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

瓦济马-胡格什地区多层林分采伐管理研究

基本信息

批准号：
03454076
负责人：
KITAO Kuninobu
金额：
$ 2.75万
依托单位：
SHIMANE UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

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.

本文以大叶崖柏（Thujopsis dolabrata var.位于石川县的诺托。通过调查和分析，研究了该地区的多层林分结构、择伐林经营、森林光照条件、表层土壤侵蚀、下垫面土壤化学性质、经济社会地域结构等方面的问题，主要结果如下：1.下列组合对数正态分布函数g（W），g（W）=<@D71（/）N@> D 7 SIGMA <@D6K（/）k=1@> D 6 N <@D2k@>D2<@D71（/）<@D82pi@> D8 sigma <@D2k@>D2W@> D 7 exp [-<@D7（logW-mu<@D2k@>D2）<@D12@>D1（/）2sigma<@D32（/）k@>D3@> D 7]建立多层林分模型，在假定林分直径或树高的频率分布由多个年龄级组成的前提下，对林分的直径和树高的频率分布进行了拟合。但若不进行择伐，其形状将变为正态分布。虽然Ate的再生因其高度的耐光性而倾向于在黑暗条件下进行，但通过良好的选择，在操作中可以促进幼苗的生长。如果选择不好，选择林将向均匀林转变。3.台风对Ate林的危害类型主要是连根拔起和断干。受害范围几乎遍及树径和树高。受害树的干形系数和折断高度均小于雪害树。