TAILIEUCHUNG - Báo cáo lâm nghiệp: "Evaluation of squared timber and log products in the Hyrcanian Forests of Iran"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Evaluation of squared timber and log products in the Hyrcanian Forests of Iran. | JOURNAL OF FOREST SCIENCE 57 2011 2 64-69 Evaluation of squared timber and log products in the Hyrcanian Forests of Iran S. M. Hosseini1 B. Majnounian2 a. Skoupý3 -Ministry of Science Research and Technology Tehran Iran 2Faculty of Natural Resources University of Tehran Tehran Iran Department of Forest and Forest Products Technology Mendel University in Brno Brno Czech Republic ABSTRACT The forests located in the northern areas of Iran are known as Hyrcanian Forests and are distributed across three provinces namely Gilan Maznadarn and Golestan. These provinces are situated in the north of Iran near the Caspian Sea. Timber products in the said forests during the last two decades were markedly different so that the total timber harvested in the first decade was million m3 on average however in the second decade it nearly amounted to 1 million m3. Two major timber products of Iran are studied and compared in this research namely logs and squared timber. Squared timber products averaged during the first decade but they fell to over the second decade. Apropos of log products they reached and over the first and the second decade respectively. Analyses of the data indicate the following converse linear equation between squared timber products and log products during the 20 years of study Y Y log products X squared timber R2 . Accordingly any increase in log products at a time caused the squared timber products to decrease at the same time. Keywords Hyrcanian Forests logs mechanized harvesting system squared timber The Hyrcanian Forests of Iran are natural broadleaved forests located in the north of Iran near the Caspian Sea Fig. 1 . They have uneven topography and very steep slopes so that these regions with slopes larger than 100 have been designated as the protected areas where harvesting operations are banned. Due to the ecosystemic and environmental aspects biodiversity ecology and eco-tourism values and their historical .

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