Korean Journal of Breeding Science (한국육종학회지)

The Korean Society of Breeding Science (한국육종학회)
권호 표지

Growth performance among 12 provenances of 30 year-old loblolly pine (Pinus taeda L.) in Wanju, southern part of Korea

전북완주 지역에서 30년생 테다소나무 12개 산지간 생장특성

Kwon, Yong-Rak;Ryu, Keun-Ok;Choi, Hyung-Soon;Kwon, Hae-Yun;Ahn, Young-Hwan
권용락;유근옥;최형순;권해연;안영황

  • Published : 2007.12.31
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Abstract

Growth performances of 12 provenances originated from Southeast US were investigated in Wanju, Korea. Pitch-loblolly hybrid pine (Pinus rigida x P. taeda) was planted as comparisons. Analyses of variance for all the growth performances(height, D.B.H., volume growth and slenderness ratio) at the age of 30 were significantly different among provenances. Volume growth of loblolly pine was 1.3 times higher than pitch-loblolly hybrid pine. Latitude and longitude of seed origins were not significantly different with growth characteristics. Growth performances of southern provenances were generally better than those of other provenances. Averages of height, D.B.H. and volume growth were 15.6 m, 25.0 cm and 0.369 m3, respectively. Worcester Mass., Greene Ga. and Berkeley S.C. provenances were proved to be superior provenances, especially average individual tree volume growth of them was over 0.4 m3. A range of slenderness ratio was from 54.4% to 70.4% (average 64.6%). It means that diameter growth was better than height growth in Wanju test plantation. When the top 50% provenances based on the volume growth were selected considering the survival rate, we could expect that genetic gain for volume growth and survival rate would be 12.9% and 9.1%, respectively.

테다소나무의 생장은 포지에서는 산지간에 차이가 없었으나, 조림지에서 30년생에 이르면 수고, 흉고직경, 재적 등 모든 특성에서 산지간 차이가 있었으며 비교수종인 리기테다소나무에 비하여 재적생장이 약 1.3배 정도 우수한 것으로 나타났다. 평균생장은 수고 15.6 m, 흉고직경 25.0 cm, 재적 0.369 m3으로 나타났으며, 특히 Worcester, Greene, Berkeley산지는 0.4 m3이상의 재적생장을 보여 형질이 우수한 산지로 나타났다. 형상비 분석을 통한 수목의 안정성은 54.4~70.4%의 범위로 전체 평균 64.6%를 나타내 비교적 안정적으로 생장하는 것으로 판단되며 직경생장에 비해 수고생장이 다소 빈약한 것으로 분석되었다. 수령별 생장순위변동을 살펴보면 10년생때 우수했던 산지가 Berkeley 산지를 제외하고는 오히려 생장이 저조한 것으로 나타나 초기생장과 중기이후 생장의 경향이 상이한 것으로 분석되었다. 리기테다소나무의 화분수이용을 목적으로 산지선발을 할 경우 생존율을 고려하여 상위 50%의 형질이 우수한 산지를 선발하면 재적생장은 12.9%, 생존율은 9.1%가량 형질이 개선될 것으로 예상되며, 테다소나무 산지 선발시 유시생장과 중기생장의 산지간 순위 경향이 상이하므로 지속적인 조사를 통하여 신중하게 선발할 필요가 있다.

Keywords

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