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集材是木材生产工艺中的一项重要工序,耗资多、工作量大、组成复杂。研究和选用最佳集材方式对合理组织木材生产、保证安全、降低成本、提高效益具有重要的现实意义。一、宁西林区自然概况宁西林业局位于秦岭中段,经营区总面积为106.545公顷,森林覆被率85%,属秦岭林区水源涵养用材林。林分特点为异龄林、次生低产林。森林垂直分布明显,树种繁多,主要有云杉、冷杉、铁杉、油松、华山松、栎类、杨、榆类及枫杨、椴木、水曲柳等。该区地形复杂,山高坡陡,落差大,沟道窄;地貌北高南低,北陡南缓,最高海
Skidding is an important process in the wood production process, which consumes a lot of money, has a heavy workload and is complicated in composition. It is of great practical significance to study and choose the best method of timbering to reasonably organize timber production, ensure safety, reduce costs and improve efficiency. First, the Ningxi forestry natural profile Ningxi Forestry Bureau is located in the middle of the Qinling Mountains, the total operating area of 106.545 hectares, the forest cover rate of 85%, is Qinling forest water conservation timber. Stands are characterized by heterogeneous forest, secondary low yield forest. Vertical distribution of the forest is obvious, there are many species, mainly spruce, fir, hemlock, pine, Huashan song, oak, Yang, elm and maple, basswood, ash and so on. The area has a complex terrain with steep mountain slopes, large drops and narrow channels. The topography of the area is high in the north and low in the south, while the south is steep in the south and highest in the sea