Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Effects of Artificial Shading on Flowering and Growth of Maesa japonica Seedlings

차광 처리가 빌레나무(Maesa japonica)의 개화 및 생장에 미치는 영향

  • Park, Min Ji (Warm-temperate and Subtropical Forest Research Center, National Institute of Forest Science) ;
  • Seo, Yeon Ok (Warm-temperate and Subtropical Forest Research Center, National Institute of Forest Science) ;
  • Choi, Hyung Soon (Division of Global Forestry, National Institute of Forest Science) ;
  • Choi, Byoung Ki (Warm-temperate and Subtropical Forest Research Center, National Institute of Forest Science) ;
  • Im, Eun Young (Warm-temperate and Subtropical Forest Research Center, National Institute of Forest Science) ;
  • Yang, Ju Eun (Warm-temperate and Subtropical Forest Research Center, National Institute of Forest Science) ;
  • Lee, Chae bin (Warm-temperate and Subtropical Forest Research Center, National Institute of Forest Science)
  • 박민지 (국립산림과학원 난대아열대산림연구소) ;
  • 서연옥 (국립산림과학원 난대아열대산림연구소) ;
  • 최형순 (국립산림과학원 국제산림연구과) ;
  • 최병기 (국립산림과학원 난대아열대산림연구소) ;
  • 임은영 (국립산림과학원 난대아열대산림연구소) ;
  • 양주은 (국립산림과학원 난대아열대산림연구소) ;
  • 이채빈 (국립산림과학원 난대아열대산림연구소)
  • Received : 2021.06.30
  • Accepted : 2021.08.05
  • Published : 2021.10.01
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Abstract

Maesa japonica (Thunb.) Moritzi & Zoll. is a rare evergreen shrub that occurs in west Gotjawal, Jeju island, Korea. This study was conducted to investigate effects of an artificial shading on flowering and growth characteristics of M. japonica seedlings. The level of shading had been set to be 35%, 55% and 75% using shading net. The stage of flowering and flowering ratio, seedling height, the number of leaves and stems, leaf area were measured. Flowering timings were delayed by shading. The number of flowering seedlings per plot and inflorescences per seedling were the most in 55% shading level. Tendency of decreased seedling height with increased shading level was shown. The number of leaves and stems were the fewest values in 75% shading level. The increased biomass with decreased shading level was statistically significant. Aboveground and underground biomass were 2.1 and 1.7 times higher in shading 35% than in shading 75%, respectively. Meanwhile, all seedlings in non-shading plots were dead in winter. Such might be speculated as results of the light stress. As a result, we conclude that M. japonica vitally demands the shading for growth and the optimal shading levels for growth and flowering are 35% and 55%, respectively.

본 연구는 제주도 곶자왈 지역에 자생하는 빌레나무를 대상으로 차광 처리를 통해 세 가지 수준의 차광 조건(35%, 55%, 75%)에 따른 개화 및 생장 특성을 분석하였다. 차광률 증가에 따라 개화 시기가 지연되었고, 55% 차광 처리구에서 가장 많은 개체가 개화하였으며, 개체당 화서의 수도 높게 나타났다. 차광률이 증가할수록 묘고가 감소하였고 잎과 줄기의 수는 75% 차광 처리에서 가장 낮은 것으로 나타났다. 전체 및 부위별 생물량도 차광률 증가에 따라 감소하였으며, 35% 차광 처리구에서 75% 차광 처리구 대비 지상부 생물량 2.1배, 지하부 생물량 1.7배, 총 엽면적 2.0배 높은 것으로 나타났다. 종합적으로 고려하면 빌레나무는 건전한 생육을 위하여 차광 처리가 필요하며 개화는 55% 차광 수준, 생장은 35% 차광 수준에서 가장 양호한 것으로 판단된다.

Keywords

Acknowledgement

본 연구는 국립산림과학원 제주 곶자왈 및 특이산림생태계의 기능 증진을 위한 관리 기술 개발 과제를 통해 이루어진 것임.

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