2015 Volume 40 Issue 4 Pages 547-554
Twenty years ago, broadleaved trees at different seral stages were planted using the so-called “natural planting ” technique in order to restore a broadleaved forest on a slope at the Akandana Parking Area. The following six species were planted on the slope: Taxus cuspidata, Betula platyphylla var. japonica, Betula ermanii, Weigela hortensis, Sorbus commixta, and Quercus crispula. Seed sowing was also used on another slope. For this slope, the seeds of the following seven species were sown: Amorpha fruticosa, Torreya nucifera, Lespedeza cuneata., Alnus hirsute Turcz. var. sibirica, Dactylis glomerata, Phleum pretense, Artemisia princeps. The purpose of this study was to understand the differences in the community structure between the two slopes. We established four plots on each slope and investigated from 2012 to 2013. Clear differences were found in the vertical stratification between the two slopes: several layers, i.e. tree layer, subtree layer, and shrub layer, were detected on the “ natural planting method ” slope, but mostly mono layer, i.e. tree layer, was detected on the “ sowing method ” slope. In addition, a difference was found with respect to seedlings: there were 1,606 seedlings on the “ natural planting ” slope, but only 30 seedlings on the other slope. Furthermore, all the sown species, except Alnus japonica, disappeared from the sowing slope. On the basis of these results, we concluded that planting different types of trees will maintain a developed forest, in community structure and seedlings, comparing with seed sowing.