Đặc điểm hình thái và phân bố loài dó bà nà (Aquilaria banaensae phamh.) tại khu bảo tồn Sao La, tỉnh Thừa Thiên Huế

Abstract

This research aimed to investigate the morphological characteristics and ecological distribution of Aquilaria banaensae Phamh, Sao La Nature Reserve, Thua Thien Hue province. The findings showed that the leaves of A. banaensae have an inverted or lanceolate shape, the upper surface of the leaf is dark green, the lower surface is gray-green, the average leaf area is 57.0 ± 15.8 cm², the average stomata density is 144.5 ± 34.8 stomata/mm². Aquilaria banaensae is distributed mainly at an elevation of 800 - 950 m, from rich forest to medium forest, mainly at the slopes and peaks. There were 6 per 7 baseline surveys appearing A. banaensae, the frequency of occurrence of A. banaensae is relatively low with accounting for 28.8% (32/111 plots). This plant species had a spreading distribution and showed that the habitats of the species are stable (A/F > 0.05). The density of A. banaensae in the survey areas was 79.7 trees/ha. Trees with D₀₀ ≥ 1.8 cm (~D_1.3 ≥ 1 cm) started flowering (approximately 2.8% of the total number of investigated plants). A. banaensae mainly regenerated from seeds (around 93.8%). The important value index (IVI) is at the eighth position among the identified tree species.