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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.
麥類의 世代促進方法에 關한 硏究 Ⅱ. 平地와 高嶺地를 利用한 年2回 世代促進栽培
C. H. CHO(曺章煥),W. S. AHN(安完植),Y. I. NAM(南潤一),K. H. JI(池光鉉) 한국육종학회 1978 한국육종학회지 Vol.10 No.1
In order to examine the possibility of the growing two generations in one year of segregating wheat and barley populations, three wheat and three barley varieties were direct seeded and transplanted after vernalization while F₃ wheat and barley populations were transplanted following vernalization at an alpine location during the summer season. These results showed that with wheat and barley segregating line: with a winter growth habit grade of less than IV, it was possibly to grow two generations in one year by using the methods of germinating the immature seed and seed-green vernalization, and the transplanting at Daekwanleung before early part of July. This experiment tested the possibility of growing two generations of wheat and barley in one year in Korea by growing a summer generation at the alpine location of Daekwanleung. A winter generation was grown at either Suweon, Mooan or Cheju in Korea. The results are as fellows: 1. All the wheat and barley varieties with a winter growth habit grade of less than IV headed when direct seeded at Daekwanleung before than May 25. 2. The adequate seed-green vernalization period for both barley and wheat was 30 to 35 days and the proper transplanting time after vernalization was late June to early July. 3. Wheat and barley segregating lines with winter growth habit grades of less than IV can produce to generations in one year by using the methods of germinating the immature seed and seedgreen vernal ization, if transplanting occurs at Daekwanleung before the early part of July.