Classifying plantation forests in a snowy region according to cutting age using GIS : A case study of private forests in Sanpoku Town, Niigata Prefecture.
Classifying plantation forests in a snowy region according to cutting age using GIS : A case study of private forests in Sanpoku Town, Niigata Prefecture.
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使用 GIS 根据采伐年龄对雪地人工林进行分类：以新泻县三北镇的私人森林为例。
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
Takeo Dobashi
中科院分区：
文献类型：
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作者：
S. Tatsuhara;Takeo Dobashi
在制定分区或采伐计划之前，必须对林木进行评估。本文以新泻县三浦库县的私人森林为例，利用地理信息系统(GIS)对雪域私人林中经管理的杉木人工林的净收入进行了评估，并根据采伐的可能性对人工林进行了分类。该镇包括卢沿海、安西山区和内陆地区，积雪深度差异很大，假设有两个转运点：一个木材市场和一个当地的木材相关综合体。首先根据立地质量预测原木产量，利用已有的林分密度管理图和高度生长曲线，根据原木长度和胸径等级计算原木蓄积量，根据原木价格和根据立地质量预测的原木产量估算总蓄积量，然后按生产力、所需工作量和工资四个因素，按标准生产力、所需工作量和工资四个因素，估算出三种原木的总成本，包括距离、最深积雪深度和坡度，人工林经营成本包括建立新人工林的更新成本和最终采伐的打捆成本。对短伐、中伐和冷伐三种采伐年限的林木纯收入进行了估算。最后，根据收成的概率对Sugi种植园进行分类，并在目前价格高出10%和低出10%的假设下，利用地理信息系统(GIS)计算出每一棵树的面积。立地质量是杉木人工林经营管理中更重要的因素，比堆积距离和最深积雪更重要。新泻木材市场上的价格比现在的价格低10%，这是维持私人森林中弗雷姆·舒吉种植园木材生产的最低要求，考虑到目前的成本和成本：伐木年龄、净收入、立地质量、积雪深度、糖分、堆积距离
Forest stands must be evaluated before making zoning or harvest plans. 'lhis paper evaluated the net income of managed sugi Uapanese cedag ClyPtomeria 1'mponica D. DoN) plantations in private forests in a snowy region and classfied sugi plantations according to the prebability of harvesting, using a geographic information system (GIS), in a case study of private forests in Sanpoku Tewn, Niigata Prefecture. The town includes both lew coastal anci mountainous inland areas and the snow depth varies markedly Two transfer points were assumed: a timber market and a local wood-related complex. First, log production was predicted according to site quality, using an existing stand density management diagram, as well as height growth cttrves to ebtain log volumes according te log length and tep diameter class, Gross inceme was estimated from log prices and the predicted log production accerding to site quality Then, the total cost from planting threugh te logging was estimated for standard cenditiens of productivity, necessary workfbrce and wages, using four factors/ site quality} yarding distance, the deepest snow depth and slope angle, The cost of plantation forest management included the regeneration cost for establishing new plantations and the legging cost for final cutting. Forest net income was evaluated fer three cutting ages: short, intermediate and leng rotation. Finally, sugi plantations were classhied accerding to the probability of harvest and the area of each c]ass was obtained using GIS on the assumptien ef present, 10% higher and 10% Iower ]og prices. Site quality was the more impertant factor in sugi plantation management; it was more important than yarding distance or the deepest snow depth. Prices 10% lower than present prices on the Niigata Timber Market were the minimum neces$ary te maintain timber productien frem sugi plantations in private forests, given present costs and $ubsidies, Kbywonts: cutting age, net income, site quality,snow depth,sugi, yarding distance