We evaluated the impacts of juvenile stand management on wood production based on a nationwide scenario analysis. Measured plot-level information of the Finnish 11^th National Forest Inventory (NFI) from juvenile stands formed the initial data for the analysis. To represent a total of 2.5 million hectares of productive forest land available for wood production, 6900 sample plots were selected. We predicted the development of the sample-plot stands for the next 100 years using the Motti stand simulator. We examined the impacts of juvenile stand management, including early cleaning and precommercial thinning, with three scenarios of different intensities of early-stage management (intensive, no management and business-as-usual). The results showed the benefits of juvenile stand management: earlier harvesting revenues, larger total removals, more valuable wood in the removals, and additional benefits that are associated with the first commercial thinning (i.e. no need for clearing before thinning, a larger stem size of removed trees). The main downside of juvenile stand management was the cost of the early cleaning and precommercial thinning. According to the results, a €560 million increase in costs would result in a €1700 million increase in stumpage earnings in Finnish forests during the next 100-year period. The 34 million m³ increase in the sawlog yield together with 28 million m³ decrease in the pulpwood yield also demonstrated the nationwide potential for increasing valuable sawlog production by intensive management of juvenile stands.

中文翻译：

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芬兰青少年林分管理的好处-基于情景分析对木材生产的影响

我们基于全国情景分析评估了青少年林分管理对木材生产的影响。芬兰^第11站的实测地块信息来自幼林的国家森林清单（NFI）形成了用于分析的初始数据。为了代表总共250万公顷可用于木材生产的生产性林地，选择了6900个样地。我们使用Motti支架模拟器预测了未来100年样地支架的发展。我们以三种不同的早期管理强度（密集，无管理和照常营业）的方案，研究了幼林管理的影响，包括早期清洁和商业前稀疏。结果显示了幼林管理的好处：较早的收获收入，更大的总采伐量，采伐中有价值的木材以及与第一次商业间伐相关的其他收益（即，间伐前无需清理，移除的树木较大的茎）。青少年林分管理的主要缺点是早期清洁和商业前稀疏的成本。根据结果​​，5.6亿欧元的成本增加将在未来100年内使芬兰森林的立木收益增加17亿欧元。3400万米³增加锯材原木产量与2800万米一起³的纸浆原料减产还展示了由少年站在集约化经营提高有价值的锯木生产的全国潜力。