맥류의 한해와 내동성에 관하여

남윤일,연규복,구본철 한국작물학회 1989 Korean journal of crop science Vol.34 No.2

There are several meterorolgical stresses in the winter cereal crops. Among these stresses, cold injury is one of the most important stresses for wheat and barley production in Korea. The reduction in grain yield of the wheat and barley due to cold injury has occurred almost every year in Korea. The objective of the study was to get the basic information in relation to the cold injury and to detect the method minimizing the damage of cold injury. When the air temperature was the ranges of -13$^{\circ}C$ to -15$^{\circ}C$, the soil temperature at the crown part of the plant was very stable, whereas in the ranges of -2$^{\circ}C$ to -3$^{\circ}C$ the soil surface temperature was more unstable and cold than air and subterranean temperatures. The different parts of the plant in wheat and barley possess the different levels of cold hardiness. In comparison to the cold hardiness of plant parts, the leaf and crown are the less sensitive to cold injury than root and vascular transitional zone. The type and extent of stress is determined by the redistribution pattern of water during freezing. These types from freezing processes were three types: a) Equilibrium freezing pattern b) Non -equilibrium freezing pattern, c) Non-equilibrium freezing pattern typical of tender tissues. Cold hardiness in wheat plants were more harder than barley plants at vegitative stage, but inverted at the reproductive stage. Injuries by low temperature during the seasons of barley cultivation in Korea were occured mainly in four stage; in the first and third stage, frost injury occurs, the second stage, freezing injury, and the fourth stage, chilling injury.

대맥의 등숙기간중 엽신의 노화와 동화산물의 전류와의 관계

南潤一,具本哲,延圭復,孟敦在 한국작물학회 1991 Korean journal of crop science Vol.36 No.1

본 시험은 대맥 등숙기간중 급속한 온도상승과 고온건조 및 과습 등 불량환경으로 맥체가 급격히 노화되어 충분히 등숙되지 않은 상태에서 성숙이 이루어지기 때문에 우리나라의 대맥은 품질이 불량할 뿐만 아니라 수량성도 외국에 비해 떨어지고 있는 실정이다. 따라서 등숙기의 엽신노화와 동화산물의 전류특성과의 관계를 구명하여 등숙향상을 위한 품종 육성 선발의 기초 자료로 이용코자 실시하였던바, 결과를 요약하면 다음과 같다. 1. 등숙일수 경과에 따른 엽신의 생엽수 및 노화속도는 품종에 따라 큰 차이가 있었다. 2. 입출전 및 동화물질의 전류속도는 엽신의 노화가 빠른 품종군이 늦은 품종군에 비해 빠른 것으로 나타났다. 3. 엽위 및 기관별로 14 C 물질의 전류 양상을 본 결과, 등숙초기에는 노화가 빠른 품종군은 산위엽(지엽, 2엽)과 하위엽 ( 3, 4, 5엽)에 흡수된 14 C의 량이 이삭으로 전류되는 비율이 비슷하였으나 등숙이 진전되면서 상위엽에 흡수된 14 C은 전류가 급격히 이루어지나 하위엽은 반대의 경향이고, 노화가 늦은 품종군은 등숙초기에는 하위엽의 전류속도가 월등히 높고 하위엽은 낮으나 등숙이 진전되면서 반대의 양상으로 나타났다. 4. 경엽에 흡수된 14 C이 종실로 정류되는 양상과 입충전속도가 엽신의 노화속도 조만 품종군별로 일치하는 경향이었다. 5. 광합성 속도는 등숙중기까지는 엽신노화가 빠른 품종이 높았으나 중기후는 낮았다. 6. 종실수량은 엽신의 노화속도가 빠른 품종군이 다소 높은 경향이었다. The study aimed to investigate the relationship between the rates of leaf senescence and photosynthate translocation at post-anthesis. Seven barley varieties were observed at Suweon in 1988-89. The varieties differed significantly in the number of leaves survived and the rate of photosynthate transolcation with the progress of grain filling. The rate of grain filling was higher in the fast leaf sene-scencing varieties than the slow senescencing ones. There was a close coincidence between the rates of grain filling and ~ 14/c translocation into grains. Photosynthesis was higher in the fast leaf senescencing varieties at early stage of grain filling, but the reverse phenomenon was observed at the late stage of grain filling. The grain yield of fast senescencing varieties was higher than that of slow ones.

