Nghiên cứu tuyển chọn cây trội căm xe (Xylia xylocarpa (Roxb.) Taub.) tại một số tỉnh Nam Trung bộ và Tây Nguyên=Research on selection of plus trees of xylia xylocarpa (roxb.) taub.) in south central and central highlands provinces

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Tác giả: Thị Xuân Phấn Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Nông nghiệp và Phát triển nông thôn, 2024

Mô tả vật lý: tr.80-92

Bộ sưu tập: Báo, Tạp chí

ID: 475972

Thêm vào giỏ

Cây Căm xe là loài cây gỗ quý hiếm, gỗ cứng, chắc, có giác lõi phân biệt, giác màu trắng vàng nhạt, dày, lõi màu đỏ thẫm hơi có vân, rất mịn, nặng. Nghiên cứu tuyển chọn cây trội Căm xe được thực hiện năm 2023, nhằm chọn lọc được cây trội Căm xe có năng suất, chất lượng thân cây tốt phục vụ trồng rừng gỗ lớn tại các tỉnh vùng Nam Trung bộ và Tây Nguyên. Kết quả điều tra tuyển chọn tại 5 tỉnh đã chọn được 118 cây trội Căm xe chính thức từ 144 cây trội dự tuyển, trong đó: Xuất xứ ở tỉnh Gia Lai 16 cây, tỉnh Đắk Lắk 20 cây, tỉnh Ninh Thuận 30 cây, tỉnh Bình Thuận 26 cây và tỉnh Khánh Hòa 26 cây. Các cây trội được chọn lọc ở 5 tỉnh đều có sinh trưởng, phát triển tốt, với đường kính ngang ngực (D1,3) dao động từ 23,6 - 52,5 cm, chiều cao từ 17,0 - 25,5 m, chiều cao dưới cành lớn đạt từ 12,0 - 19,0 m, chiếm từ 53,3 - 83,3% so với chiều cao vút ngọn, đường kính tán từ 5,5 - 9,6 m. Các cây trội có tổng điểm chất lượng thân cây đều đạt tương đối cao, từ 13 - 15 điểm/cây. Các cây trội Căm xe được theo dõi vật hậu, thu hái hạt giống để cung cấp nguồn hạt giống có năng suất, chất lượng được cải thiện góp phần khai thác và phát triển nguồn gen loài thực vật quý hiếm có giá trị tại các tỉnh vùng Nam Trung bộ và Tây Nguyên.Xylia xylocarpa (Roxb.) Taub. is a rare and precious tree species, with hard, strong wood, distinct sapwood and heartwood, light yellowish - white sapwood, thick, dark red heartwood with slightly grained, very smooth, heavy. The research on selecting superior Xylia xylocarpa trees was conducted in 2023, aiming to select superior Xylia xylocarpa trees with good productivity and trunk quality to serve large timber plantations in the provinces of the South Central and Central Highlands regions. The results of the selection survey in 5 provinces have officially selected 118 superior Xylia xylocarpa trees from 144 selected trees, of which: 16 trees originated from Gia Lai province, 20 trees from Dak Lak province, 30 trees from Ninh Thuan province, 26 trees from Binh Thuan province and 26 trees from Khanh Hoa province. The selected superior trees in the 5 provinces all grew and developed well, with diameter at breast height (D1.3) ranging from 23.6 – 52.5 cm, height from 17.0 – 25.5 m, height below the large branches, reaching from 12.0 – 19.0 m, accounting for 53.3 – 83.3% of the height at the top, canopy diameter from 5.5 – 9.6 m. The superior trees had a relatively high total trunk quality score, from 13 - 15 points/tree. The superior Xylia xylocarpa trees were monitored for reproductive cycle and collected for seeds to provide a source of seeds with improved yield and quality, contributing to the exploitation and development of valuable rare plant gene sources in the provinces of the South Central and Central Highlands regions.

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