The traits of natural regeneration of Amentotaxus argotaenia (Hance) Pilger forest in Moc Chau district, Son La province

Abstract

Amentotaxus argotaenia (Hance) Pilger belongs to the Taxaceace family, which is one of the indigenous tree species naturally distributed in the Northwest and usually grows in high mountains, as well as the evergreen broad - leaved and limestone forest. In Vietnam, this species also was naturally found in Son La, Thanh Hoa, Thai Nguyen, Tuyen Quang, Vinh Phuc, Phu Tho, Lao Cai, Cao Bang provinces, etc (Nguyen Đuc To Luu, Philip Ian Thomas, 2004). We studied the natural regeneration forest where Amentotaxus argotaenia (Hance) Pilger distributed in Moc Chau district. The results revealed that the
naturel composition of seedling and sapling regeneration in the study area is very diversity, with some dominant species such as Castanopsis fissa Rehd.et Will, Castanopsis indian A.DC, Polyathia cerasoides Benth et Hook, Schima wallichii Choisy, Cinnamomum iners Reinw. Ex Blume, and Castanopsis tonkinensis Seem., Amentotaxus argotaenia (Hance) Pilger mainly occurs in the elevation from 1,300 to 1,600m and but in over 1,600m with only small munber found. The density of regenerated trees in the study area ranged from 2,250 to 3,917 trees/ha, of which the density of regenerated Amentotaxus argotaenia (Hance) Pilger was only ranged from 83 to 250 trees/ha. In the total of regenerated trees the trees with good quality were from 1,083 to 1,750 trees/ha, accounting for 36.10% to 48.14%, average trees with 750 - 1,333
trees/ha, accounting for 28.56% to 44.43%, trees with bad quality. The number of trees from 250 to 667 trees/ha accounts for 10.72 to 19.43%. For the original regenetation, there were 81.37% regenated trees from natural seeds and 18.63% from coppices.