냉온처리 전후의 광환경 조건이 오이 묘의 생존율에 미치는 영향

남윤일,우영회,김형준 (사) 한국생물환경조절학회 2001 생물환경조절학회지 Vol.10 No.3

This study was conducted to investigate the influence of light condition before and after chillingtreatment started at different times of a day on the survival and physiological responses of cucumberseedlings grown in a greenhouse. Percent survival of cucumber seedlings exposed to a chilling temper-ature of 2oC for 48 hours varied considerably depending upon the initiation time of chilling treat-ment. Seedlings exposed to chilling treatment from 7:00 o'clock, the end of a dark period, showedconsiderably lower % survival of 30.6% as compared to 90.2% in those exposed to the same treat-ment starting from 18:00 o'clock, the end of a photoperiod. This difference in % survival was found tobe closely associated with content of photosynthetic assimilates in seedlings. Relative amount of elec-trolyte leakage was 57.1% in seedlings chilled from 7:00 o'clock and 25.9% in seedlings chilled from18:00 o'clock. Among the ions found in the electrolyte leakage, content of K+ was the greatest, fol-lowed by that of Na+, Mg+ and Ca+2. Light illumination for 2 hours or longer shortly before chillingtreatment during the dark period was effective in increasing % survival of seedlings, probablybecause of increased photosynthetic assimilates in seedlings. Light illumination during a 48 hour chill-ing treatment at 3oC significantly reduced % survival to 43.3% as compared to 92.0% in seedlingskept continuously in darkness.

대맥의 등숙기간중 엽신의 노화와 동화산물전류의 품종간 차이

南潤一,具本哲,延圭復 韓國作物學會 1991 Korean journal of crop science Vol.36 No.2

출수후 등숙기간 동안에 엽신의 노화속도와 동화산물의 전류특성과의 관계를 구명하며 등숙향상 및 단기등숙 품종육성을 위한 선발지표를 제공코자 엽신의 노화정도가 다른 올보리외 29품종 및 계통을 공시하여 엽신 노화율, 등숙율 및 상호 상관관계를 조사하였던 바 결과를 요약하면 다음과 같다. 1. 엽신의 노화속도 및 입충전속도(등숙율)는 계통에 따라 큰 차이가 있었다 2. 등숙초·중기(출수후 10-20일) 및 등숙중·후기(출수후 20-30일)의 엽신 노화율과 해당 각 시기의 등숙율과는 높은 정의 상관관계가 있었다. 3. 등숙초·중기의 엽신 노화율과 등숙전기간(출수후 10-35일)의 등숙율과는 부의 상관이 등숙중·후기의 엽신 노화율과는 고도의 정의 상관관계가 있었다. 4. 입중과 등숙중·후기 및 등숙전기간의 등숙율과는 고도의 정의 상관관계가 있었으나 등숙초·중기의 등숙율 및 등숙일수와는 상관이 없었다. 5. 노화지수의 감소 양상은 계통에 따라 4가지 유형으로 분류할 수 있었는데 종실수량 및 등숙율면에서 가장 이상적인 유형은 IV형이었다 6. 본 시험결과 단기등숙형 대맥 품종으로 가장 이상적인 형은 등숙초·중기에는 노화지수가 높으면서도 노화속도가 느리나 등숙중·후기에는 노화속도가 빠른 품종임이 구명되었다. In order to determine the relationships between the rates of leaf senescence and photosynthate translocation during the grain filling periods in barley, field experiments were conducted through 1989/1990 crop year. Thirty barley varieties and lines having different leaf senescence were used for the experiments. Varieties differed significantly in the rate of leaf senescence and rate of grain filling. The rate of leaf senescence at early (10-20days after heading) and late period (20-30days after heading) during of grain filling were positively correlated with the rate of grain filling in same period, respectively. But the rate of leaf senescence at 10-20 days after heading negatively correlated with the rate of grain filling during the whole grain filling period (10-35 days after heading). Whereas, the rate of leaf senescence at late period was positively associated with the rate of grain filling during the whole grain filling period. Rates of grain filling at the late and whole periods have positively influence on grain weight(r=0.62**~-0.93**), but rate of leaf senescence at early period and duration of grain filling negatively correlated with the grain weight (r=-0.33~ -0.15). The patterns of leaf senescence index for the varieties tested were grouped by four. Among these patterns, the most ideal pattern was IV type.

