Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
권호 표지

Seasonal Changes in Dry Matter Productivity of Korean Native Plants, Aster koraiensis, Iris ensata, and Hemerocallis fulva

한국자생식물 벌개미취, 꽃창포, 원추리의 생육시기별 건물생산성 변화

Nam, Hyo-Hoon;Lee, Hyun-Sook;Woo, Jin-Ha
남효훈;이현숙;우진하

  • Published : 2009.09.30
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Abstract

This study was conducted to investigate the seasonal changes of dry matter productivity of three species of Korean native plants, Aster koraiensis, Iris ensata, and Hemerocallis fulva. Dry weight of aboveground organs from transplanting to flowering and that of underground organs after flowering respectively contributed to the greatest part of whole dry weight. Ratios of dry weights of the aboveground and underground organs in the first year were higher than that in the second year, indicating that assimilation product was distributed more to storage organs, rhizome or tuberous root in the second year. There was one peak point in relative growth rates (RGRs) and net assimilation rates (NARs) of A. koraiensis and H. fulva, while there were two peak points in I. ensata at the same year. Those points were concurrent with an early growth stage and an enlargement period of storage organs. The distribution of photosynthetic organ changed in the similar pattern of RGR or NAR. Changes of specific leaf area for yearly averages of crop growth rate (CGR) of A. koraiensis, I. ensata and H. fulva were 4.6, 6.9, and 3.3 g.m$^{-2}$.d$^{-1}$ in the first year, and 23.4, 31.5, and 14.7 g.m$^{-2}$.d$^{-1}$ in the second year, respectively. NAR or leaf area index was positively correlated with CGR. There was a positive correlation between soil moisture and LAI, while a negative correlation was observed between NAR and climatic factors.

한국자생식물 3종의 작물화를 위하여 1차 생산성을 평가하고 생산성 향상을 위한 기초 자료를 얻고자 본 연구를 수행하였다. 정식 후부터 개화기까지는 지상부의 건물중이, 개화 후는 지하부 건물중의 증가가 전체 건물중 변화에 많은 영향을 주었다. T/R률의 연차간 평균은 정식 1년차가 정식 2년차에 비해 높아 생육시기가 경과하면서 저장기관의 동화산물 축적량이 증가하였다. 벌개미취와 원추리의 상대생장률, 순동화율은 연차별로 1회, 꽃창포는 2회의 최대값을 보였고 상대생장률과 순동화율은 고도의 정의 상관관계를 보였다. 작물생장률의 정식 1, 2년차 평균은 각각 벌개미취 4.6, 23.4g.m$^{-2}$.d$^{-1}$, 꽃창포 6.9, 31.5g.m$^{-2}$.d$^{-1}$, 원추리 3.3, 14.7g.m$^{-2}$.d$^{-1}$이었으며 식물종의 잎 분화특성에 따라 순동화율 또는 엽면적지수와 정의 상관이 인정되었다. 생장특성 해석 형질과 기상요인과의 관계에서 평균기온이 식물체 전체의 상대생장률과, 토양수분과 엽면적지수간 유의한 정의 상관을 보였고 순동화율은 기상요인과 부의 상관을 보였다.

Keywords

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