南方地区杨树胶合板材定向培育技术的研究

随着工业技术的发展，工业生产对木材和其它林产品提出了更高、更新的要求，要求各类用材实行定向培育，这是世界人工林发展出现的战略变化１）。杨树具有生长快、成材早、产量高和易于更新的特点，为最适的短轮伐期工业用材林经营树种（方升佐等，１９９３）。所谓定向培育，是指按最终用途所确定的对木材原料的要求，采用集约经营等科学管理措施，生产出种类、质量、规格都大致相同，价格具竞争力的大批木材原料。本文简要总结了南方地区杨树胶合板材定向培育技术中关于无性系选择、立地控制、密度控制、栽植材料选择及优化栽培模式等研究…

STUDIES ON DIRECTIVE SILVICULTURE OF POPLAR VENEER GLUED WOOD IN THE SOUTHERN REGION OF CHINA

Based on the results of more than ten year's scientific research and practice, some key techniques for cultivating poplar veneer glued wood were summarized systematically. The results were as follows: (1)Selecting appropriate poplar clones for various cultivation zones according to their growth rate and wood quality. (2)Choosing good sites being suitable for poplar clone growing (at least SI≥18m). (3)Adopting reasonable planting density which can produce more timbers to meet the need of plywood(the tree spacing should be more than 5m×5m). (4)Using correct planting methods for different soil conditions, however, large seedling with 2-year-old root and 1-year-old stem (seedling height>4m)were advocated. (5)Taking effective measures to tend the stand, the most effective measure was interplanting with crops. (6)Pruning was neccessary to produce non-node timber, but pruning method, pruning intensity and pruning season should be controlled properly. If the 6 measures mentioned above were carried out, the poplar forests with a high yield and high quality could be ensured. In order to provied some theoretical basis for cultivating poplar veneer glued wood, 4 optimum cultivation patterns were also established using the method of two dimensions system.