The Changes of Understory Vegetation by Partial Cutting in a Silvopastoral Practiced Natural Deciduous Stand

초록

Recognizing the importance of the multi-purpose management of natural deciduous forest, thisstudy was carried out to implement the partial cutting for stand regulation to examine agroforestry practiceas well as other concurrent forest resource production, and to investigate the changes in stand characteristicsand understory vegetation in a silvopasture practiced natural deciduous stand in the Research Forest ofwere performed in the unmanaged natural deciduous stand in order to improve the growing condition,especially light condition, for introducing some comercial herbaceous plants on the forest floor toestablish agroforestry and/or silvopastoral system. Dominated by Quercus varibilis Blume (50.5%) andQuercus dentata Thum. ex Murray (42.6%), eight tree species were composed of the study forest, includingpoles of Pinus desiflora Siebold & Zucc and sapling of Pinus Koraiensis (13 tree species, 12 shrub species, 58 herbaceous species, and 4 wody climbers) vascular plant specieswere observed in study site after partial cutting treatments, while that of before partial cutting was 53species (14 tree species, 8 shrubs species, 30 herbaceous species, and 1 woody climbers). The proportionof life form spectra in plot B was Mi (28.4%)-Na (23.0%)-Ge (17.5%)-Ch (10.8%)-He (9.5%)-MM (6.7%)-Th (4.1%). No statistically significant diferences were observed in changes of life form spectra fromscratching for forage sowing made plants invade easily on the forest floor, and light partial cuting (LPC)plot (500 stems/ha) had much higher number of undersory species than those of heavy partial cutting (HPC)plot (310 stems/ha) and control plot (1,270 stems/ha).

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