Đặc điểm cấu trúc và tái sinh tự nhiên của một số kiểu thảm thực vật thứ sinh tại xã Hoàng Tung, huyện Hòa An, tỉnh Cao Bằng

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Tác giả: Thị Thu Trang Bùi, Hồng Sơn Đoàn, Ngọc Công Lê

Ngôn ngữ: vie

Ký hiệu phân loại: 634.95 Silviculture

Thông tin xuất bản: Khoa học và Công nghệ (Đại học Thái Nguyên), 2018

Mô tả vật lý: 153-158

Bộ sưu tập: Metadata

ID: 491299

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Chủ đề

Đặc điểm cấu trúc và tái sinh tự nhiên của một số kiểu thảm thực vật thứ sinh tại xã Hoàng Tung, huyện Hòa An, tỉnh Cao Bằng. Kết quả cho thấy các thảm thực vật thứ sinh ở xã Hoàng Tung có cấu trúc thành phần loài, thành phần dạng sống thực vật khá phong phú và đa dạng. Trong đó, rừng thứ sinh có số loài nhiều nhất, sau đó là thảm cây bụi và thấp nhất là thảm cỏ. Cả ba kiểu thảm thực vật đều có 5 dạng sống chính, trong đó nhóm cây chồi trên đất chiếm ưu thế với tỷ lệ từ 61,69-67,58% và thấp nhất là nhóm cây chồi ẩn 2,17-4,98%. Tỷ lệ cây gỗ tái sinh từ hạt khá cao (76,24 - 79,49%.) và tỷ lệ cây gỗ tái sinh có chất lượng tốt (54,89% - 64,46%).The species composition and plant component life forms in secondary (vegetation, shrubby vegetation and the secondary forests) are abundant and diverse in Hoang Tung commune, Hoa An district, Cao bang province. In which, the number of species in the secondary forests is highest, at 330 species, followed by that of shrubby vegetation which accounted for 201 species. The lowest is vegetation with 46 species. All three different vegetations have five groups of life forms. While the percentage of tree group which has shoots on the ground accounts for between 61.69% and 67.58%, the figure for latent tree group takes up only from 2.17% to 4.98%. Secondary forests have 2 to 4 segment. The quantities of species composition and density in the secondary forests stand on the top of the list and make up (24 species, 4496 trees/ha), followed by those of shrubby with 17 species, 3658 trees/ha. The number of regenerating trees increases in small height levels (level I and level II) but that falls in greater height levels in two different vegetation types. Shrubby vegetation is grove, the secondary forests is random according to the horizontal flat. The proportions of regenerating trees are sizble and fluctuate from 76.24% to 79.49%.

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