A STUDY ON THE MULTI-STORIED STANDS MANAGEMENT, ATE SELECTIVE CUTTING FORESTRY, IN WAZIMA-HUGESHI REGION

本文对石川县北东的ATE-Forest （Thujopsis dolabrata var. HONDAI）进行了综合研究。调查考察了林分结构、选择性采伐经营、森林光照条件、表层土壤侵蚀、下垫土化学特征和经济社会区域结构。研究结果如下：1.研究结果表明：在假设多层林分直径或高度频率分布由多个ageclass分布组成的情况下，推导出以下对数正态分布组合函数g(W), g(W)=<@D71(/)N@>D7SIGMA<@D6K(/)k=1@>D6N<@D2k@>D2< @D82pi@>D8sigma<@D2k@>D2W@>D7exp[-<@D7(logW-mu<@D2k@>D2)<@D12@>D1(/)2sigma<@D32(/)k@>D3@>D7]对多层林分进行建模。中选林直径和树高的频率分布呈扭曲j型。但如果不进行选择性切削，则形状会向正态分布转变。由于耐光性强，在黑暗条件下可进行再生，但通过选井操作可促进幼苗生长。如果选择不好，选择林就会变成均匀林。台风对森林的破坏类型主要为连根拔起和断茎。损害范围几乎扩展到树径和树高范围。受损树木的茎形系数和断高均小于雪害树木。

We studied synthetically on the ATE-Forest (Thujopsis dolabrata var. HONDAI) in Noto, Ishikawa Prefecture. We surveyed and examined the multi-storied stand structure, selective cutting forest management, light condition of forests, surface soil erosion, chemical charactor of the underlying soil, and economic and social regional structure.Some of the results are as follow :1.The following combined lognormal distribution function g(W), g(W)=<@D71(/)N@>D7SIGMA<@D6K(/)k=1@>D6N<@D2k@>D2<@D71(/)<@D82pi@>D8sigma<@D2k@>D2W@>D7exp[-<@D7(logW-mu<@D2k@>D2)<@D12@>D1(/)2sigma<@D32(/)k@>D3@>D7] was derived to model multi-storied stands, under the assumption that the diameter or height frequency distribution in multi-storied stands are composed of several ageclass distribution.2.The frequency distribution of diameter and tree height in ate selection forests showed the twisted J-shape type. But the shape should change to normal distribution unless selective cutting was performed well. Though the regeneration of Ate is intended in dark condition because of high light tolerance, the growth of seedlings are advanced in operating by well selection. If the selection was not well performed, the selection forests would change to the uniform forests.3.The damage types by typhoon in Ate forests were uprooting and stem broken. The damages extended to the almost range of diameter and tree height. The stem-form coefficient and broken height of damaged trees were smaller than those of snow damaged trees.