Abstract:
Based on a field survey of natural regeneration condition in Hainan
Casuarina equisetifolia L. coastal protection forest, single objective evaluation methods, respectively taking regeneration quantity, regeneration distribution range and regeneration structure as an evaluation index, and entropy weight comprehensive evaluation method were adopted to evaluate and sort the natural regeneration performance of different tree species under
Casuarina equisetifolia forests. Based on the evaluation result, the tree species suitable for natural regeneration under the
Casuarina equisetifolia forests were selected. Results showed that tree species with good regeneration ability were
Litsea glutinosa (Lour.) C. B. Rob.,
Acacia auriculiformis A. Cunn. ex Benth,
Melia azedarace L.,
Streblus asper Lour. The small trees are
Brucea javanica (L.) Merr.,
Pandanus tectorius Sol.,
Polyalthia suberosa (Roxb.) Thw. Shrubs are
Atalantia buxifolia (Poir.) Oliv.,
Murraya koenigii (L.) Spreng.,
Flacourtia indica (Burm. F.) Merr., and
Carmona microphylla (lam.) G. Don. Species with certain regeneration potential included tree species
Terminalia catappa L., and
Calophyllum inophyllum L.; small trees
Mallotus philippensis (Lam.) Muell. Arg. and
Premna octonervia Merr. et Metc., and shrubs
Clerodendrum inerme (L.) Gaertn. and
Psychotria rubra (Lour.) Poir. Small trees and shrubs were the associated species of the coastal protection forests; therefore, proper conservation and planting of these associated tree species should improve species diversity and hierarchy of
Casuarina equisetifolia forests. The mixed planting of tree species selected with good natural regeneration in
Casuarina equisetifolia forests could help realize the transformation from artificial forest to “near natural” forest.