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.

1986年12月至1987年3月，在马来西亚巴科、兰比尔和武吉默辛地区的龙脑香混交林中，对龙脑香混交林的生长周期进行了研究，并对森林层化随时间和生境梯度的变化进行了讨论。在马来西亚东部的沙捞越，通过建立五到八个样带，（200米长，20米宽），用于计算具有成熟尺寸的活树和死树（胸高直径超过30厘米）、枯死树木的林隙和林隙中的小再生植物，通过对3个研究区的死木、林窗和再生木的记录，估算了树木的倒伐格局，并提出了土壤肥力在森林生长周期中的重要作用，因为肥沃的土壤导致树木生长迅速，成熟树巨大，林隙大，森林生长周期周转时间短，最终。利用对称型差图对森林分层进行了分析。引入识别森林层的参数（i），计算了层内的平均树高（Hi）和树木密度（Pi）。Hi和Pi满足logHi=logK-hlogPi关系，其中h和k是林分特有的系数，当i固定时，Hi随林分最大树高（Hmax）的增加而线性增加，Hmax与Hi的关系也表明土壤肥力对森林分层的重要影响，因为Hmax代表了一个立地质量指标。根据这些结果，估计了森林生长周期的动态特征，并将其纳入树高准1/2幂律或Pi-Hi关系的对偶原理中。