文献类型：期刊文献

英文题名：Enhancing large-diameter timber production: Evaluating poplars by genotype and spacing

作者：Liu, Ning[1,2,3] van den Bulcke, Jan[3] Van Acker, Joris[3] Liu, Fenfen[1,2] Gao, Chengcheng[1,2] Yu, Jinjin[1,2] Su, Xiaohua[1,2,4] Liu, Chenggong[1,2] Huang, Qinjun[1,2]

第一作者：Liu, Ning

通信作者：Liu, CG[1];Huang, QJ[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat State Forestry Ad, Beijing, Peoples R China;[3]Univ Ghent, Dept Environm, UGent Woodlab Lab Wood Technol, B-9000 Ghent, Belgium;[4]Nanjing Forestry Univ, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing, Peoples R China

年份：2025

卷号：223

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;EI(收录号：20244917475375);Scopus(收录号：2-s2.0-85210730418);WOS:【SCI-EXPANDED(收录号:WOS:001438171000001)】；

基金：This project was financially supported by the 'Fourteen Five-Year' National Key Research and Development Program of China (Grant No. 2021YFD2201200), project name: 'Research on precise and efficient cultivation technology of poplar large-diameter industrial resource materials.

语种：英文

外文关键词：Populus x euramericana; Spacing; Genotype selection; Large-diameter trees

摘要：To meet the increased demand for construction timber, selecting large-diameter hybrid poplar genotypes and optimizing spacing are essential for enhancing stand productivity in Northeast China. In the Daling River Plain, a trial with 12 clones (G1 similar to G12) of Populus x euramericana at four spacings (2 mx5 m, 3 mx8 m, 4 mx8 m, 4 mx10 m) was conducted. Over a 14-year rotation, tree height, diameter at breast height, survival rate, individual tree volume, growing stock, and timber yield were measured and analyzed. Results showed that while tree height was minimally affected, diameter at breast height, survival rate, and growing stock were significantly influenced by genotype and spacing. Higher spacings inhibited growth but increased variability within the stand. Diameter at breast height in the 2 mx5 m spacing reached the large-diameter standard (24 cm) and provided a higher growing stock. The minimum density required for larger-diameter wood (diameter at breast height over 35 cm) was the 4 mx8 m spacing. GGE-Biplots identified the top five genotypes as G2, G4, G11, G1, and G10. Genotypes G4, G10, and G1 were suitable for low-density plantations, with G4 performing best, achieving a 95 % improvement in survival rate and a 105 % increase in growing stock. Genotypes G2 and G11 were ideal for highdensity plantations, with G2 showing the best results, increasing survival rate by 36 % and growing stock by 56 %. The optimal period for early selection in P. x euramericana is the 4th to 5th year after afforestation. The best design, D1xG2, yielded 513 m(3)center dot ha(-1) of timber and 288.52 m(3)center dot ha(-1) of large-diameter wood. These findings support the establishment of large-diameter poplar plantations, aiding future breeding efforts and increasing stand productivity.