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적화처리가 ‘Derby’와 ‘Cupra’ 파프리카의 건물생산량 및 광합성 효율에 미치는 영향
이정현(Jeong Hyun Lee),차종철(Jong Chul Cha) 한국원예학회 2009 원예과학기술지 Vol.27 No.4
Two different cultivars, ‘Cupra’ and ‘Derby’, of sweet pepper (Capsicum annum L.) plants were grown with fruits (CON) or without fruits, removed of all flowers (RF) on stems, at glasshouse from 12 February to 6 June, 2008. We studied the influence of removing flowers on plant characteristics, dry matter distribution and dry matter production. When plants were grown with RF, plant height and number of internodes were increased by 18% and 24%, respectively. Vegetative part of plant was increased by 70% for leaves, 88% for stem and 114% for root than vegetative organs in CON. Strong generative growth, on the other hand, could be inhibited the growth and development of vegetative organs. The treatment with RF was promoted dry matter distributed into vegetative organs by 11 to 20.5% point; especially, stem was much larger than control. Large leaf area, leaf area index and low specific leaf area (SLA) were measured at RF treatment. Low SLA implied a high leaf weight per unit of leaf area, which means thicker leaf than CON. High leaf area index showed high light interception, consequently, high dry mass production would be expected at RF treatment. Total dry mass including root and fruit, however, was not different between the treatments. Stomata conductance (SC) was observed much lower in ‘Cupra’ than ‘Derby, which was 13% and 64% lower than control, respectively. The crop showed lower light use efficiency (total dry mass per unit intercepted photosynthetically active radiation integral, g MJ?¹) with lower SC at RF treatment. Low SC could indicate low photosynthesis rate, and hence low light use efficiency and less extend dry mass production at RF treatment.