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Climatic Factors Affecting Bud Flush Timing of Pinus densiflora Provenances

소나무 산지의 개엽시기에 영향을 미치는 기후인자

  • Kim, In Sik (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Ryu, Keun Ok (Department of Forest Genetic Resources, Korea Forest Research Institute) ;
  • Lee, Joo Whan (Department of Forest Genetic Resources, Korea Forest Research Institute)
  • 김인식 (국립산림과학원 산림유전자원부) ;
  • 유근옥 (국립산림과학원 산림유전자원부) ;
  • 이주환 (국립산림과학원 산림유전자원부)
  • Received : 2012.08.24
  • Accepted : 2012.11.28
  • Published : 2012.12.30

Abstract

This study was conducted to investigate the climatic factors affecting bud phenology of Pinus densiflora provenances. Data were collected from Jungseon, Chungju and Jeju plantations which were parts of the 11 provenance trials established by Korea Forest Research Institute in 1996. The 36 provenances were included in this trial ($33^{\circ}30^{\prime}{\sim}38^{\circ}08^{\prime}$ in latitude and $126^{\circ}30^{\prime}{\sim}129^{\circ}20^{\prime}$ in longitude). The bud swelling date and bud burst date of the provenances were investigated from March to May in 2004 in two-day interval. The four geographic factors and fifteen climatic factors of the test sites and provenances were considered in this study. Canonical correlation analysis was conducted to examine the major factors affecting the bud phenology. Our results suggested that the major factors affecting the timing of bud swelling and burst are the differences in latitude, longitude, extremely low temperature (during December-February), extremely high temperature (during November-February) and annual mean growing days between test plantation and provenance. The provenances with lower winter temperature than that of plantation showed the faster bud swelling and bud burst. Based on these results, the implication on the seed transfer of P. densiflora was discussed.

본 연구는 소나무 산지의 개엽시기에 영향을 미치는 기후인자를 구명하기 위해 수행되었는데 1996년 국립산림과학원에서 조성한 정선, 충주, 제주의 소나무 산지시험림에서 조사가 이루어졌다. 휴면 중이던 동아가 부풀어 오르는 시점을 생장개시기로, 신초가 포린을 뚫고 나와 0.5mm 정도 자란 시점을 개엽시기로 정해 2004년 3월말부터 5월 중순까지 2일 간격으로 조사를했다. 개엽시기에 대한 산지 기후인자의 영향을 구명하기 위해 조림지와 산지의 기후인자를 구했으며, 각 기후인자의 생태적거리를 구해 공준상관 분석을 실시했다. 조림지별 생장개시기와 개엽시기는 제주, 충주, 정선 조림지 순으로 빨라 조림지의 평균 기온 차이에 따른 구배를 보여주었다. 종자산지의 기후인자 차이가 조림지에서의 생장개시기 및 개엽시기에 미치는 영향을 구명하기 위해 생태적거리 자료를 이용하여 공준상관 분석을 실시한 결과, 조림지와 산지 간 위도, 경도, 12~2월 최저기온, 11~2월 최고기온 그리고 생육기간 차이가 주요 인자인 것으로 추정되었다. 결론적으로 조림지보다 겨울철 기온이 낮은 곳에서 온 산지가 생장개시 및 개엽시기가 빠른 전형적인 북-남 또는 저온-고온 경사변이를 나타내 소나무 산지에 따른 지리적 유전적 변이가 존재하는 것을 확인할 수 있었다.

Keywords

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