육연구 Vol.33 No.-
This study examined the possibility of development of scientific creativity by training, and put on an emphasis if there is any difference in scientific creativity depending on the gender and the grade. The subjects of study are 40 students who trained scientific creativity and 80 students of K elementary school in Pusan : insincerely answered students were excluded and the rest was random sampling according to the gender and the grade. As result of verification of average difference between the trained group of S.C and untrained, the trained group bring out meaningful difference about the flexibility, the fluency, and the originality in some of lower parts of scientific creativity. This proves that scientific creativity can be developed by training. There are no statistically significant difference between the trained group of scientific creativity and the untrained group each other about the distinction of the gender. It proves that scientific creativity is not based on the distinction of the gender. According to the grade, the average of scientific creativity shows that the 5th grade students in the trained group, and the same meaningful difference on the whole. But there is no difference depending on the grade.
Effects of Ditching on Seedling Stand in Wet Direct Seeding Rice Culture
Nam-Hyun Back,Si-Yong Kang,Sang-Su Kim,Tae-Oh Kwon 韓國作物學會 2001 Korean journal of crop science Vol.46 No.1
In order to develop more stable seedling stand method in wet direct rice seeding culture, the effect of making the drainage ditches was studied in both methods of broadcast seeding on floody paddy surface and puddled-soil drill seeding. In a broadcast seeding on floody paddy surface, the ditching after seeding using a tractor or small ditch maker improved the seedling stand, and reduced the floating seedling and herbicide injury by accelerating the drainage. Suitable ditching time was at 2 days after seeding (DAS) for the tractor and at 3 DAS for the ditch maker. In the puddled-soil drill rice seeding culture, the ditching before seeding with a ditch maker at 3 days after draining effectively improved the seedling stand due to quick draining through well formed the seeding furrows. In the puddled-soil drill seeding, seedling stand number showed higher in both ditching plots synchronized with seeding compared with both only draining treatment at 1 DAS without ditching and the flooding plot condition for 6 DAS. And the suitable ditching depth was 6 cm, as considered the ditching status and drained status. These results suggest that the ditching in wet direct rice seeding is an resonable practice for improving the seedling stand through the accelerating drainage of field.
Effects of Ditching on Seedling Stand in Wet Direct Seeding Rice Culture
Back, Nam-Hyun,Kang, Si-Yong,Kim, Sang-Su,Kwon, Tae-Oh The Korean Society of Crop Science 2001 Korean journal of crop science Vol.46 No.1
In order to develop more stable seedling stand method in wet direct rice seeding culture, the effect of making the drainage ditches was studied in both methods of broadcast seeding on floody paddy surface and puddled-soil drill seeding. In a broadcast seeding on floody paddy surface, the ditching after seeding using a tractor or small ditch maker improved the seedling stand, and reduced the floating seedling and herbicide injury by accelerating the drainage. Suitable ditching time was at 2 days after seeding (DAS) for the tractor and at 3 DAS for the ditch maker. In the puddled-soil drill rice seeding culture, the ditching before seeding with a ditch maker at 3 days after draining effectively improved the seedling stand due to quick draining through well formed the seeding furrows. In the puddled-soil drill seeding, seedling stand number showed higher in both ditching plots synchronized with seeding compared with both only draining treatment at 1 DAS without ditching and the flooding plot condition for 6 DAS. And the suitable ditching depth was 6 cm, as considered the ditching status and drained status. These results suggest that the ditching in wet direct rice seeding is an resonable practice for improving the seedling stand through the accelerating drainage of field.
Nam Hyun Back,Sang Su Kim,Si Yong Kang,Min Gyu Choi,Hyun Tak Shin,Tae Oh Kwon 韓國作物學會 1999 Korean journal of crop science Vol.44 No.3
Unstable seedling stand establishment of wet direct seeding culture of rice is one of the major elements preventing the extension of its culture area. In order to develop methods of seedling stand improvement in direct seeded rice on flooded surfaces, three field experiments were conducted on silty loam soil using a cultivar 'Donjinbyeo' for three years, mainly focusing on water management after seeding and seed soaking with plant growth regulators (PGRs). Under the condition of shallow flooding after seeding, seedling stand rate increased and floating seedling rate decreased in both early and normal season seeding compared to deep flooding. With earlier draining time after seeding, there was a tendency towards preferential growth of the seminal root, increase of seedling stand and decrease of the floating seedling rate. Therefore the highest seedling numbers per unit area and the lowest floating seedling numbers were found upon drainage at 1 day after seeding (DAS), while a contrary tendency was shown upon conventional drainage at 7 DAS. Seed soaking with PGRs such as Metalaxyl or mixing of Metalaxyl with gibberellic acid (GA3 ) significantly increased the seedling stand. In addition the effects of PGR treatment on seedling stand and the early growth of plants were greater under flooded conditions than under drained conditions after seeding, although draining of water after seeding improved the seedling establishment rate more when compared with the PGR treatment. These results suggest that draining management after seeding or maintaining of shallow flooding for a week is the most effective method to improve the seedling stand rate in wet direct seeding.
