Study on the Growth Progress of Planted Trees on Man-made Slopes

Abstract

Tree growth progress was surveyed and investigated on the man-made slopes in Hukui Prefecture, on which deciduous and evergreen broad-leaved seedlings were planted densely about 15 years ago. This case of tree planting on man-made slopes was an early one in Japan. The surveys were carried out 5 times from 1976 to 1988. The results were obtained as follows;(1) the tree growth is generally progressing at a good pace.(2) while some deciduous trees are more dominant on overstory than evergreens, the forest structure, such as number of tree species or survival species, are different between deciduous species on overstory.(3) soil conditions are also developing steadily, the fact obtained from our measurement of the soil respiration rate.