文献类型：期刊文献

英文题名：The Impact of Spacing and Genotype on Growth and Harvest in a 14-Year Populus× Canadensis Plantation in Northeast China

作者：Liu, Ning[1,2,3] Van den Bulcke, Jan[3] Van Acker, Joris[3] De Ligne, Liselotte[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

机构：[1] Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China; [2] Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, China; [3] UGent-Woodlab [Laboratory of Wood Technology], Department of Environment, Ghent University, Ghent, 9000, Belgium; [4] Co ‐ Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240253478)

语种：英文

外文关键词：Forecasting - Forestry

摘要：There is a lack of industry standards for large-diameter poplar plantations of oriented cultivation in temperate regions of China. In this work, we studied tree morphology, growth patterns and harvest time in Populus × canadensis plantations at four spacings (D1, 1000; D2, 416; D3, 312; and D4, 250 trees per hectare) and five genotypes (G1, G2, G4, G10, and G11). We analysed the height-diameter ratio, taper, DBH increment, and volume increment of poplars. Logistic models were used to simulate and predict the quantitative maturity age and the period of fast growth of each genotype. The results showed that with an increase in spacing, there is a corresponding increase in height-to-diameter ratio(HDR) and a decrease in taper. The HDR of D1 and D2 stands was significantly higher than that of D3 and D4 stands, whereas the taper were lower for closer stands. The annual DBH increment of G4, G2, and G1 showed better results compared to G10 and G11. The rate of DBH growth in stands with low density was higher. The Periodic Annual Increment (PAI) and Mean Annual Increment (MAI) of the volume increased proportionally with the increase in stand age and were still in the phase of rapid growth at the 14th year. We found that the spacing and genotype of poplar plantations had a direct impact on DBH growth, volume growth, and quantitative maturity time. High-density spacing can promote the optimization of tree shape and increase wood production while also reducing the growth rate of DBH and the rapid growth of the stand. Genotypes responded differently to spacing, but none reached quantitative maturity within the 14-year rotation period. The prediction results showed that the quantitative maturity range ranged from the 15th to the 19th year. Therefore, it is important to use management strategies based on specific genotypes and planting spacing in order to enhance the development and productivity of poplar plantations. The most optimal design in this study was D1×G2, which reached quantitative maturity age in the 15th year and had a growing stock of 34 cubic meters per hectare. This study shows the effects of spacing and genotype on Populus × canadensis plantations and offers a scientific basis for the management of large-diameter poplar plantations. ? 2024, The Authors. All rights reserved.