Abstract
In March 2006, five species of seedlings (Pinus densiflora, Styrax japonica, Celtis sinensis, Machilus thunbergii, and Eurya japonica) were planted at an abandoned site after clear felling in Kuma Village, Kumamoto Pref. We compared growth characteristics of five species between fertile valley sites and acidic and infertile slope sites. Growths of Pinus densiflora, Machilus thunbergii and Eurya japonica were no difference between valley and slope sites. By contrast, growths of Styrax japonica and Celtis sinensis planted on slope site were suppressed their growths. Styrax japonica and Celtis sinensis planted on slope site showed low concentrations of nitrogen, phosphorus, and calcium in leaves, and these deficiencies considered as suppression of their growth. Stomatal conductance of each species showed no significantly difference between valley and slope sites; therefore, drought stress did not concern with suppression of their growth.
