Effect of Resumption of Vegetation Ma Gement on the Restoration of Grassland Plants in the Forest Where the Grassland Ma Gement Was Ceased

27 Mar Effect of Resumption of Vegetation Ma Gement on the Restoration of Grassland Plants in the Forest Where the Grassland Ma Gement Was Ceased

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Abstract

English Abstract

In order to collect data on the restoration of the grassland plants, we resumed vegetation ma gement in a forest where grassland ma gement was ceased 30 years ago.We use three sets of ma gement techniques,“brush cutting after thinning”,“only thinning”and“control”. One 20 meter×10 meter plot was assigned to each set,and the height and diameter of plant stems in the plots were determined along with the vegetation and light factor in 2 meter square sub-plots. In brush cutting after thinning plot, grassland species appeared and their domi nce increased. In the only thinning plot too, several grassland plants appeared, but the domi nce of all plants decreased. On the other hand, these grassland plants did not occur in the control plot. The relative quantum flux density of photons crossed 20 % near the ground in the thinning and brush cutting plot. However in only thinning plot, this value was less than 10 %. These results showed that thinning and brush cutting were effective vegetation ma gement techniques to ensure the appearance of and the increase in grassland plants.