Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Effect of Initial Seedling Size and Root Pruning Intensity on Above-ground and Root Development in Quercus serrata Seedlings after Transplanting

초기 묘목크기와 단근강도가 이식 후 졸참나무의 지상부 및 뿌리발달에 미치는 영향

  • Na, Sung-Joon (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Kim, In-Sik (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Lee, Do-Hyung (Department of Forest Resources, Yeungnam University) ;
  • Lee, Wi-Young (Department of Forest Genetic Resources, Korea Forest Research Institute)
  • 나성준 (국립산림과학원 산림유전자원부) ;
  • 김인식 (국립산림과학원 산림유전자원부) ;
  • 이도형 (영남대학교 산림자원학과) ;
  • 이위영 (국립산림과학원 산림유전자원부)
  • Received : 2013.03.14
  • Accepted : 2013.08.02
  • Published : 2013.08.31
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Abstract

This study was conducted to determine the optimum intensity of root pruning and the initial seedling size of 1-year-old Quercus serrata for producing 2-year-old healthy seedlings. Large( > 26 cm hight) and small size ( < 24 cm hight) seedlings were pruned their root by the length of 5, 10, and 15cm and then transplanted on nursery. Stem height, root-collar diameter(RCD), height to RCD ratio(H/D ratio), shoot dry weight(DW) and root development were measured during first growing season after transplanting. Seedling size and pruning intensity influenced on shoot growth such as height, RCD, H/D ratio and DW after transplanting. In addition, the development of lateral roots such as number, length, DW and diameter were affected by the seedling size. Taproot pruned by 15cm was shown excellent above-ground growth in large seedling group, but pruned by 10 and 15cm showed respectively better shoot growth in small seedling group. Large seedlings increased their above-ground growth, taproot regrowth, and number of lateral roots more than those of the small seedlings. But the length and DW of lateral roots were increased in the small seedlings. In conclusion, in order to produce high quality 2-year-old seedlings, it is important to produce large size of Q. serrata seedlings. Also root pruning length of 1-year-old Q. serrata was reasonable on 15 cm in taller than 26 cm or 10cm in less than the height.

본 연구는 졸참나무의 건전한 1-1 조림용 묘목을 생산하기 위해 초기 묘고가 다른 묘목에서 적절한 단근의 강도를 구명하기 위해 실시하였다. 이를 위해 1-0 노지묘의 크기를 구분하여 단근(5, 10, 15 cm)을 실시하였다. 1년의 생육기간이 지난 시점에서 묘고를 비롯한 지상부 생장량과 주근 및 측근의 발달 특성을 비교 분석하였다. 지상부의 생장은 초기 묘목 크기와 단근에 의해 다양한 차이가 나타났으며, 측근의 발달은 묘목 크기에 따른 영향이 큰 것으로 나타났다. 초기 묘고가 큰 묘목군에서는 15 cm로 단근된 묘목이 가장 우수한 지상부 생장량을 나타내었으며, 초기 묘고가 작은 묘목군에서는 15 cm와 10 cm로 단근된 묘목이 우수한 생장량을 나타내었다. 묘목 크기에 따른 생장은 초기 묘고가 큰 묘목이 작은 묘목보다 우수한 지상부 생장을 나타내었으며, 주근의 재생산량과 새롭게 발달된 측근의 수도 많았다. 하지만 측근의 길이 및 무게 생장은 작은 묘목이 더 많았다. 결론적으로 본 연구결과를 종합해 보면, 고품질의 묘목을 생산하기 위해서는 묘고가 큰 1-0묘를 생산하는 것이 다양한 장점을 가지며, 초기 묘고가 26 cm 이상의 큰 묘목은 15 cm로 단근하고, 초기 묘고가 24 cm 이하의 묘목은 10 cm로 단근하는 것이 가장 이상적인 단근길이라고 판단된다.

Keywords

References

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