Development of Techniques and Handling for SeedlingProduction of YeIIow-Poplar (Liriodendron tulipifera Linne)

백합나무 養苗技術 開發에 關한 硏究

Ryu, Keun-Ok;Kim, Hong-Eun
류근옥;김홍은

  • Published : 2003.09.30

Abstract

Liriodendron tulipifera L. has been well adapted to the Korean climate since it was first introducedfrom the U.S.A. in the 1960's. Recently, Korea Forest Service decided to disseminate L. tutiPifera asan afforestation tree species. However, there have been no guidelines developed for seedling productionof L. tuhpifera in Korea. Accordingly, this study was conducted to develop the optimal conditions forthe seedling production of L. tulipifera. For this purpose, Seeds were collected from a 40-year-o1d singletree planted in the garden of the Dept. of Forest Genetic Resources, Korea Forest Research Institute.Germination percentage was examined at different nursery conditions (i.e. green house, irrigation nursery,and field nursery) and with different seed covering materials (i.e. sawdust, soil, and sand). The optimalquantity of sowed seeds and optimal number of planting trees per nf were examined for the sake of theproduction of standard seedlings. Finally, the optimal time of root pmning was investigated in order toimprove survival rate and to promote early growth after afforestation. The highest germination percentage (92.6%) was observed in the seeds covered with sawdust in the green house, while the lowest germinationpercentage (10.8%) was investigated in the seeds covered with sand in the field nursery. The optimalquantity of sowed seeds turned out to be 50g/mU in the irrigation nursery and 150g/mU in the field nursery.Thirty five of standard seedlings were produced when 50 seedlings were planted per mU. The optimal timeof root pruning appeared to be the beginning of August. The T/R ratio of root-pmned seedlings was 45%,which was lower than that of root-pruned seedlings, and hairy roots were more developed in the root-pmned seedlings than in the root-unpruned ones.

1960년대 미국에서 도입된 이후 우리나라의 기후풍토에 잘 적응되어 그 우수성이 확인된 백합나무는산림청에서 경제조림수종으로 선정하여 보급할 계획으로 있다. 이에 백합나무의 양묘기술을 정립하기위하여 임업연구원 산림유전자원부 구내에 있는 40년생 백합나무에서 채취한 시과를 수집하여 4개월간노천매장 한 후 번식 시설 및 종자 덮기 재료에 따른 발아율, 규격묘 생산을 위한 mU당 적정 파종량 및생립본수. 조림 활착율 및 초기생장을 향상시킬 수 있는 적정 단근시기 등을 구명하였다. 파종 방법 및종자 덮기 재료를 달리하여 발아율을 조사한 결과 비가림 온실에서 톱밥으로 종자를 덮은 시험구가92.6%로 가장 우수한 발아율을 보였으며, 강우에 의존하는 노지파종에서 모래로 덮은 종자는 10.8%로가장 저조한 발아율을 보여 주었다. 관수시설을 설치하여 계속적으로 물 주기를 실시한 묘포장에서 종자 덮는 재료로 흙이나 톱밥을 사용하면 mU당 적정 파종량은 50g으로 충분하였으며, 자연상태에 읜존하는 일반 묘포장에서는 관수시설 묘포장에서와 같이 종자 덮는 재료를 동일하게 사용했을 때 mU당150트의 파종량이 적당한 것으로 나타났다. 관수시설 묘포장과 일반 묘포장에서 발아가 완료된 후- mU당 적정 생립본수는 50본의 유묘를 남겨둔 시험구에서 가장 많은 규격묘(35본)를 얻었을 수 있었다. 단근 작업의 적정시기는 생장이 왕성하고 뿌리의 재생 발달이 원활한 8월 초 ·중순으로 나타났으며, 단근을 실시한 묘목들은 비단근묘에 비해 T/R율이 45%정도 낮고 잔뿌리의 발달이 월등하게 향상되었다.

Keywords

References

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