시설원예 환경조절의 문제점과 대책

남윤일 한국생물환경조절학회 2002 한국생물환경조절학회 학술발표논문집 Vol.- No.-

오이묘의 저온처리가 생육, 과실특성 및 수량에 미치는 영향

남윤일,우영회,홍규현,이관호,서규선,김종구,Nam, Y.I.,Woo, Y.H.,Hong, K.H.,Lee, K.H.,Suh, G.S.,Kim, J.K. 국립한국농수산대학교 교육개발센터 2008 현장농업연구지 = Journal of practical agricultural resear Vol.10 No.1

This study was conducted to investigate the influence of chilling temperature and duration at different seeding stages on yield, fruit characteristics and growth of cucumber in a greenhouse. When 20-day-old cucumber were exposed to 0 and 3℃ for 10 hours, 25 and 30% reduction in the main stem elongation rate and 34 and 37% reduction in total leaf area per plant were observed. The reduction in stem elongation and total leaf area was apparently associated with the increases in chilling duration. Exposure of seedlings to 6℃ failed to causes any significant differences in growth as compared to the unchilled plants. Repeated exposure of seedlings to 3℃ chilling for 10 hours per day increased the chilling injury significantly. The seedlings exposed to low temperature for 3 consecutive days exhibited severe injury as compared to the seedlings exposed to chilling treatment only once or twice. Fruit elongation rate was inhibited by approximately 10%, such as 0.59~2.26cm/day, with chilling of 15 hours at 0℃ as compare to 0.61~2.60cm/day in the non-chilled plants. Chilling treatment at 0~3℃ for 10 hours reduced the percentage of marketable fruits by 25~26%. while it increased the percentage of severely bent fruits significantly. Total fruits yield was reduced by 15~25% in cucumber plants when the chilling treatment was given to 20-day-old seedlings and by 22~37% in 30-day-old seedlings. This shows that, Larger seedlings were more sensitive to chilling. Total yield was also influenced by the duration of chilling. Definitely, at 0℃, 5-hour chilling treatment caused 18% of reduction, 10-hour caused 30%, and 15-hour caused 36%, respectively.

질소의 추비가 소맥엽신의 기공개도에 미치는 영향

남윤일,하용웅,정규용 한국작물학회 1982 한국작물학회 학술발표대회 논문집 Vol.1982 No.-

컴퓨터를 이용한 施設園藝의 環境管理 시스템

南潤一 韓國施設園藝硏究會 1992 施設園藝硏究 Vol.5 No.2

大麥의 登熟期間中 葉身의 老化와 同化產物의 轉流와의 關係

南潤一,具本哲,延圭復,孟敦在 한국작물학회 1991 한국작물학회지 Vol.36 No.1

순환식 수경재배의 현황 및 문제점과 금후 발전방향

남윤일 한국생물환경조절학회 2004 시설원예연구 Vol.17 No.1