Forest growth cycle of mixed dipterocarp forests with special reference to the chages of forest stratifiction

特别关注森林分层变化的龙脑香混交林森林生长周期

• 批准号: 62043069
• 负责人: YAMAKURA Takuo
• 金额: $ 1.09万
• 依托单位: Osaka City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Overseas Scientific Research
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62043069/
• 关键词: Gap; Forest stratification; Mixed dipterocarp forest; Power law; Regeneration; べき乗則

This study deals with a forest growth cycle of a mixed dipterocarp forest or symbol of plant and animal kingdoms with rich species in South east Asea, with special reference to the changes of forest stratification with time and habitat gradients.The field research was made over a period of three months from December 1986 to March 1987 in the mixed dipterocarp forests at Bako-, Lambir-, and Bukit Mersing District, in Sarawak, East Malaysia, by establishing five to eight belt transects (200 m long and 20 m wide) on slopes in the study forests for the enumeration of living- and dead trees with mature size (over 30 cm in diameter at breast height), canopy gaps from dead trees, and small regenerated plants in gaps, and by making profile pits for soil studies.Tree fall patterns in three study areas were estimated from the records of dead trees, gaps, regenerated trees, and suggested an important role of soil fertility in the forest growth cycle, since fertile soil resulted in rapid tree growth, huge mature trees, large gaps, and shorter turn over time in forest growth cycle, ultimately. Forest stratification was analyzed by using the symmetric type difference diagram. Introducing a parameter(i) for identifying forest stories, mean tree height(Hi) and tree density(Pi) in a story were calculated. Hi and Pi satisfied the relation logHi=logK-hlogPi, where h & k are coefficients specific to a stand. If we fixed i, Hi increased linearly with an increase of the maximum tree height(Hmax) in the forest stand. This Hmax vs. Hi relation also suggested an important effect of soil fertility on forest stratification because Hmax represented a site quality index. From these results, the dynamic feature of forest growth cycle was estimated and integrated into the duality principle of the quasi-1/2 power law of tree height or Pi-Hi relation.

This study deals with a forest growth cycle of a mixed dipterocarp forest or symbol of plant and animal kingdoms with rich species in South east Asea, with special reference to the changes of forest stratification with time and habitat gradients.The field research was made over a period of three months from December 1986 to March 1987 in the mixed dipterocarp forests at Bako-, Lambir-, and Bukit Mersing District, in Sarawak, East Malaysia, by establishing在研究森林中的山坡上的五到八个皮带样区（200 m长，宽度为20 m），以枚举具有成熟大小的生物和死枯树（胸部高度的直径超过30 cm），枯树的冠层间隙，枯树中的小植物，以及在间隙中再生的小植物，以及为土壤研究的概况而成的特征。森林生长周期中的土壤肥力，因为肥沃的土壤最终导致了迅速的树木生长，巨大的成熟树木，较大的间隙以及森林生长周期的变化。使用对称类型差图分析了森林分层。计算了一个用于识别森林故事，平均树高（HI）和树木密度（PI）的参数（i）。 HI和PI满足了关系logHi = logk-hlogpi，其中H＆K是特定于支架的系数。如果我们固定I，HI随着森林支架中的最大树高（HMAX）的增加线性增加。这种HMAX与HI关系还提出了土壤生育对森林分层的重要影响，因为HMAX代表了现场质量指数。从这些结果中，估算了森林生长周期的动态特征，并将其整合到树高或Pi-Hi关系的准1/2功率定律的二元性原理中。