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갯버들(Salix gracilistyla)의 관리를 위한 종자 발아와 유묘의 생장 특성 연구
Study on Characteristics of Seed Germination and Seedling Growth in Salix gracilistyla for Invasive Species Management

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Authors
최호; 김재근
Issue Date
2015
Publisher
Korea Society of Environmental Restoration Technology
Citation
Journal of the Korea Society of Environmental Restoration Technology, vol.18 no.3, pp. 1-17
Keywords
Ecological controlEnvironmental sieveLight intensitySeed recruitmentWater level
Abstract
To suggest ecological management plans for invasion of Salix gracilistyla, stepwise environmental
sieve of seed dispersal, germination, seedling and juvenile stages were investigated. About 84% of total
seeds were released between May 6 and 10. Germination rates significantly declined with decrease of
light intensity from 100% to 30% and 0% (p<.001), but above 60% of seeds germinated in all
treatments. Difference of germination rates with 0 and 2cm water level was not significant (p = .571).
With increase of elapsed time after seed dispersal, germination rates significantly decreased (p<.001),
and seed viability was lost within 16 days. Considering both germination rate of seed and survival
rate of seedling, survival rate of all dispersed seeds was only 5% when 8 days passed after seed
dispersal. All 22-day-old seedlings (height: 1cm) died under flooding of twice level as its height. With
decrease of light intensity from 100% to 30%, survival rates of seedling decreased from 90% to 33%
(p<.001). In the case of 45-day-old juvenile (height: 20cm), survival rate was 70% under the water
level same as its height. There was significant interactive effect of water level and light intensity on the growth of juvenile (height: p<.001, dry weight: p<.01), and survival rate of juvenile was 10%
under +20cm-water level and 30%-light intensity condition. The following management plans for
invasion of S. gracilistyla are recommended from these results. (1) Dry condition should be maintained
at fringe of wetlands for about two weeks at seed dispersal and germination stage (early May∼mid
May). (2) Water level should be raised to about 5cm at fringe of wetlands for about two weeks at
seedling stage (mid May∼early June). (3) Water level should be raised to over 20cm at fringe of
wetlands for a long time at juvenile stage. Planting trees for shading can raise management
effectiveness (mid June∼). (4) As water level manipulating is performed as fast as possible for controlling seedling and juvenile, management become easier and more effective.
Language
Korean
URI
https://hdl.handle.net/10371/95808
DOI
https://doi.org/10.13087/kosert.2015.18.3.1
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College of Education (사범대학)Dept. of Science Education (과학교육과)Biology (생물전공)Journal Papers (저널논문_생물전공)
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