The density effect of mother trees on the fruit bearing and dispersal of the beech (Fagus crenata Blume) forests after selective cutting
1993
Hirota, J. (Niigata Univ. (Japan). Faculty of Agriculture) | Kamitani, T.
The density effect of mother trees on the fruit bearing and dispersal in natural beech (Fagus crenata Blume) stands after selective cutting in Kamikawa, Niigata Prefecture, Central Japan was studied. Four experimental plots whose densities of mother trees differed from each other were selected in the stands. The sizes and distributions of the reserved mother trees were not uniform. The selective cutting always did not produce good effects on stimulating the fruiting of the mother trees. The densities of fallen nuts, which were estimated by twenty 1 centiare seed traps, varied greatly on each plot; 437 nuts/centiare (147 trees/ha), 345 nuts/centiare (53 trees/ha), 302 nuts/centiare (104 trees/ha) and 53 nuts/centiare (21 trees/ha). The coefficient of variance of the total fallen nuts were very large on the plot where the number of fallen full nuts were less than 10 per centiare at many seed traps. On the other hand, there were no significant differences in the proportions of full nuts of the total fallen nuts among the plots; 60.9-68.7%. The density of mother trees did not affect the quality, but did affect the quantity. It was obvious that more than 50 mother trees/ha were needed for successful regeneration
Показать больше [+] Меньше [-]