[논문]시비처리에 따른 상동나무 용기묘의 생장 및 생리특성

어현지; 손용환; 박성혁; 박광훈; 이경철; 손호준

doi:10.14578/jkfs.2021.110.2.189

시비처리에 따른 상동나무 용기묘의 생장 및 생리특성
Growth and Physiological Characteristics of Containerized Seedlings of Sageretia thea at Different Fertilization Treatments 원문보기

한국산림과학회지 = Journal of korean society of forest science, v.110 no.2, 2021년, pp.189 - 197

어현지 (국립산림과학원 산림약용자원연구소) , 손용환 (국립산림과학원 산림약용자원연구소) , 박성혁 (국립산림과학원 산림약용자원연구소) , 박광훈 (국립산림과학원 산림약용자원연구소) , 이경철 (한국농수산대학 산림학과) , 손호준 (국립산림과학원 산림약용자원연구소)

초록
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본 연구는 다양한 효능·효과가 최근에 입증된 상동나무를 대상으로 다목적 수용성 복합비료를 농도(0.5 g·L^-1, 1.0 g·L^-1, 1.5 g·L^-1, 2.0 g·L^-1)처리에 따른 생장특성(간장, 근원경 및 H/D율)과 생리특성(광합성, 엽록소 함량 및 형광반응)을 정량화하여 적정 시비 수준을 알아보고자 실시하였다. 간장생장은 시비농도가 1.5 g·L^-1까지 높아짐에 따라 생장량이 증가했으나 2.0g·L^-1 시비처리에서는 낮아졌다. 근원경 생장은 시비농도가 높아짐에 따라 생장량은 유의하게 낮아졌다. 광합성 반응은 1.5 g·L^-1 시비처리에서 엽육세포 내 CO₂ 반응곡선, 최대광합성효율, 최대 카르복실화 속도가 가장 높았다. 엽록소 형광반응과 엽록소 지수는 무처리구에 비해 시비처리구에서 유의적으로 광합성 기구의 효율을 높이고 있음을 확인하였다. 따라서 우량한 묘목품질의 상동나무를 생산하기 위한 시비 수준은 1.0~1.5 g·L^-1 농도라고 판단된다.

Abstract ▼ AI-Helper

This study aims to optimize the appropriate concentration of fertilizers for Sageretia thea by analyzing growth performances (height and root collar diameter) and physiological characteristics (photosynthesis, chlorophyll contents, and chlorophyll fluorescence reaction). As fertilizer concentration was increased to 1.5 g·L-1, growth increased, but it decreased at 2.0 g·L-1 treatment. Root collar diameter growth was reduced because of higher fertilizer concentrations. Photosynthesis reactions showed the highest CO2 reaction curves, maximum photosynthesis rate, and maximum carboxylation rate in the 1.5 g·L-1 fertilizer treatment. The chlorophyll fluorescence reaction and SPAD values revealed that fertilizer treatment improves photosynthesis efficiency and robustness compared with untreated control. Therefore, the appropriate fertilizer concentration for producing good seedling quality of Sageretia thea is 1.0~1.5 g·L-1.

주제어

표/그림 (8)

표 Table 1. Physical and chemical properties of media used in container seedling production.
표 Table 2. The root collar diameter, height, and H/D ratio of S. thea under different fertilizing treatment.
그림 Figure 1. The growth patterns of root collar height (A) and root collar diameter (B) of fertilizing treatment of S. thea during 15 weeks measurement. Lines show each relative growth rate with repeated measures of ANOVA by Duncan's multiple range test at 5% levels.
그림 Figure 2. The Height divided by Root collar diameter (H/R) patterns of S. thea during 15 weeks measurement. Repeated measures of ANOVA by Duncan's multiple range test at 5% levels.
그림 Figure 3. Effects of different fertilization treatments on maximum photosynthesis rate (P_{N max}), stomatal transpiration rate (E), stomatal conductance (g_s), intercellular (Ci) / atmospheric CO₂ concentration (Ca), intrinsic water use efficiency (WUEi) and instantaneous transpiration efficiency(ITE) in the leaves of S. thea (on PPFD 1,000 μmol·m^-2·s). Each value is expressed as the means ± SD (n =5). *Means with difference letters are significantly different by DMRT (Duncan's Multiple Range Test) at 5% level (p < 0.05).
그림 Figure 4. The P_N-Ci curves of S. thea grown under five different fertilization treatments. Each value is expressed as the mean (n = 3).
표 Table 3. The photosynthetic parameters of S. thea grown under five different fertilization treatments.
표 Table 4. The chlorophyll fluorescence parameters of S. thea grown under five different fertilization treatments.

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