Sự biến động kích thước một số tế bào gỗ Keo lá tràm (Acacia auriculiformis) theo hướng bán kính

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Tác giả: Văn Đoàn Dương, Linh Chi Hoàng, Tử Kim Nguyễn, Thị Thu Hà Trần

Ngôn ngữ: Vie

Ký hiệu phân loại: 674 Lumber processing, wood products, cork

Thông tin xuất bản: Nông nghiệp và Phát triển nông thôn, 2023

Mô tả vật lý: 80 - 86

Bộ sưu tập: Metadata

ID: 421590

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Tóm tắt
Chủ đề

Các tính chất vật lý và cơ học gỗ thường có mối liên hệ với các đặc điểm cấu tạo gỗ. Nghiên cứu này được thực hiện nhằm xác định sự biến động kích thước một số tế bào gỗ, khối lượng riêng của gỗ Keo lá tràm (Acacia auriculiformis) và mối quan hệ tương quan giữa chúng. Các đặc điểm cấu tạo gỗ gồm đường kính tế bào mạch gỗ, sợi gỗ và chiều dày vách tế bào sợi gỗ của 5 cây gỗ Keo lá tràm được kiểm tra tại các vị trí 25, 50, 75 và 100% chiều dài bán kính theo hướng từ tâm ra vỏ (mẫu gỗ thu thập tại vị trí 1,3 m tính từ mặt đất). Giá trị trung bình khối lượng riêng, đường kính mạch gỗ, sợi gỗ và chiều dày vách tế bào sợi gỗ lần lượt là 0,54 g/cm3, 87,82 µm, 8,18 µm và 1,19 µm. Theo hướng từ tâm ra vỏ đường kính mạch gỗ và chiều dày vách tế bào có xu hướng tăng dần, trong khi đó đường kính sợi gỗ có xu hướng giảm dần. Khối lượng riêng có tương quan âm rõ ràng (r = -0,82) với đường kính sợi gỗ, trong khi đó tương quan dương được tìm thấy giữa khối lượng riêng với đường kính mạch gỗ (r = 0,57) và chiều dày vách tế bào sợi gỗ (r = 0,55). Có sự khác biệt rõ ràng giá trị đường kính sợi gỗ và chiều dày vách tế bào sợi gỗ giữa các cây mẫu, điều này gợi ý rằng công tác chọn giống cây mẹ Keo lá tràm sẽ có thể ảnh hưởng đến tính chất gỗ sau này., Tóm tắt tiếng anh, The physical and mechanical wood properties have relation with anatomical properties. This research is to investigate the radial variation in cell morphology of Acacia auriculiformis. Vessel lumen diameter, fiber lumen diameter, and fiber cell wall thickness of 5 Acacia auriculiformis sample trees were experimentally investigated at 1.3 m height in different radial positions from pith (25, 50, 75 and 100% radial length). The overall mean values of wood density, vessel lumen diameter, fiber lumen diameter, and fiber cell wall thickness were 0.54 g/cm3, 87.82 µm, 8.18 µm, and 1.19 µm. Vessel lumen diameter and fiber cell wall thickness increased from pith to bark, while fiber lumen diameter decreased from the pith toward the bark. Wood density and fiber lumen diameter were strongly negative correlated (r = -0.82), while the medium positive correlations were found between wood density and vessel lumen diameter (r = 0.57) and between wood density and fiber cell wall thickness (r = 0.55). There was a significant difference in fiber lumen diameter and fiber cell wall thickness among sample trees. This suggests that tree breeding program of mother tree may be effect on wood properties of Acacia auriculiformis.

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Sự biến động kích th­ước một số tế bào gỗ Keo lá tràm (Acacia auriculiformis) theo h­ướng bán kính

Sự biến động kích thước một số tế bào gỗ Keo lá tràm (Acacia auriculiformis) theo hướng bán kính