Cấu trúc theo chiều thẳng đứng của một số kiểu thảm thực vật thoái hóa ở thành phố Cẩm Phả, tỉnh Quảng Ninh

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Tác giả: Thế Hưng Nguyễn, Thị Thanh Hương Vũ

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học Đại học Hạ Long, 2022

Mô tả vật lý: tr.69

Bộ sưu tập: Metadata

ID: 337267

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Hiện nay, ở thành phố Cẩm Phả, tỉnh Quảng Ninh có nhiều kiểu thảm thực vật có mức độ thoái hóa cao. Việc nghiên cứu cấu trúc thảm thực vật có ý nghĩa quan trọng trong việc xây dựng kế hoạch khai thác, sử dụng hợp lý và đề xuất giải pháp phục hồi rừng. Nghiên cứu này sử dụng phương pháp điều tra theo tuyến để điều tra thành phần loài, thu thập các mẫu vật cần thiết và chọn vị trí đặt ô tiêu chuẩn để điều tra thành phần cây gỗ. Trong mỗi ô tiêu chuẩn, lại đặt các ô dạng bản để điều tra cây gỗ tái sinh, cây bụi, thảm tươi. Việc xác định thành phần loài thực vật chủ yếu được dựa theo các khóa phân loại thực vật theo hình thái, cấu tạo. Kết quả nghiên cứu cho thấy: Thảm thực vật rừng IIA có độ che phủ chung 70% và có cấu trúc bốn tầng
Thảm thực vật IC có độ che phủ chung đạt tới 60%, với cấu trúc ba tầng
Thảm thực vật IA có độ che phủ chung khoảng 40%, có cấu trúc hai tầng. Các kiểu thảm thực vật không chỉ khác nhau về chỉ tiêu cấu trúc không gian (độ che phủ, số tầng tán, chiều cao tầng tán, cấu trúc tầng tán), mà còn có sự khác nhau rất lớn về thành phần loài và tỉ lệ các loài thực vật.In Cam Pha city of Quang Ninh province, there are many types of vegetation with a high degree of degradation. Studying vegetation structure plays an important role in formulating a plan for rational exploitation and use and proposing solutions for forest restoration. This study used the linear survey method to investigate the species composition, collect the necessary specimens and select the location of the standard plots to investigate the tree composition. In each standard plot, a panel plot was placed to investigate regenerated trees, shrubs, and fresh carpets. The determination of plant species composition is mainly based on the keys to classify plants according to morphology and structure. Research results show that: IIA forest vegetation has a general cover of 70% and has a 4-storey structure. IC vegetation has an overall coverage of up to 60%, with a 3-storey structure. Vegetation IA has a general cover of about 40%, and has a 2-storey structure. The vegetation types not only differ in spatial structure (coverage, number of canopy layers, canopy height, canopy structure) but also have a huge difference in species composition and the ratio of plant species.

1. Đọc trực tuyến

1. Đọc trực tuyến

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