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首页> 外文期刊>Lesnicky casopis >Assessment of load and quality of logging residues from clear-felling areas in J?¤rvselja: a case study from Southeast Estonia
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Assessment of load and quality of logging residues from clear-felling areas in J?¤rvselja: a case study from Southeast Estonia

机译：从J的清晰砍伐区域评估伐木残留量的载荷和质量评估：来自东南爱沙尼亚的案例研究

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摘要

The properties of biomass-based fuel and combustion tests showed that logging residues are promising renewable energy sources. The data used in this study were collected from four clear-felling areas in J?¤rvselja Training and Experimental Forest Centre, Southeast Estonia in 2013a??2014. Logging was carried out by harvesters in Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies [L.] Karst.), silver birch (Betula pendula Roth.) and black alder (Alnus glutinosa L. Gaertn.) dominated stands with a small admixture of other tree species according to the cut-to-length method and logging residues were placed in heaps. The aim of this research is to assess different characteristics of logging residues (quantity, moisture content, energetic potential, ash content and amount) in clear-felling areas. The highest load of slash was measured on the birch dominated study site, where the dry weight of the logging residues was 29 t haa??1. Only the branch fraction moisture content on the black alder dominated site (35.4%) was clearly different from respective values on other sites (21.6a??25.4%). The highest calorific value of the residues was assessed with the residues from the birch dominated site, where in moist sample it was 365 GJ haa??1 and in dry matter 585 GJ haa??1. The heating value of the fresh residues is highest in coniferous trees. The highest ash content in branch segments was registered for the black alder dominated site. J?¤rvselja data indicate higher quality in conifer dominated sites, yet a higher load of logging residues in broadleaf dominated stands.
机译：基于生物质的燃料和燃烧试验的性质表明，测井残留物是有前途的可再生能源。本研究中使用的数据是从J？¤rvselja培训和实验林中中心，2013年东南爱沙尼亚的四个清晰鼠标训练和实验林中中心收集的数据。登录是由苏格兰松树（Pinus Sylvestris L.）的收割机进行的（Picea Abies [L.]喀斯特。），银桦（Betula Pendula Roth）和黑色桤木（Alnus glutinosa L. Gaertn）。主导地位根据切割到长度的方法和测井残留物放入堆中的堆积中，将其他树种的混合物放在堆上。该研究的目的是在清晰砍伐地区评估测井残留物（数量，含水量，能量潜在，灰分含量和金额）的不同特征。在桦木占主导地的研究现场测量了最高斜线载量，其中测井残留物的干重为29ta -? 1。只有黑色桤木子所在地（35.4％）上的分支馏分水分含量明显不同于其他网站上的各个值（21.6A〜25.4％）。残留物的最高热值与来自桦木主导地点的残留物评估，其中在潮湿的样品中它是365 GJ Haa ?? 1和干物质585 GJ Haa ?? 1。新鲜残留物的加热值在针叶树中最高。分支段中的最高灰分含量被注册为黑色桤木主导地点。 j？¤rvselja数据表明针叶树主导地点中的更高质量，但阔叶主导的架子中的伐木残留量更高。

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