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시비 처리가 백합나무 용기묘의 생장 및 생리적 특성에 미치는 영향

The Effects of Fertilization on Growth Performances and Physiological Characteristics of Liriodendron tulipifera in a Container Nursery System

  • 조민석 (국립산림과학원 산림생산기술연구소) ;
  • 이수원 (국립산림과학원 산림생산기술연구소) ;
  • 박병배 (국립산림과학원 산림보전부) ;
  • 박관수 (충남대학교 산림환경자원학과)
  • Cho, Min Seok (Forest Practice Research Center, Korea Forest Research Institute) ;
  • Lee, Soo Won (Forest Practice Research Center, Korea Forest Research Institute) ;
  • Park, Byung Bae (Division of Forest Ecology, Korea Forest Research Institute) ;
  • Park, Gwan Su (Department of Environment and Forest Resources, Chungnam National University)
  • 투고 : 2011.03.30
  • 심사 : 2011.04.22
  • 발행 : 2011.06.30

초록

시비는 시설양묘과정에서 반드시 실시되어야 하지만, 토양 및 계류수 오염의 문제를 야기할 수 있다. 이에 따라 본 연구에서는 시설양묘과정에서 시비량 조절에 따른 친환경적 경제적 시비방법 구명을 위해 Constant rate, Three stage rate 및 Exponential rate 등의 3 가지 시비 처리를 실시하였으며, 시비 처리에 따른 생장 특성 및 광합성, 엽록소 형광반응, 엽록소 함량 등을 조사 분석하였다. 그 결과, 근원경, 간장 및 물질생산량은 Constant 처리에서 가장 우수하였다. 묘목품질지수 또한 같은 경향을 보였지만, 유의적 차이는 나타나지 않았다. Exponential 처리구에서도 50%의 시비량으로 규격묘 생산이 가능했다. 광합성 능력은 세 처리구 모두 우수하였으며, 광화학 효율과 엽록소 함량은 Exponential 처리구에서 유의적으로 가장 낮게 나타났다. Exponential 시비 방법으로 생리 및 생장에 문제없는 규격묘를 생산할 수 있었다. 즉, 최소 비용의 최대 생장 효과와 함께 친환경적 시비 방법이라 할 수 있다.

Fertilization is essential to seedling production in nursery culture, but excessive fertilization can contaminate surface and ground water around the nursery. The objective of this study was to find optimal fertilization practice of container seedling production for reducing soil and water contamination around the nursery without compromising seedling quality. This study was conducted to investigate growth performance, photosynthesis, chlorophyll fluorescence, and chlorophyll contents of Liriodendron tulipifera growing under three different fertilization treatments (Constant rate, Three-stage rate, and Exponential rate fertilization). Root collar diameter, height, and biomass of L. tulipifera were the highest at Constant treatment. Like growth performance, seedling quality index (SQI) were higher at Constant than at other treatments, but not significantly different among treatments. L. tulipifera showed good photosynthetic capacity at all treatments. Photochemical efficiency and chlorophyll contents were significantly lower at Exponential than at other treatments. Therefore, Exponential fertilization which is 50% fertilizer of other treatments would maximize seedling growth and minimize nutrient loss.

키워드

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