Application Study on Forest Management System and Silvicultural Process for High Quality Timber Production of Japanese Oak

日本橡树优质木材生产的森林经营体系和造林工艺应用研究

• 批准号: 12460071
• 负责人: IMADA Morio
• 金额: $ 3.46万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12460071/
• 关键词: Japanese Oak; High quality timber production; Silvicultural system; Forest management system; Clear-cutting system; Rotation

In April 1972, an experimental management system for Japanese oak (Quercus mongolica var. grosseserrata) was established in a natural Japanese oak forest, approximately 200 ha in area, in the Kyushu University Forest in Hokkaido. The management system was imposed by dear-cutting system in tongue-shaped blocks surrounded by shelterbelts. Rotations were 150 years and cutting blocks for staggered annual cutting were set up. The natural stands containing these blocks have been managed by a silvicultural process designed to produce high-quality timber from Japanese oak. The results obtained for 30 years between 1972 and 2001 (the first, second and third periods) are follows;.1) The number of first-year oak seedlings established by regeneration process per ha varied widely-from 5,000 (in 2001) to 133,000 (in 1974); it averaged 55,500. Such variation was due to noted variations in size of seed crop for natural forests of Japanese oak. 2) When the stands established by the regeneration process … More developed into near the 15-year-old stand, vertical stratifications were distinguished in the canopy on the same manner as the above established stands. 3) In the 15- to 22- year-old stand, the height of the upper oak trees seemed to be somewhat lower than the one of the upper trees progressing with wide variations. 4) In the established stands by the regeneration process from 15- through 29-year-old, whereas the DBH of the upper trees was varied between the 15- and 21-year-old stand, the diameter growth was nearly constant (approximately 5 mm per year) in the 21- through 29-year-old stands. 5) In the 35- to 57-yearold stand, the stand volume of the upper trees seemed to increase with an increase in stand age progressing with wide variations. 6) The average net annual revenue for the 30-year period was 335,000 yen, an amount calculated by subtracting the average cost per year (557,000 yen) from the average revenue per year (892,000 yen).Investigating the profitability of this applied management system and improving its shortcomings will require that the experiment be continued over a long period. Less

1972年4月，在日本栎（Quercus mongolica var. grosseserrata）建立在北海道的九州大学森林中的天然日本橡树林中，面积约200公顷。在防护林围成的舌形块内实行割除制管理。轮伐期为150年，并设置了交错年伐的伐区。包含这些块的天然林分通过造林过程进行管理，旨在从日本橡木中生产高质量的木材。从1972年到2001年的30年（第一、二、三阶段）的结果如下：1）每公顷通过更新过程建立的第一年橡树幼苗的数量变化很大-从5，000（2001年）到133，000（1974年）;平均为55，500。这种变化是由于日本橡树天然林种子作物的大小变化。2)当通过再生过程建立的林分 ...更多信息 发育到15年生林分附近时，冠层中的垂直分层与上述已建立的林分相同。3)在15 ~ 22年生林分中，上部橡树的高度似乎略低于上部树的高度，且变化较大。4)在15- 29岁的更新过程中建立的立场，而上层树木的胸径是不同的15和21岁之间的立场，直径生长几乎是恒定的（约5毫米每年）在21- 29岁的立场。5)在35- 57年生林分中，上层树木的蓄积量似乎随着林龄的增加而增加，但变化很大。6)30年的平均年净收入为33.5万日元，这是从平均年收入（89.2万日元）中减去平均年成本（55.7万日元）后的结果。为了研究这种应用管理系统的收益性，并改善其不足之处，需要长期进行试验。少