Back, Nam-Hyun,Kim, Sang-Su,Kang, Si-Yong,Choi, Min-Gyu,Shin, Hyun-Tak,Kwon, Tae-Oh The Korean Society of Crop Science 1999 Korean journal of crop science Vol.44 No.3
Unstable seedling stand establishment of wet direct seeding culture of rice is one of the major elements preventing the extension of its culture area. In order to develop methods of seedling stand improvement in direct seeded rice on flooded surfaces, three field experiments were conducted on silty loam soil using a cultivar 'Donjinbyeo' for three years, mainly focusing on water management after seeding and seed soaking with plant growth regulators (PGRs). Under the condition of shallow flooding after seeding, seedling stand rate increased and floating seedling rate decreased in both early and normal season seeding compared to deep flooding. With earlier draining time after seeding, there was a tendency towards preferential growth of the seminal root, increase of seedling stand and decrease of the floating seedling rate. Therefore the highest seedling numbers per unit area and the lowest floating seedling numbers were found upon drainage at 1 day after seeding (DAS), while a contrary tendency was shown upon conventional drainage at 7 DAS. Seed soaking with PGRs such as Metalaxyl or mixing of Metalaxyl with gibberellic acid (GA$_3$) significantly increased the seedling stand. In addition the effects of PGR treatment on seedling stand and the early growth of plants were greater under flooded conditions than under drained conditions after seeding, although draining of water after seeding improved the seedling establishment rate more when compared with the PGR treatment. These results suggest that draining management after seeding or maintaining of shallow flooding for a week is the most effective method to improve the seedling stand rate in wet direct seeding.
백남현 ( Nam Hyun Back ),고종철 ( Jong Cheol Ko ),남정권 ( Jeong Kwon Nam ),최민규 ( Min Kyu Choi ),김보경 ( Bo Kyeong Kim ),양창휴 ( Chang Hyu Yang ),김택겸 ( Teak Kyum Kim ),김선 ( Sun Kim ),모영준 ( Young Jun Mo ),이경보 ( Kyo 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.4
This study was conducted to estimate the adaptability of some rice varieties for wet flooded direct seeding. Characters such as seedling stand, lodging index and milled rice yield are very important factors in order to get stable yield in direct seeding. These characters were compared among the 17 varieties which belong to early, medium, and mid-late maturity groups. Donganbyeo, Hoanbyeo, and Dongjinbyeo showed over 80 percent of seedling stand. Lodging did not occur in Daesanbyeo, Donganbyeo, Geumnambyeo, Ansanbyeo, Juanbyeo, Anjungbyeo, Hwanambyeo, and Obongbyeo. On the other hand, Geumobyeo, Hwayeongbyeo, Dongjinbyeo, and Nagdongbyeo showed severe lodging. The numbers of panicles and spikelets per in early maturing varieties were lower than those in medium and mid-late maturing varieties. There was no difference among medium and mid-late maturing varieties in the ratio of ripened grain. Milled rice yield was not different in medium or mid-late maturing varieties, whille in early maturing varieties it was different from 0.79 to 0.85MT/ha which was lower than in medium or mid-late maturing varieties. Consequently, Donganbyeo, Daesanbyeo and Hoanbyeo was desirable for wet flooded direct seeding in consideration of seedling stand, lodging and yield.
