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단일처리전 장일처리 기간이 온실재배 스프레이 절화국의 영양생장에 미치는 영향
백철기,정순주,조경철,이정현,한태호 (사) 한국생물환경조절학회 2002 시설원예‧식물공장 Vol.11 No.4
This study was conducted to examine the effect of long-day (LD) period before short-day (SD) treat-ment on the vegetative growth of greenhouse-grown cut chrysanthemum cv. Reagan Improved atWageningen Agricultural University, The Netherlands. Rooted cuttings of cut chrysanthemum cv.Reagan Improved were transplanted on 6th, 13th, 20th of September and all of them were treatedwith LD before SD treatment on 27th of September. The periods from transplanting until final har-vest were 70, 77, and 84 days for 1, 2, and 3 week-LD treatment, respectively. The final plant heightincreased in the plot of 3 week-LD period and decreased in the plot of l week-LD period before the SDtreatment. Total fresh weight and the leaf area were increased more in the plot of 3 week-LD periodthan that of 1 week-LD period, but the absolute growth rate after SD treatment was the same on plantgrowth rate and increase of the number of leaves in all treatments. The final dry matter production(gm-2) was increased more in the plot of 3 week-LD period than that of 1, 2week-LD period beforeSD treatment. Plant height and fresh weight were followed by the condition of LD period. In addition,dry mass production was highest in 3 week-LD period.