皆伐跡地における植生回復にともなう地上部現存量の変化

The change of the standing crops of dry matter of vegetation was studied at two sites in the clear cutting areas in Sanbe Forest of Shimane University. The standing crops of total vegetation by regeneration increased with the lapse of time. The amount of trees began to increase at second year after cutting, and that at sixth year attained to 7-10 times as much as before cutting. The standing crops of herbaceous plant was maximum at first year after cutting in the lower part of slope. Those decreased with the passage of years. The rate of the standing crops of herbaceous plant to total vegtation decreased from the lower part to the upper part of slope. The rate of woody plant showed the inverse tendency. The standing crops of sprout increased with the lapse of time after cutting, and the rate of sprout to total above ground biomass in clear cutting areas also increased. The rate of sprout was larger in the upper part of slope because the reproductive power from a stool was high in the upper part of slope.