연구보문 : 호남지역 전북통에서 벼 부분경운 건답직파시 강우 후 파종작업 가능일수
백남현 ( Nam Hyun Back ),김택겸 ( Teak Kyum Kim ),고종철 ( Jong Cheol Ko ),남정권 ( Jeong Kwon Nam ),최민규 ( Min Kyu Choi ),김선 ( Sun Kim ),양창휴 ( Chang Hyu Yang ),김영두 ( Yong Doo Kim ),김시주 ( Si Ju Kim ) 한국국제농업개발학회 2010 韓國國際農業開發學會誌 Vol.22 No.4
호남지역 전북통(미사질양토)에서 벼 부분경운 건답직파시 강우 후 파종작업 가능일수를 구명하기 위하여 2000~2001년에 걸쳐 국립식량과학원 벼맥류부 벼 시험포장에서 동력분무기를 이용하여 강우량을 달리 처리한후 경과일수에 따른 토양수분, 쇄토율, 입모 및 쌀 수량 등을 검토한 결과를 요약하면 다음과 같다. 1. 미사질양토에서 강우 후 토양수분함량이 35%이하로 낮아질 때까지의 소요일 수는 강우량 5mm일 때 6일, 10mm 및 15mm일 때 9일, 20mm일 때 12일, 30mm일 때는 15일 이후였다. 2. 토양수분함량이 26.3~34.5%에서는 쇄토율이 58~82%, 입모수가 88~162개/m2이었으나, 토양 수분함량이 36.6%에서는 쇄토율이 52%, 입모수가 80개/m2이었다. 3. 쌀 수량은 토양수분함량이 26.3~34.5%에서는 별 차이가 없었으나, 토양수분함량이 36.6%에서는 m2당 수수 및 립수가 적어 쌀 수량이 현저히 감소하였다. 4. 따라서 호남지역 전북통(보통답)에서 부분경운 건답직파시 강우 후 파종작업 가능일수는 토양수분함량, 쇄토율, 입모, 벼 생육 및 쌀 수량 등을 종합해 볼 때 강우량 5mm일 때 4~5일, 강우량 10mm일 때 6~7일, 15mm일 때 8~9일, 20mm일 때 12일, 30mm일 때 15일이었다. To establish the system of partial-tillage direct seeding cultivation of rice in Honam Plain Area, we investigated the related factors such as possible days of seeding work and limitation of soil moisture after rainfall. This experiment was conducted in Jeonbuk series(fluvio marine alluvial soil) at National Institute of Crop Science in Iksan from 2000 to 2001. For the proper harrowing practice and acceptable rice seedling stand rate under partial-tillage direct seeding cultivation, the higher limit of soil moisture content after rainfall was determined below 34.5 %. To reach the available seeding day after rainfall in which soil moisture dropped below 34.5 %, 4-5 days was required at 5mm rainfall, 6-7 days at 10mm, 8-9 days at 20mm, and 15 days at 25mm, respectively.
신간척지에서 총체사료용 벼 주요 품종의 담수직파 적응성에 관한 연구
백남현 ( Nam Hyun Back ),조광민 ( Kwang Min Cho ),양창휴 ( Chang Hyu Yang ),신평 ( Pyeong Shin ),노태환 ( Tae Hwan Noh ),이건휘 ( Geon Hwi Lee ),박기훈 ( Ki Hun Park ) 한국국제농업개발학회 2014 韓國國際農業開發學會誌 Vol.26 No.3
This study was carried out to investigate the adaptability of major whole crop silage rice varities to the wet seeding in the new reclaimed land during 2012 to 2013. Seeding stand ratios were 48% for Nokyang and Suweon 552, and 40 ~ 42% for Mogwoo, Mogyang and Suweon544. The heading dates were August 26 ~ 27 for Nokyang and Mogyang, September 1 ~ 5 for Suweon 552 and Suweon544, and September 15 for Mogwoo. Number of panicles per square meter varied 278 ~ 333 depending on the tested varieties. Lodging occurred in Suweon552 slightly, and did not occur in the other varieties. Dry matter yield per ha was 15.8 ~ 16.8 tons for Mogwoo and Suweon552, and 13.1 ~ 14.3 tons for Suweon 544, Mogyang and Nokyang. Crude protein content of varieties was 4.5 ~ 6.4%; ADF, 27.1 ~ 30.1%; NDF, 49.2 ~ 53.9%; TDN, 65.1 ~ 67.4%. These results suggest that Mogwoo and Suweon 552 are the whole crop silage rice varieties suitable for wet seeding in the new reclaimed tidal land.